Foe reviewer compilation

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NOTES ON CRIME DETECTION AND INVESTIGATION
CDI-6: FIRE TECHNOLOGY AND ARSON INVESTIGATION
FIRE
- a rapid, self-sustaining oxidation process accompanied by the evolution of heat and light of varying
intensity
- an active chemical reaction that takes place between fuel, heat and oxygen in the form of light and
noticeable heat
- a chemical reaction; the rapid oxidation of a fuel producing heat and light
- an oxidation taking place with a rate rapid enough to produce heat and light
TECHNOLOGY
- the branch of knowledge that deals with industrial arts and sciences
- the application of such knowledge that is used to produce the material necessity of society
ELEMENTS OF FIRE OR TRIANGLE OF FIRE
FUEL
- anything that will burn when heated with sufficient oxygen
OXYGEN
- aids in combustion; comes from the atmosphere we breath; the atmosphere contains: 21% oxygen,
78% nitrogen and 1% impurities
HEAT
- source of ignition
TRIANGLE OF FIRE
For many years, the fire triangle (oxygen, fuel and heat) was taught as the components of fire. While
this simple example is useful, it is NOT technically correct.
TETRAHEDRON OF FIRE
- a geometric representation of what is required for fire to exist, namely, fuel, an oxidizing agent,
heat, and an uninhibited chemical reaction
FIRE TETRAHEDRON
- Oxygen (oxidizing agent)
- Fuel
- Heat
- Self-sustained chemical reaction
Each component of the tetrahedron must be in place for combustion to occur. Remove one of the
four components and combustion will not occur. If ignition has already occurred, the fire is
extinguished when one of the components is removed from the reaction.
OXYGEN (Oxidizing Agent)
- a colorless, odorless gas and one of the compositions of air which is approximately 21% percent by
volume
-
Oxygen sources: Oxygen requirements:
1. 21% of normal oxygen 1. 12% no fire
2. 78% nitrogen 2. 14% flash point
3. 1% other gases 3. 21% fire point
FUEL
- the material or substance being oxidized or burned in the combustion process.
Fuel sources
1. Solid
- molecules are closely packed together
2. Liquid

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- molecules are loosely packed
3. Gas
- molecules are free to move
HEAT
- the energy component of the fire tetrahedron
- when heat comes into contact with a fuel, the energy supports the combustion reaction
- heat energy is measured in units of Joules (J), however it can also be measured in Calories (1
Calorie = 4.184 J) and BTU's (1 BTU = 1055 J)
TEMPERATURE
- a measure of the degree of molecular activity of a material compared to a reference point
- a measure of the degree of molecular activity of a material compared to a reference point
- measured in degrees Farenheit or degrees Celsius
º C º F Response
37 98.6 Normal human oral/body temperature
44 111 Human skin begins to feel pain
48 118 Human skin receives a first degree burn injury
55 131 Human skin receives a second degree burn injury
62 140 A phase where burned human tissue becomes numb
72 162 Human skin is instantly destroyed
100 212 Water boils and produces steam
140 284 Glass transition temperature of polycarbonate
230 446 Melting temperature of polycarbonate
250 482 Charring of natural cotton begins
300 572 Charring of modern protective clothing fabrics begins
600 1112 Temperatures inside a post-flashover room fire
Types of Energy (common sources of heat)
1. Chemical Energy
2. Electrical Energy
3. Nuclear Energy
4. Mechanical Energy
CHEMICAL ENERGY
- the most common source of heat in combustion reactions
When any combustible is in contact with oxygen, oxidation occurs. The reaction of this process
results in the production of heat.
ex. Heat generated from burning match, self heating (spontaneous heating)
ELECTRICAL ENERGY
- can generate temperature high enough to ignite any combustible material near the heated area
Examples:
1. over current or overload
2. arcing
3. sparking
4. static
5. lightning
NUCLEAR ENERGY
- generated when atoms either split apart (fission) or combine (fusion)
Ex.
1. fission heats water to drive steam turbines and produce electricity
2. solar energy is a product of a fusion reaction

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MECHANICAL ENER GY
- an energy created by friction and compression
1) Heat of friction - the movement of two surfaces against each other, thus producing sparks
2) Heat of compression - heat is generated when a gas is compressed in a container or cylinder
SELF-SUSTAINED CHEMICAL REACTION
Combustion is a complex reaction that requires a fuel (in the gaseous or vapor state), an oxidizer,
and heat energy to come together in a very specific way. Once flaming combustion or fire occurs, it
can only continue when enough heat energy is produced to cause the continued development of fuel
vapors or gases. Scientists call this type of reaction a “chain reaction”.
A chain reaction is a series of reactions that occur in sequence with the result of each individual
reaction being added to the rest.
FIRE DEVELOPMENT
When the four components of the fire tetrahedron come together, ignition occurs. For a fire to grow
beyond the first material ignited, heat must be transmitted beyond the first material to additional fuel
packages.
Stages of Fire
- Ignition
- Growth
- Flashover
- Fully-developed
- Decay
IGNITION
- describes the period when the four elements of the fire tetrahedron come together and combustion
begins
GROWTH
- shortly after ignition, a fire plume begins to form above the burning fuel. As the plume develops, it
begins to draw or entrain air from the surrounding space into the column.
FLASHOVER
- the transition between the growth and the fully developed fire stages and is not a specific event
such as ignition. During flashover, conditions in the compartment change very rapidly as the fire
changes from one that is dominated by the burning of the materials first ignited to one that involves
all of the exposed combustible surfaces within the compartment.
FULLY-DEVELOPED
- occurs when all combustible materials in the compartment are involved in the fire
DECAY
- as the fire consumes the available fuel in the compartment, the rate of heat released begins to
decline.
THREE (3) STAGES OF FIRE
1. Incipient phase
2. Free burning phase
3. Smoldering
1. INCIPIENT STAGE
- initial stage of fire
Characteristics
- normal room temperature
- oxygen plentiful
- thermal updraft rise accumulates at higher point

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- temperature at 1000 F
- Producing C02, CO, SO2, water and other gases
2. FREE BURNING PHASE
- a phase of burning in which materials or structures are burning in the presence of adequate oxygen
Characteristics
- fire has involved more fuel
- oxygen supply has depleted
- heat accumulates at upper area
- temperature exceeds 1,330 F
- area is fully involved
3. SMOLDERING PHASE
- final phase of burning wherein flame ceases but dense smoke and heat completely fill the confined
room
MODES OF HEAT TRANSFER
Heat is by-product of combustion that is of significant importance to the firefighter. It is heat that
causes fire to sustain its combustion and, more important, to extend. When heat given off as a
product of combustion is exposed to an unheated substance, certain changes occur that can make
the new substance a contributing factor in extending a fire.
CONDUCTION
- heat transfer within solids or between contacting solids
When a hot object transfers its heat, conduction has taken place. The transfer could be to another
object or to another portion of the same object. As we have discovered and will be constantly
reinforced about, combustion occurs on the molecular level. When an object heats up, the atoms
become agitated and begin to collide with one another. A chain reaction of molecules and atoms,
like wave energy, occurs and causes the agitated molecules to pass the heat energy to areas of
non-heat.

CONVECTION
- heat transfer by the movement of liquids or gasses
Air that is hotter than its surroundings rises. Air that is cooler than its surroundings sinks. Air is made
up of many molecules floating about freely. Even so, it still has weight. Some molecules are made
up of the same element. For example, oxygen in its natural state will combine with another oxygen
atom to form a stable oxygen molecule. In a given volume, air at a given temperature will have the
same density. When heated, as in conduction theory, the molecules become agitated and begin to
collide with one another. In the process, the molecules are demanding more space to accommodate
the vibrations and they push into one another as they seek that space. When that happens, the
density of a given volume is reduced and it weighs less. Because it weighs less, it rises until it
reaches equilibrium-the level at which the weight is the same as the surrounding atmosphere.
RADIATION
- heat transfer by electromagnetic waves
The last form of heat transfer occurs by radiation. As we have already seen, heat energy can be
transmitted directly when molecules collide with one another and cause the waves of heat energy to
travel.
FLAME CONTACT
- heat may be conducted from one body to another by direct flame contact
PROPERTIES OF FIRE
1. Physical properties
2. Chemical Properties

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1. PHYSICAL PROPERTIES
a. Specific gravity
- the ratio of the weight of a solid or substance to the weight of an equal volume of water
b. Vapor density
- the weight of volume of pure gas compared to weight of a volume of dry air at the same
temperature and pressure
c. Vapor pressure
- the force exerted by the molecules on the surface of the liquid at the equilibrium
d. Temperature
- the measure of the thermal degree of the agitation of molecules of a given substance; the measure
of the molecular activity within the substance
e. Boiling Point
- the constant temperature at which the vapor pressure of the liquid is equal to the atmospheric
pressure
f. Ignition temperature
- the minimum temperature to which the substance in the air must be heated in order to initiate or
cause self-contained combustion without addition of heat from outside sources
g. Fire point
- the temperature at which the material will give off ample vapors to keep burning
h. Flash point
- the temperature at which the material is not hot enough to keep burning, but still gives off enough
vapors to cause a flame across the surface
2. CHEMICAL PROPERTIES
a. Endothermic reaction
- are changes whereby energy is absorbed or is added before the reaction takes place
b. Exothermic reaction
- reactions or changes that releases or give off energy
c. Oxidation
- a chemical change in which combustible material and an oxidizing material react
d. Combustion or flame
- the manifestation of fire is in its gas-phased combustion; matter that is produced by fire.
Material Ignition Temperature
F C
Gasoline 536 280
Kerosene 410 210
Turpentine 488 253
Paper 842 450
Wood 489 254
Coal 750 400
CLASSIFICATIONS OF FIRE
I. BASED ON CAUSE
a. Natural fire/ providential
b. Accidental fire
c. Intentional Fire/Incendiary
d. Undetermined
A. NATURAL FIRE
- involves fires without direct human intervention
Examples:
- Earthquake
- Typhoon
- Lightning
- Spontaneous combustion arising from the storage of combustible materials in poorly ventilated

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places
- Explosion from petroleum products, alcohol and other substances
- Sun rays focused on glasses which may serve as a convex lens
B. ACCIDENTAL FIRE
- Carelessly discarded cigarettes
- Careless disposition of readily combustible materials
- Poorly managed or defective heating facilities
- Overheating, spark and electrical defects
- Overload electric circuits/ Octopus connections
- Children playing matches
- Use of candles
C. INCENDIARY FIRE
- is one deliberately set under circumstances in which the person knows that the fire should not be
set
D. UNDETERMINED FIRE CAUSE
- whenever the cause cannot be proven, the proper classification is undetermined
II. BASED ON BURNING FUEL
CLASS A
- ordinary solid materials such as wood, paper, fabrics, etc.
- this will be indicated by deep cited fire, leaves ashes and embers (glowing coals) after burning
CLASS B
- flammable liquids such as gasoline, lube oil, kerosene, paint thinner, etc.
CLASS C
- electrical appliances; causes electric shock
CLASS D
- metal fire such as magnesium (white element burning with dazzling light), sodium (a silver white
metallic element), etc.; creates violent reaction
CLASS E
- flammable gases such as LPG, LNG, etc.; also creates violent reaction
Fire Classes in the United Kingdom and Europe
A – ordinary combustibles
B – flammable or flammable liquids
C – flammable gasses
D – combustible metals
E – (this class is no longer existing in Europe)
F – cooking oils and fats
Fire Classes in Australia and Asia
A – everyday combustibles
B – combustible or combustible liquids
C – combustible gasses
D – combustible metals
E – electrical equipment
F – cooking fats and oils
Fire Classes in the U.S.A. (NFPA)
A – regular combustibles
B – flammable liquids and gasses
C – electrical appliances
D – combustible metals
K – cooking oils and fats

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FIRE EXTINGUISHMENT
EXTINGUISHING AGENT
1. Class A – water (all agents)
2. Class B – foam/carbon dioxide (all agents)
3. Class C – carbon dioxide/powder (never use water, soda acid and foam)
4. Class D – special powder
5. Class E – all agents
METHODS OF EXTINGUISHMENT
1. COOLING – heat absorption.
2. SEPARATION – the removal of the fuel.
3. SMOTHERING – by expelling oxygen
4. Inhibition or the interruption of chemical chain reaction
Strategies Used in Firefighting:
1. Locate the fire
2. Confine the fire
3. Extinguish the fire
4. Exposures
Factors to Consider in Extinguishment:
1. Time
2. Weather (temperature, humidity, wind)
3. Fire ( ex. Extent, location, bldg construction, contents involved)
4. Occupancy
5. Ventilation (used for clearing the bldg of smoke and gases)
Types of Ventilation:
a. Vertical ventilation - must be worked from the top to bottom
b. Cross or horizontal ventilation - used if gases have not reached the higher level through the
opening of windows
c. Mechanical force ventilation - a method whereby a device such as smoke ejector is utilized to
remove faster excessive heat and dense smoke
Factors to determine the location for the opening:
1. Location of intensity of fire
2. Highest point on the roof
3. Direction of wind
4. Existing exposure
5. Extent of fire
6. Obstruction
ADDITIONAL BASIC TACTICS USED IN EXTINGUISHING FIRE
1. RESCUE - any action taken by the firefighters to remove occupants/ persons from building/
hazards to a safety place
2. OVERHAUL - a complete and detailed checked of the structures and materials involved in the fire
to make sure that every spark and ember has been extinguished and to have assurance against re-
ignition
3. SALVAGE - an action taken by the firefighters in preventing excessive damage by fire, water with
the use of salvage cover or by removing materials out from the burning building
Types of ladder
1. Ground ladders (10 to 55 ft. long)
2. Aerial ladders
Purposes of ladders
a. for rescue

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b. to stretch line into a fire building
c. to provide ventilation by giving access to places that are hard to reach
Forms of ground ladders
a. Wall
b. Extension
c. Hook or straight ladder
d. Attic ladder
LADDER TERMINOLOGY
1. Bed ladder - the lowest section of an extension ladder
2. Fly ladder - the top section of an extension ladder
3. Butt - the bottom end of a ladder
4. Heel - the part of the ladder that touches the ground
5. Halyard - a rope or cable used to raised the fly ladder
6. Pawl or dog - the mechanism located at the end of the fly ladder that locks to the bed ladder
7. Rung - the cross member of the ladder that is used for climbing
8. Top or tip - it is the top part of the ladder
9. Hooks - part of a ladder that is used to hook over a roof peak, sills, or walls where the heel does
not rest on a foundation. (roof type ladders)
10. Stops - made of metal or wood blocks used to prevent the fly of an extension ladder from
extending out further from the ladder
11. Guides - light metal strips of an extension ladder that guides the fly ladder while it is being raised
or lowered
ARSON INVESTIGATIVE GUIDE AND PROCEDURES
ARSON
- the willful and malicious burning of all kinds of buildings and structures including personal
properties
INVESTIGATION
- an art that deals with the identity and location of the offender and provides evidence of his guilt in
criminal proceedings
ELEMENTS OF ARSON
1. Actual burning took place
2. Actual burning is done with malicious intent
3. The actual burning is done by person(s) legally and criminally liable
LAW AND JURISPRUDENCE
The law on arson in the Philippines is covered by Articles 320 to 326 of the Revised Penal Code, as
amended by PD No. 1613, PD No. 1744, and Sec. 50 Rule VIII IRR of RA 6975 which provides that
the Bureau of Fire Protection (BFP) shall have the power to investigate all causes of fires and, if
necessary, file the proper complaint with the City/Provincial prosecutor who has jurisdiction over
arson cases.
LAWS ON ARSON
1. Article 320 – 326 of the Revised Penal Code
- defines arson, its forms and penalties
2. PD 1613 – the law amending the law on arson
- defining the prima facie evidence of arson
3. RA 7659
- An Act to Impose Death Penalty on Certain Heinous Crimes, amending for that purpose the
Revised Penal Code as amended, other special laws, and for other purposes
4. RA 6975 Sec. 54
- provides that the Fire Bureau shall have the power to investigate all causes of fires and if

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necessary file the proper complaint with the City/Provincial Prosecutor who has jurisdiction over the
case
What Constitutes Arson?
1. Burning
2. Willfulness – means intentional and implies that the act was done purposely and intentionally
3. Malice – denotes hatred or ill will or a desire for revenge; deliberate intention of doing unjustified
harm for the satisfaction of doing it
4. Motive – the moving cause which induces the commission of a crime; something that leads or
influences a person to do something
5. Intent – the purpose or design with which the act is done and involves the will; an essential
element of crime, motive is not
Why is arson very hard to investigate?
Arson is one of the most difficult offenses to investigate because the arsonist can be able to set a
fire and escape undetected. The fire can consume the scene and destroy much physical evidence of
the offense. Harder forms of evidence are often buried in debris and grossly altered in appearance.
What Constitutes Burning?
 The mere fact that a building is scorched or discolored by heat is not sufficient nor will bare
intention or even an attempt to burn a house amount to arson, if no part of it is burned.
 Yet, if there is actual ignition of any part of the building, arson is committed, although there be no
flame or the fire immediately goes out of itself.
 To burn means to consume by fire and in the case of arson, if the wood is blackened but no fibers
are wasted, there is no burning, yet the wood need not be in flame or blaze, and the burning of any
part, however, small is sufficient to constitute arson, and if the house is charred in a single place so
as to destroy the fibers of the wood, it is sufficient to constitute arson.
What is Attempted Arson?
 In attempted arson, it is not necessary that there be a fire before the crime is committed. No hard
and fast rule is laid down by the law as to the requirements for attempted arson. The peculiar facts
and circumstances of a particular case should carry more weight in the decision of the case. Thus, a
person intending to burn a wooden structure, collects some rags, soaks them in gasoline and places
them beside the wooden wall of the building. When he is about to light a match to set fire to the rags,
he is discovered by another who chases him away.
 The crime committed is attempted arson, because the offender begins the commission of the
crime directly by overacts (placing the rags soaked in gasoline beside the wooden wall of the
building and lighting a match) but he does not perform all the acts of execution (the setting of the fire
to the rags) due to the timely intervention of another who chases away) the offender.
What is Frustrated Arson?
 In frustrated arson, the fact of having set fire to some rags and jute sacks soaked in kerosene oil
and placed near the partition of the entire soil of an inhabited house, should not be qualified as a
consummated arson, in as much as no part of the house had begun to burn, although fire would
have started in the said partition had it not been extinguished on time. The crime committed was
frustrated arson.
What is Consummated Arson?
 The offender did in fact set fire to the roof of the house and said house was partially burned. The
crime was consummated arson, notwithstanding the fact that the fire afterwards extinguished for
once it has been started, the consummation of the crime of arson does not depend upon the extent
of the damage caused.
 Setting fire to the contents of a building constitutes the consummated crime of setting fire to a
building even if no part of the building was burned.

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Basis of Liability in Arson:
1. Kind and character of the building, whether of public or private ownership.
2. Its location, whether in an uninhabited place or in a populated place.
3. Extent of damage caused; and
4. The fact of its being inhabited or not.
Some of the Arson Evidence that the Investigator should seek at the Fire scene are the following:
1. Unusually rapid spread of the fire.
2. Where it originated?
3. Separate fires – when two or more separate fires break-out within a building, the fire is certainly
suspicious.
4. Unusual odors – the odor of gasoline, alcohol, kerosene and other inflammable liquids are
indicated by their characteristics and oftentimes, arsonists are trapped because of this tell tale signs.
5. Objects that appear to be foreign to the scene such as cans, candles, matches, explosives,
electrical appliances such as irons, heating elements, clocks, radios, flammables, trailers, etc.
6. Charring pattern may indicate fire characteristics. The fact that the fire feeds on combustible while
propagating itself, indicates that the char will generally be deepest from where the fire originates.
When a fire is extinguished quickly, the charring is only slightly below the surface. Fire burning for a
longer period of time will indicate a char that is deep and pronounced. These facts are most
apparent in the charring of wood as a fire burns. The charring from fire on woods looks like the hide
of a black alligator. Fire extinguished quickly on wood will show a large alligatoring pattern that has
not penetrate the wood to any extent. Fire burning for a long period of time on wood will show small
alligatoring pattern but the char will go deep into the wood. The direction of fire can also be taken
into consideration with charring. The exposed side of combustible will have a deeper char than the
unexposed side.
7. Evidence of forcible entry or lack of same may be important depending on the circumstances at
the time of the fire. If the investigator determines there was no forcible entry and finds that the
building was secured prior to discovery of the fire, he can reasonably suspect there is possibility that
the person who sets the fire entered the building with a key. Doors and windows showing signs of
forced entry may point to arson preceded by burglary or arson by someone without a key to the
premises.
Motives of Arson
Motive
 Motive is the moving cause which induces a person to commit a crime.
Is Motive Necessary to be Proven in Criminal Proceedings?
 No. motive is not necessary to be proven in criminal proceedings but once motive is shown, then
intent can easily established.
 In the crime of arson, the distinction between motive and intent is clearly defined. INTENT is a
material element of arson while motive is not. INTENT is the purpose of design with which the act is
done and involves the will while MOTIVE is what induces the criminal.
Motive Can Be Established By:
I. Economic Gain
A. Insurance fraud with the assured directly benefiting:
1. Desire to move
– the premises may no longer be desirable because of the condition of the building, the fact that the
quarters are outgrown or because of the locality.
2. Disposing of Merchandise
– the stocks on hand may have lost value by reason of the seasonal nature of the business,
obsolesce, scarcity of materials necessary to complete the contracts, overstock in the absence of
expected order or a changing market.
3. Property Transaction
– the business itself may no longer be desirable because of impending liquidation, settlement of an

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estate of which it is a part, the need for cash, prospective failure, the comparatively greater value of
the land, or the comparatively greater value of the insurance benefits.
B. Profit by the Perpetrator other than the assured:
1. Insurance agents wishing business
2. Insurance adjusters desiring to adjust a loss by securing a contract
3. Business competitors
4. Persons seeking jobs as protection personnel
5. Salvagers
6. Contractors wishing to rebuild or wreck
Concealment of Crime:
 the arsonists may set fire to a building in order to conceal a projected or past crime. He may wish
to divert attention in order to loot the burning premises or steal in other places. The burning may be
for the purpose of destroying evidences.
Punitive Measure:
- An arsonists may use fire as a means of punishing another person for reason of jealousy, hatred or
revenge.
Intimidation or Economic Disabling:
- The fire may be used as a weapon of the saboteurs, the strikers or the racketeers to intimidate or
to disable economically as a step toward forcing submission to certain demands.
Pyromania
– is the uncontrollable impulse of a person to burn anything without motivation. Pyromaniacs usually
do not run away from the scene of the crime, usually alone and feel satisfied watching the flame
Types of Pyromaniacs:
1. Abnormal Youth – Epileptics, imbeciles and morons may set fire without knowing the seriousness
of the act.
2. The Hero Type – a person may set fire on a building, subsequently pretends to discover it and
turn in the alarm so that he will appear a hero to the public. A person may burn a building and
endeavor to achieve spectacular rescue in order to attract the attention of spectators.
3. Alcoholics and Drug Addicts – persons who subject themselves to intense artificial stimulants
such as narcotics sometimes develop a strong urge toward incendiaries.
4. Sexual Deviates – some sex perverts derive sexual stimulation from setting a fire and watching
the flame. Frequently, he is chronic masturbator who stimulates and enhances his sexual
gratification by means of arson.
Public Disturbance
- an offender may resort to arson as a means of a public disturbance because a fire attracts people
and destruction causes confusion that gives rise to attendant problems that divert police attention.
Vandalism
– is a general term denoting intentional burning to destroy properties.
In determining motive, a fire investigator concentrates on three major factors:
1. Points of origin of the fire
2. Modus operandi of the arsonist
3. Identify of persons who might benefits from the fire.
Incendiary Materials
- materials used to start a fire; combustible fuels
1. Arson Chemicals (liquids) – are incendiary materials often used by arsonists as accelerants.
Possess excellent properties. Examples: alcohol, benzene, petroleum ether, gasoline, kerosene,
naptha, turpentine.
2. Gases as acetylene, butane, CO, ethylene, hydrogen, natural gas, propane, these are common
gases resulting in fires from explosion. These when mix with air possess excellent in ignition
properties and when present in an enclosed area can lead to explosion.

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3. Solids as chlorates, perchlorates, chromates, bichromates, nitrates, permanganates – are typical
families of oxidizing agents which give off oxygen on decomposition thus aiding in combustion.
FIRE CODE OF THE PHILIPPINES
Republic Act No. 9514
- Approved on December 19, 2008
- Repealed PD 1185
- known as the "Revised Fire Code of the Philippines of 2008".
Definition of terms
Abatement - Any act that would remove or neutralize a fire hazard.
Administrator - Any person who acts as agent of the owner and manages the use of a building for
him.
Blasting Agent - Any material or mixture consisting of a fuel and oxidizer used to set off explosives.
Cellulose Nitrate Or Nitro Cellulose - A highly combustible and explosive compound produced by the
reaction of nitric acid with a cellulose material.
Cellulose Nitrate Plastic (Pyroxylin) - Any plastic substance, materials or compound having cellulose
nitrate (nitro cellulose) as base.
Combustible, Flammable or Inflammable - Descriptive of materials that are easily set on fire.
Combustible Fiber - Any readily ignitable and free burning fiber such as cotton, oakum, rags, waste
cloth, waste paper, kapok, hay, straw, Spanish moss, excelsior and other similar materials
commonly used in commerce.
Combustible Liquid - Any liquid having a flash point at or above 37.8_C (100_F).
Corrosive Liquid - Any liquid which causes fire when in contact with organic matter or with certain
chemicals.
Curtain Board - A vertical panel of non-combustible or fire resistive materials attached to and
extending below the bottom chord of the roof trusses, to divide the underside of the roof into
separate compartments so that heat and smoke will be directed upwards to a roof vent.
Cryogenic - Descriptive of any material which by its nature or as a result of its reaction with other
elements produces a rapid drop in temperature of the immediate surroundings.
Damper - A normally open device installed inside an air duct system which automatically closes to
restrict the passage of smoke or fire.
Distillation - The process of first raising the temperature in separate the more volatile from the less
volatile parts and then cooling and condensing the resulting vapor so as to produce a nearly purified
substance.
Duct System - A continuous passageway for the transmission of air.
Dust - A finely powdered substance which, when mixed with air in the proper proportion and ignited
will cause an explosion.
Electrical Arc - An extremely hot luminous bridge formed by passage of an electric current across a
space between two conductors or terminals due to the incandescence of the conducting vapor.
Ember - A hot piece or lump that remains after a material has partially burned, and is still oxidizing
without the manifestation of flames.
Finishes - Materials used as final coating of a surface for ornamental or protective purposes.
Fire - The active principle of burning, characterized by the heat and light of combustion.
Fire Trap - A building unsafe in case of fire because it will burn easily or because it lacks adequate
exits or fire escapes.

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Fire Alarm - Any visual or audible signal produced by a device or system to warm the occupants of
the building or fire fighting elements of the presence or danger of fire to enable them to undertake
immediate action to save life and property and to suppress the fire.
Fire Door - A fire resistive door prescribed for openings in fire separation walls or partitions.
Fire Hazard - Any condition or act which increases or may cause an increase in the probability of the
occurrence of fire, or which may obstruct, delay, hinder or interfere with fire fighting operations and
the safeguarding of life and property.
Fire Lane - The portion of a roadway or public way that should be kept opened and unobstructed at
all times for the expedient operation of fire fighting units.
Fire Protective And Fire Safety Device - Any device intended for the protection of buildings or
persons to include but not limited to built-in protection system such as sprinklers and other automatic
extinguishing system, detectors for heat, smoke and combustion products and other warning system
components, personal protective equipment such as fire blankets, helmets, fire suits, gloves and
other garments that may be put on or worn by persons to protect themselves during fire.
Fire Safety Constructions - Refers to design and installation of walls, barriers, doors, windows,
vents, means of egress, etc. integral to and incorporated into a building or structure in order to
minimize danger to life from fire, smoke, fumes or panic before the building is evacuated. These
features are also designed to achieve, among others, safe and rapid evacuation of people through
means of egress sealed from smoke or fire, the confinement of fire or smoke in the room or floor of
origin and delay their spread to other parts of the building by means of smoke sealed and fire
resistant doors, walls and floors. It shall also mean to include the treatment of buildings components
or contents with flame retardant chemicals.
Flash Point - The minimum temperature at which any material gives off vapor in sufficient
concentration to form an ignitable mixture with air.
Forcing -A process where a piece of metal is heated prior to changing its shape or dimensions.
Fulminate - A kind of stable explosive compound which explodes by percussion.
Hazardous Operation/Process - Any act of manufacturing, fabrication, conversion, etc., that uses or
produces materials which are likely to cause fires or explosions.
Horizontal Exit - Passageway from one building to another or through or around a wall in
approximately the same floor level.
Hose Box - A box or cabinet where fire hoses, valves and other equipment are stored and arranged
for fire fighting.
Hose Reel - A cylindrical device turning on an axis around which a fire hose is wound and
connected.
Hypergolic Fuel - A rocket or liquid propellant which consists of combinations of fuels and oxidizers
which ignite spontaneously on contact with each other.
Industrial Baking And Drying - The industrial process of subjecting materials to heat for the purpose
of removing solvents or moisture from the same, and/or to fuse certain chemical salts to form a
uniform glazing the surface of materials being treated.
Jumper - A piece of metal or an electrical conductor used to bypass a safety device in an electrical
system.
Occupancy - The purpose for which a building or portion thereof is used or intended to be used.
Occupant - Any person actually occupying and using a building or portions thereof by virtue of a
lease contract with the owner or administrator or by permission or sufferance of the latter.
Organic Peroxide - A strong oxidizing organic compound which releases oxygen readily. It causes
fire when in contact with combustible materials especially under conditions of high temperature.

14

Overloading - The use of one or more electrical appliances or devices which draw or consume
electrical current beyond the designed capacity of the existing electrical system.
Owner - The person who holds the legal right of possession or title to a building or real property.
Oxidizing Material - A material that readily yields oxygen in quantities sufficient to stimulate or
support combustion.
Pressurized Or Forced Draft Burning Equipment - Type or burner where the fuel is subjected to
pressure prior to discharge into the combustion chamber and/or which includes fans or other
provisions for the introduction of air at above normal atmosphere pressure into the same combustion
chamber.
Public Assembly Building - Any building or structure where fifty (50) or more people congregate,
gather, or assemble for any purpose.
Public Way - Any street, alley or other strip of land unobstructed from the ground to the sky, deeded,
dedicated or otherwise permanently appropriated for public use.
Pyrophoric - Descriptive of any substance that ignites spontaneously when exposed to air.
Refining - A process where impurities and/or deleterious materials are removed from a mixture in
order to produce a pure element of compound. It shall also refer to partial distillation and electrolysis.
Self-Closing Doors - Automatic closing doors that are designed to confine smoke and heat and delay
the spread of fire.
Smelting - Melting or fusing of metallic ores or compounds so as to separate impurities from pure
metals.
Sprinkler System - An integrated network of hydraulically designed piping installed in a building,
structure or area with outlets arranged in a systematic pattern which automatically discharges water
when activated by heat or combustion products from a fire.
Standpipe System - A system of vertical pipes in a building to which fire hoses can be attached on
each floor, including a system by which water is made available to the outlets as needed.
Vestibule - A passage hall or antechamber between the outer doors and the interior parts of a house
or building.
Vertical Shaft - An enclosed vertical space of passage that extends from floor to floor, as well as
from the base to the top of the building.
Collection of Liquid Samples for Accelerant Testing
Liquid accelerants may be collected with
a. New syringe
b. Siphoning device
c. Evidence container itself
d. Sterilize cotton balls or gauge pads may also be used to absorbed the liquid
Where liquid accelerants are believed to have become trapped in porous materials such as concrete
floor:
a. Lime
b. Diatomaceous earth
c. flour
Collection of liquid evidence absorbed by solid materials including soils and sand:
a. Scooping
b. Sawing
c. Scraping
d. Core drilling
Collecting of Solid samples for accelerant testing
Solid accelerant may be common household materials and compounds or dangerous chemicals.
When collecting solid accelerants:

15

a. The fire investigator must ensure that the solid accelerant is maintained in physical state in which
is found
b. Some incendiary materials remain Corrosive and Reactive
c. Ensure the corrosive nature of these residue does not attack the packaging container
Collection of Gaseous samples
Method of Collection:
a. Use of commercially available mechanical sampling device
b. Utilization evacuated air sampling cans. These cans are specifically designed for taking gaseous
samples
c. Use of clean glass bottled filled with distilled water. Distilled water use as it has had most of the
impurities removed from it. This method simply require the investigator poured the distilled water out
of its bottle in the atmosphere to be sampled. As distilled water leaves the bottle it is replaced by the
gaseous sample
Guide on Interpreting the Damage on Electrical Wire
Collection of Electrical Equipments and Components
Before wires are cut, a photograph should be taken of the wires, and the both ends of the wire
should be tagged and cut so that they can be identified as one of the following:
a. The device or appliance to which it was attached or from which it was severed
b. The circuit breaker or fuse number or location to which the wire was attached or from which it was
severed
c. The wire’s path or the route it took between the device and the circuit protector,
electrical switches, receptacles, thermostats, relays, junction boxes, electrical distribution panels,
and similar equipment and components are often collected as physical evidence.

CDI-5 (ARSON INVESTIGATION)
PART 1
DEFINITION OF TERMS
1. AREA OF ORIGIN – the room or area where the fire began.
2. ARROW PATTERN – a fire pattern displayed on the cross section of a burned wooden structural
member.
3. ARSON – the crime of maliciously and intentionally, or recklessly, starting a fire or causing an
explosion. Precise legal definitions vary among jurisdictions, wherein it is defined by statutes and
judicial decisions.
4. BACKDRAFT – an explosion resulting from the sudden introduction of air (i.e., oxygen) into a
confined space containing oxygen-deficient superheated products of incomplete combustion.
5. CEILING LAYER – a buoyant layer of hot gases and smoke produced by a fire in a compartment.
6. CHAR – carbonaceous material that has been burned and has a blackened appearance.
7. CHAR BLISTERS – convex segments of carbonized material separated by cracks or crevasses
that form on the surface of char, forming on materials such as wood as the result of pyrolysis or
burning.
8. DROP DOWN – the spread of fire by the dropping or falling of burning materials. This is
synonymous with "Fall Down”.
9. FIRE ANALYSIS – the process of determining the origin, cause, development, and responsibility
as well as the failure analysis of a fire or explosion.
10. FIRE CAUSE – the circumstances or agencies that bring a fuel and all ignition source together
with proper air or oxygen.
11. FIRE INVESTIGATION – the process of deterll1illlllg the origin, cause, and development of a fire
or explosion.
12. FIRE SCENE RECONSTRUCTION – the process of recreating the physical scene during fire
scene analysis through the removal of debris and the replacement of contents or structural elements

16

in their pre-fire positions.
13. FLASH FIRE – a fire that spreads rapidly through a diffuse fuel, such as dust, gas, or the vapors
of an ignitable liquid, without the production of damaging pressure.
14. FLASH POINT OF A LIQUID – the lowest temperature of a liquid, as determined by specific
laboratory tests, at which the liquid gives off vapors at a sufficient rate to support a momentary flame
across its surface.
15. FLASHOVER – a transition phase in the development of a contained fire in which surfaces
exposed to thermal radiation reach ignition temperature more or less simultaneously and fire
spreads rapidly throughout the space.
16. FLASH FIRE – a fire that spreads rapidly through a diffuse fuel, such as dust, gas, or the vapors
of an ignitable liquid, without the production of damaging pressure.
17. FLASH POINT OF A LIQUID – the lowest temperature of a liquid, as determined by specific
laboratory tests, at which the liquid gives off vapors at a sufficient rate to support a momentary flame
across its surface.
18. FLASHOVER – a transition phase in the development of a contained fire in which surfaces
exposed to thermal radiation reach ignition temperature more or less simultaneously and fire
spreads rapidly throughout the space.
19. HAZARD – any arrangement of materials and heat sources that presents the potential for harm,
such as personal injury or ignition of combustibles.
20. IGNITION – the process of initiating self-sustained combustion.
21. ISOCHAR - a line on a diagram connecting points of equal char depth.
22. MATERIAL FIRST IGNITED - the fuel that is first set on fire by the heat of ignition. To be
meaningful, both a type of material and a form of material should be identified.
23. HAZARD – any arrangement of materials and heat sources that presents the potential for harm,
such as personal injury or ignition of combustibles.
24. IGNITION – the process of initiating self-sustained combustion.
25. ISOCHAR - a line on a diagram connecting points of equal char depth.
26. MATERIAL FIRST IGNITED - the fuel that is first set on fire by the heat of ignition. To be
meaningful, both a type of material and a form of material should be identified.
27. OCCUPANCY- The purpose for which a building or portion thereof is used or intended to be
used.
28. OXIDIZING MATERIAL- A material that readily yields oxygen in quantities sufficient to stimulate
or support combustion.
29. PLUME – the column of hot gases, flames, and smoke rising above a fire. Also called convection
column, thermal updraft, or thermal column.
30. POINT OF ORIGIN – the exact physical location where a heat source and a fuel come in contact
with each other and a fire begins. P
31. POINTER - the difference in height of a series of fire damaged vertical wood members ranging
from high being the farthest away from a source of heating to the shortest being closer.
32. UBLIC WAY- Any street, alley or other strip of land unobstructed from the ground to the sky,
deeded or otherwise permanently appropriated for public use.
33. PUBLIC ASSEMBLY BUILDING- Any building or structure where fifty or more people
congregate, gather or assembled for any purposes.
34. PYROLYSIS – the transformation of a Compound into one or more other substances by heat
alone. Pyrolysis often precedes combustion.
35. PYROPHORIC - Descriptive of any substances that ignited spontaneously when exposed to air
36. SCIENTIFIC METHOD – the systematic pursuit of knowledge involving the recognition and
formulation of a problem, the collection of data through observation and experiment and the
formulation and testing of a hypothesis.
37. SEAT OF EXPLOSION - a craterlike indentation created at the point of origin of an explosion.
38. SECONDARY EXPLOSION – any subsequent explosion resulting from an initial explosion.
39. SELF-CLOSING DOORS- Automatic closing doors that are designed to confine smoke and heat
and delay the spread of fire.

17

40. SELF-HEATING – the result of exothermic reactions, occurring spontaneously in some materials
under certain conditions, whereby heat is liberated at a rate sufficient to raise the temperature of the
material.
41. SELF-IGNITION - ignition resulting from self-heating. This is synonymous with spontaneous
ignition.
42. SELF-IGNITION TEMPERATURE – the minimum temperature at which the self-heating
properties of a material lead to ignition.
43. SOOT – black particles of carbon produced ill a flame.
44. SPALLING – chipping or pitting of concrete or masonry surfaces.
45. SPARK – a small, incandescent particle.
46. SPONTANEOUS HEATING – process whereby a material increases in temperature without
drawing heat from its surroundings. The process results from oxidation often aided by bacterial
action where agricultural products are involved.
47. SPONTANEOUS IGNITION – initiation of combustion of a material by an internal chemical or
biological reaction that has produced sufficient heat to ignite the material.
48. TIME LINE – graphical representation of the events in the fire incident displayed in chronological
order.
49. FIRE PATTERNS are the visible or measurable physical effects that remain after a fire. These
include thermal effects on materials, such as charring, oxidation, consumption of combustibles,
smoke and soot deposits, distortion, melting, color changes, changes in the character of materials,
structural collapse, and other effects.
50. VESTIBULE- A passage hall or antechamber between the outer doors and the interior parts of a
house or a building.
51. VERTICAL SHAFT- An enclosed vertical space of passage that extends from floor to floor, as
well as from the base to the top of the building.
CDI-5 PART 2
THEORIES
1. There is no complex crime of arson with homicide.
The late Mr. Chief Justice Ramon C. Aquino cited –
“. . . When fire is used with the intent to kill a particular person who may be in a house and that
objective is attained by burning the house, the crime is murder only. When the Penal Code declares
that killing committed by means of fire is murder, it intends that fire should be purposely adopted as
a means to that end. There can be no murder without a design to take life. In other words, if the main
object of the offender is to kill by means of fire, the offense is murder. But if the main objective is the
burning of the building, the resulting homicide may be absorbed by the crime of arson.”
“. .In the classification of crimes committed by fire, attention must be given to the intention of the
author. When fire is used with intent to kill a person who may be in shelter, and that objective is
secured, the crime is murder. Murder or homicide in a juridical sense would exist if the killing were
the objective of the malefactor and the burning of the building was resorted only as the means of
accomplishing his purpose. The rule is otherwise when arson is itself the end and death is a mere
consequence. The crime in such a case would be arson only, absorbing the homicide.”
2. Murder and arson can be committed chronologically in one occasion.
If death results by reason or on the occasion of arson, the crime is simply arson although the
imposable penalty as provided in Sec. 5 of PD 1613, which expressly repealed Arts. 320 to 326-B of
the Revised Penal Code is reclusion perpetua to death (now it is only reclusion perpetua as provided
by Sec. 2 of RA 9346). If the objective of the offender is to kill and arson is resorted to as the means
to accomplish the crime, the offender can be charged with murder only. But if the objective is to kill -
and in fact the offender has already done so - and arson is resorted to as a means to cover up the
killing, the offender may be convicted of two separate crimes of either homicide or murder, and
arson.
3. Arson can be committed to conceal another crime.
For example, when appellants were seen in the vicinity of the burning house and they were not there
to save lives and property but rather to escape from the locus criminis and avoid being made to

18

answer for the consequences of their wicked act. In other words, they were not there to save the
lives and valuables of the victims but to save their own. The court is convinced that appellants
conspired to inflict fatal blows on the victims which cost their lives and thereafter set their house on
fire to conceal the dastardly deed. Conspiracy, as the court said, may be inferred from the acts of the
accused when such acts point to a joint purpose or design.
4. Circumstantial evidence as basis of conviction in the case of arson.
The court has repeatedly ruled that guilt may be established through circumstantial evidence
provided that:
a. there is more than one circumstance;
b. the facts from which the inferences are derived are proven; and,
c. The combination of all the circumstances is sufficient to produce conviction beyond reasonable
doubt.
5. There is no complex crime of arson with homicide.
The late Mr. Chief Justice Ramon C. Aquino cited -
“. . . When fire is used with the intent to kill a particular person who may be in a house and that
objective is attained by burning the house, the crime is murder only. When the Penal Code declares
that killing committed by means of fire is murder, it intends that fire should be purposely adopted as
a means to that end. There can be no murder without a design to take life. In other words, if the main
object of the offender is to kill by means of fire, the offense is murder. But if the main objective is the
burning of the building, the resulting homicide may be absorbed by the crime of arson.”
6. Murder and arson can be committed chronologically in one occasion.
If death results by reason or on the occasion of arson, the crime is simply arson although the
imposable penalty as provided in Sec. 5 of PD 1613, which expressly repealed Arts. 320 to 326-B of
the Revised Penal Code is reclusion perpetua to death (now it is only reclusion perpetua as provided
by Sec. 2 of RA 9346). If the objective of the offender is to kill and arson is resorted to as the means
to accomplish the crime, the offender can be charged with murder only. But if the objective is to kill -
and in fact the offender has already done so - and arson is resorted to as a means to cover up the
killing, the offender may be convicted of two separate crimes of either homicide or murder, and
arson.
7. Establishing the Role of First Responders
The systematic approach recommended is that of the scientific method, which is used in the physical
sciences.
This method provides for the organizational and analytical process so desirable and necessary in a
successful fire investigation.
A. Observe the Fire and Scene Conditions
While approaching a fire scene, first responders should observe and mentally note the following
conditions and activities and, as soon as conditions permit, initiate permanent documentation of the
information (e.g., written notes, voice recordings, videotapes):
1. The presence, location, and condition of victims and witnesses.
2. Vehicles leaving the scene, bystanders, or unusual activities near the scene.
3. Flame and smoke conditions (e.g., the volume of flames and smoke; the color, height, and
location of the flames; the direction in which the flames and smoke are moving).
4. The type of occupancy and use of the structure (e.g., a residential occupancy being used as a
business).
5. Conditions of the structure (e.g., lights turned on; fire through the roof; walls standing; open,
closed, or broken windows and doors).
6. Conditions surrounding the scene (e.g., blocked driveways, debris, and damage to other
structures).
7. Weather conditions.
8. Unusual characteristics of the scene (e.g., the presence of containers, exterior burning or charring
on the building, the absence of normal contents, unusual odors, fire trailers4).
9. The fire suppression techniques used, including ventilation, forcible entry, and utility shutoff

19

measures.
10. The status of fire alarms, security alarms, and sprinklers.
B. Exercise Scene Safety
Upon arrival at the scene, first responders should:
1. Evaluate the scene for safety hazards (e.g., structural collapse of the building; smoke; electrical,
chemical, or biological hazards; other health risks).
2. Establish safety/hazard zones.
3. Communicate hazards to other personnel arriving at the scene.
4. Use tools and personal protective equipment appropriate to the task during all operations.
C. Preserve the Fire Scene
To preserve evidence, first responders should:
1. Observe and mentally note evidence that may be present at the scene, such as:
☺ Fire patterns (including multiple fire locations).
☺ Burn injuries to victims and fire patterns on clothing.
☺ Trailers, ignitable liquids, or other unusual fuel distribution (e.g., piles of newspapers, furniture
pushed together).
☺ Incendiary/ignition/explosive devices (e.g., lighters, matches, timing devices).
☺ Shoe prints and tire impressions.
☺ Broken windows and doors.
☺ Distribution of broken glass and debris.
☺ Indications of forced entry (tools and tool marks).
☺ Containers.
☺ Discarded clothing.
☺ Trace evidence (e.g., hairs, fibers, fingerprints, blood, other body fluids).
☺ Evidence of crimes in addition to the possible arson (e.g., weapons, bodies, drugs, clandestine
drug laboratory equipment).
☺ Witnesses, bystanders, and victims.
☺ Any other unusual items or the absence of normal contents or structural components.
2. Recognize threats to evidence (i.e., its movement, removal, contamination, or destruction) from
any of the following sources:
❀ Fire suppression activities, such as a straight stream applied at the point of origin or deluge
applications that may wash away or dilute potential evidence.
❀ Overhaul activities that destroy fire patterns.
❀ Salvage activities that involve moving or removing potential physical evidence.
❀ Use of a tool in any manner that causes destruction of evidence.
❀ Movement of knobs, switches, and controls on appliances and utilities.
❀ Weather conditions that affect transient evidence (i.e., wind, precipitation, or temperature
changes).
❀ Personnel walking through the scene.
❀ Witnesses and victims leaving the scene.
❀ Medical intervention and treatment of victims (e.g., by damaging evidence at the scene or
destroying victims’ clothing).
❀ Premature removal or movement of bodies.
❀ Vehicles at the scene (e.g., that introduce fluid to the scene through vehicle leaks or destroy other
evidence, including shoe prints and tire impressions).
❀ Contamination from external sources, such as fuel-powered tools or equipment.
3. Protect Evidence by:
✵ Limiting excessive fire suppression, overhaul, and salvage.

20

✵ Avoiding needless destruction of property.
✵ Leaving bodies undisturbed.
✵ Flagging items of evidence with cones or markers.
✵ Recording observations through written notes or voice recordings.
✵ Covering items or areas containing evidence with objects that will not contaminate the evidence
(e.g., clean boxes or tarpaulins).
✵ Isolating items or areas containing evidence with rope, barrier tape, barricades, or sentries.
✵ Retaining and securing clothing items removed from victims and suspects.
✵ Obtaining information about victims and witnesses (i.e., their names, addresses, and telephone
numbers).
✵ Preserving transient evidence (e.g., trace evidence, shoe prints, tire impressions).
✵ Removing evidence at risk of imminent destruction by the fire or the structural collapse of the
damaged building.
✵ Ensuring that later arriving investigators are fully apprised of the evidence discovered.
D. Establish Security and Control
1. Set up a security perimeter (e.g., using barrier tape, fire line, and sentry).
2. Control access into the scene through the security perimeter.
3. Initiate documentation of the sc
E. Coordinate Activities
To coordinate activities at the scene, first responders should:
1. Establish a command post and implement an incident command system (i.e., a point of contact
and line of communication and authority for public safety
Personnel).
2. Establish staging areas to ensure that emergency and support vehicles have access into the area.
3. Request additional personnel resources, such as firefighters, EMS personnel, law enforcement
officers, investigators, and representatives of utility companies.
4. Inform authorities about the status of the incident, hazards, injuries, witnesses, the location of
evidence, and other pertinent facts.
8. SPALLING is the breakdown in surface tensile strength of concrete, masonry, or brick caused by
exposure to high temperatures and rates of heating resulting in mechanical forces within the
material.
9. CLEAN BURN is a phenomenon that appears on noncombustible surfaces when the soot and
smoke condensate that would normally be found adhering to the surface is burned off.
This produces a clean area adjacent to areas darkened by products of combustion. Clean burn is
produced most commonly by direct flame contact or intense radiated heat.
10. The appearance of the V SHAPED PATTERNS is created by flames, convective or radiated heat
from hot fire gases, and smoke within the fire plume. The V pattern often appears as lines of
demarcation, defining the borders of the fire plume and less heated areas outside the plume.
11. INVERTED CONES are commonly caused by the vertical flame plumes of the burning volatile
fuels not reaching the ceiling.
12. U PATTERNS are similar to the more sharply angled V patterns but display gently curved lines
of demarcation and curved rather than angled lower vertices.
13. TRUNCATED CONE PATTERNS, a lso called truncated plumes, are three-dimensional fire
patterns displayed on both horizontal and vertical surfaces.
14. Irregularly shaped pattern on floor carpeting resulting from poured ignitable liquid. Burned match
can be seen at lower left.

15. “SADDLE BURNS” are distinctive U- or saddle-shaped patterns that are sometimes found on the
top edges of floor joists. They are caused by fire burning downward through the floor above the

21

effected joist. Saddle burns display deep charring, and the fire patterns are highly localized and
gently curved.
16. In many incendiary fires, when fuels are intentionally distributed or “trailed” from one area to
another, the elongated patterns may be visible. Such fire patterns, known as “TRAILERS,” can be
found along floors to connect separate fire sets, or up stairways to move fires from one floor or level
within a structure to another. Fuels used for trailers may be ignitable liquids, solids, or combinations
of these.

Extinguishers for Class A Fires.-
✔Multipurpose dry chemical
✔Foam extinguishers
Loaded stream extinguishers
Extinguishers for Class B Fires.-
✔Multipurpose dry chemical
Foam
✔ Carbon dioxide (CO2)
✔ Dry chemicals
Loaded stream extinguishers
✔Bromotrifluoromethane - Halon 1301
Extinguishers for Class C Fires.-
✔ Multipurpose dry chemical
✔ Bromotrifluoromethane - Halon 1301
✔Carbon dioxide (CO2)
Dry chemicals
Extinguishers for Class D Fires.-
Extinguishers or extinguishing agents for class
D fires shall be types approved for use on
the specific combustible metal.
An act that would remove or neutralized a fire hazard.
D. Abatement

???What is the main purpose of fire department pumpers?
A. Supplement other methods of fire control
B. Carry portable equipment to the fire ground.
C. Eliminate the need for outside water sources
D. Provide adequate water pressure for effective fire streams✔
???What NFPA standard contains fire department pumper requirements?
A. NFPA 1021
B. NFPA 1500
C. NFPA 1901 ✔
D. NFPA 1031
???Which statement about initial attack fire apparatus is MOST accurate?
A. They have a large chassis than full-size pumpers.
B. They are the same size as standard full-size pumpers.
C. They have larger agent tank size than full-size pumpers.
D. They may be highly maneuverable and able to respond to incidents where access is limited.✔

22

???When a mobile water supply apparatus is used as a stationary reservoir or "nurse tender," the:
A. water tender is parked far away from the fire scene.
B. water tender is off-loads its water supply into portable tanks.
C. water tender serves as a back-up supply water and is used only in emergencies.
D. pumpers connect to the water tender and use its supply during suppression operations.✔
???Which specialty apparatus is MOST likely to be equipped with ground sweep nozzle for fire
suppression?
A. Wildland fire apparatus✔
B. Trailer-mounted fire pumps
C. Aircraft rescue and fire apparatus
D. Aerial apparatus equipped wit fire pumps
???Which specialty apparatus is MOST likely to be used to provide immediate suppression of flammable
liquid fires and suppression of vapors from fuel spills on airport property?
A. Trailer-mounted fire pumps
B. Aircraft rescue and fire fighting apparatus✔
C. Aerial apparatus equipped with fire pumps
D. Rescue apparatus equipped with fire pumps
???Which specialty fire apparatus is equipped with small fire pumps and tanks to extinguish small fires
and provide protective hoselines at incidents?
A. Trailer-mounted fire pumps
B. Aircraft rescue and fire fighting apparatus
C. Aerial apparatus equipped with fire pumps
D. Rescue apparatus equipped with fire pump✔
???A trailer-mounted fire pump would be MOST likely to be deployed to fires:
A. that require mutual aid.
B. in remote or isolated areas.
C. involving high-rise occupancies.
D. at long-term pumping operations. ✔
???Which electric power generation equipment converts a vehicle's 12- or 24-volt DC current into 110-
or 220- volt AC current in order to supply a small amount of electric power?
A. Inverter ✔
B. Mini-generator
C. Portable generator
D. Vehicle-mounted generator
???Which electric power generation equipment may be operated in the compartment of an apparatus or
carried to a remote location?
A. Inverter
B. Mini-generator
C. Portable generator✔
D. Vehicle-mounted generator

23

Fire Technology And Arson Investigation Reviewer
c riminologists

1 2 :2 0 P M
criminology

Fire Technology and Arson Investigation

3 State of matter

Solid
Liquid
Gas

4 General Categories Of Heat Energy

Chemical Heat Energy
Electrical Heat Energy
Mechanical Heat Energy
Nuclear Heat Energy

Backdraft - a phenomenon in which a fire that has consumed all available
oxygen suddenly explodes when more oxygen is made available, typically
because a door or window has been opened.

Boiling Point - The temperature of a substance where the rate of
evaporation exceeds the rate of condensation.

British Thermal Unit - (BTU) The amount of heat needed to raise the
temperature of one pound of water one degree F.

Calorie - The amount of heat needed to raise the temperature of one
gram of water one degree Centigrade.

Centigrade - (Celcius) On the Centigrade scale, zero is the melting

24

point of ice; 100 degrees is the boiling point of water.

Chemical Heat Energy

Heat of Combustion - The amount of heat generated by the
combustion (oxidation) process.

Heat of Decomposition - The release of heat from decomposing
compounds. These compounds may be unstable and release
their heat very quickly or they may detonate.

Heat of Solution - The heat released by the mixture of matter
in a liquid. Some acids, when dissolved, give off sufficient
heat to pose exposure problems to nearby combustibles.

Spontaneous Heating - The heating of an organic substance
without the addition of external heat. Spontaneous heating
occurs most frequently where sufficient air is not present
to dissipate the heat produced. The speed of a heating
reaction doubles with each 180 F (80 C) temperature increase.

Classification of Fires

Class A Fire - Fires involving ordinary combustible materials,
such as wood, cloth, paper, rubber and many plastics.

Class B Fires - Fires involving flammable liquids, greases
and gases.

Class C Fires - Fires involving energized electrical equipment.

Class D Fires - Fires involving combustible metals, such as
magnesium, titanium, zirconium, sodium and potassium.

25

Class K Fires - Class K is a new classification of fire as
of 1998 and involves fires in combustible cooking fuels such
as vegetable or animal fats.

Combustion - is the self-sustaining process of rapid oxidation of a
fuel being reduced by an oxidizing agent along with the evolution of
heat and light.

Dry Chemicals and Halons - method of fire extinguishment, interrupt
the flame producing chemical reaction, resulting in rapid extinguishment.

Electrical Heat Energy

Dielectric Heating - The heating that results from the action
of either pulsating direct current, or alternating current
at high frequency on a non-conductive material.

Heat from Arcing - Heat released either as a high-temperature
arc or as molten material from the conductor.

Heat Generated by Lightning - The heat generated by the
discharged of thousands of volts from either earth to cloud,
cloud to cloud or from cloud to ground.

Induction Heating - The heating of materials resulting from
an alternating current flow causing a magnetic field influence.

Leakage Current Heating - The heat resulting from imperfect
or improperly insulated electrical materials. This is
particularly evident where the insulation is required to
handle high voltage or loads near maximum capacity.

26

Resistance Heating - The heat generated by passing an
electrical force through a conductor such as a wire or
an appliance.

Static Electricity Heating - Heat released as an arc between
oppositely charged surfaces. Static electricity can be
generated by the contact and separation of charged surfaces
or by fluids flowing through pipes.

Endothermic Heat Reaction - A chemical reaction where a substance
absorbs heat energy.

Exothermic Heat Reaction - A chemical reaction where a substance
gives off heat energy.

Fahrenheit - On the Fahrenheit scale, 32 degrees is the melting point
of ice; 212 degrees is the boiling point of water.

Fire point - The temperature at which a liquid fuel will produce
vapors sufficient to support combustion once ignited. The fire point
is usually a few degrees above the flash point.

Fire Triangle - Oxygen, Fuel, Heat

Fire National Training Institute - (FNTI) the Institution for training
on human resource development of all personnel of the Bureau of Fire
Protection (BFP).

Flame - A gas-phased combustion.

Flammable or Explosive Limit - The percentage of a substance in air

27

that will burn once it is ignited. Most substances have an upper
(too rich) and a lower (too lean) flammable limit.

Flashover - an instance of a fire spreading very rapidly across a gap
because of intense heat. Occurs when a room or other area becomes
heated to the point where flames flash over the entire surface or area.

Flash Point - The minimum temperature at which a liquid fuel gives
off sufficient vapors to form an ignitable mixture with the air near
the surface. At this temperature, the ignited vapors will flash, but
will not continue to burn.

Fuel - is the material or substance being oxidized or burned in the
combustion process. Material such as coal, gas, or oil that is burned
to produce heat or power.

Fuel Removal - method of fire extinguishment, fire is effectively
extinguished by removing the fuel source. This may be accomplished by
stopping the flow of liquid or gaseous fuel or by removing solid fuel
in the path of the fire or allow the fire to burn until all fuel
is consumed.

Glowing Combustion - A condensed phased combustion.

Heat - the quality of being hot; high temperature. A form of energy
arising from the random motion of the molecules of bodies, which
may be transferred by conduction, convection, or radiation.

Heating - is transfer of energy, from a hotter body to a colder one,
other than by work or transfer of matter.

Heat of Combustion - The amount of heat generated by the combustion
(oxidation) process.

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Heat Transfer

Conduction - Conduction is the transfer of energy through
matter from particle to particle. Heat may be conducted from
one body to another by direct contact of the two bodies or
by an intervening heat-conducting medium.

Convection - is the transfer of heat by the actual movement
of the warmed matter. Transfer of heat by the movement of
air or liquid.

Radiation - Electromagnetic waves that directly transport
energy through space.

Ignition Temperature - The minimum temperature to which a fuel in air
must be heated in order to start self-sustained combustion independent
of the heating source.

Heat - The form of energy that raises temperature. Heat is measured
by the amount of work it does.

Heat of Decomposition - The release of heat from decomposing compounds.
These compounds may be unstable and release their heat very quickly or
they may detonate.

Heat of Solution - The heat released by the mixture of matter in a
liquid. Some acids, when dissolved, give off sufficient heat to pose
exposure problems to nearby combustibles.

Mechanical Heat Energy

Frictional Heat - The heat generated by the movement betwee n

29

two objects in contact with each other.

Friction Sparks - The heat generated in the form of sparks
from solid objects striking each other. Most often at least
one of the objects is metal.

Heat of Compression - The heat generated by the forced
reduction of a gaseous volume. Diesel engines ignite fuel
vapor without a spark plug by the use of this principle.

Nuclear Fission and Fusion - The heat generated by either the
splitting or combining of atoms.

Oxidation - The complex chemical reaction of organic material with
oxygen or other oxidizing agents in the formation of more stable
compounds.

Oxidizing Agents - are those materials that yield oxygen or other
oxidizing gases during the course of a chemical reaction.

Oxygen Dilution - is the reduction of the oxygen concentration to
the fire area.

Phases of Fire

Incipient Phase (Growth Stage)
Free-Burning Phase (Fully Developed Stage)
Smoldering Phase (Decay Stage)

Products of Combustion

Fire gases
Flame

30

Heat
Smoke

Pyrolysis (also known as thermalde composition) - is defined as the
chemical decomposition of matter through the action of heat.

RA 6975 - created the BFP.

Bureau of Fire Protection (BFP) - administers and enforces
the fire code of the Philippines. The Fire Bureau shall
have the power to investigate all causes of fires and, if
necessary, file the proper complaints with the city or
provincial prosecutor who has jurisdiction over the case.

Chief of the Fire Bureau - rank is Director.

Deputy Chief for Administration of the Fire Bureau - 2nd
highest officer in the BFP. Rank is Chief Superintendent.

Deputy Chief for Operation of the Fire Bureau - the 3rd
highest officer in the BFP. Rank is Chief Superintendent.

Chief of Directorial Staff of the Fire Bureau - 4th highest
officer in the BFP. Rank is Chief Superintendent.

Directors of the Directorates in the respective national
headquarters office - rank is Senior Superintendent.

Regional Director for Fire Protection - The BFP
shall establish, operate and maintain their respective
regional offices in each of the administrative regions of
the country. Rank is Senior Superintendent.
- He/She shall be respectively assisted by the

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following officers with the rank of superintendent:
Assistant Regional Director for Administration,
Assistant Regional Director for Operations, and
Regional Chief of Directorial Staff.

Assistant Regional Director for Fire Protection - The
assistant heads of the Department's regional offices - rank
is Senior Superintendent.

District Fire Marshall - the heads of the NCR district offices -
rank is Senior Superintendent.

Provincial Fire Marshall - the heads of the provincial offices -
rank is Superintendent.

District Fire Marshall - heads of the district offices - rank
is Chief Inspector.

Chief of Municipal/City Fire Station - (also called City/
Municipal Fire Marshall) - the heads of the municipal or
city stations - rank is Senior Inspector.

Fire Station - at least one in every provincial capital, city
and municipality.

LGU - (Local Government Unit) - shall provide the site of the
Fire Station.

RA 9263 - this Act shall be known as the "Bureau of Fire Protection
and Bureau of Jail Management and Penology Professionalization Act of 2004.

The BFP is headed by a Chief to be assisted by 2 deputy chief, 1
for administration and 1 for operation, all appointed by the

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President upon recommendation of DILG Secretary from among
qualified officers with at least the rank of Senior Superintendent
in the service.

In no case shall any officer who has retired or is retirable
within six (6) months from his/her compulsory retirement age
be appointed as Chief of the Fire Bureau or Chief of the
Jail Bureau.

The Chief of the Fire Bureau and Chief of the Jail Bureau
shall serve a tour of duty not to exceed four (4) years.

The President may extend such tour of duty in times of war
or other national emergency declared by Congress.

RA 9514 - this act shall be known as the fire code of the Philippines
of 2008. An Act establishing a comprehensive fire code of the
Philippines repealing PD 1185 and for other purposes.

Specific Gravity - the density of liquids in relation to water.

Spontaneous Heating - The heating of an organic substance without
the addition of external heat. Spontaneous heating occurs most
frequently where sufficient air is not present to dissipate the
heat produced.

Temperature Reduction - method of extinguishing fire, cooling the fuel
with water to a point where it does not produce sufficient vapor to burn.

Vapor Density - the density of a particular gas or vapor relative
to that of hydrogen at the same pressure and temperature.

33

Definition of Terms Under RA 9514

Abatement - Any act that would remove or neutralize a fire hazard.

Administrator - Any person who acts as agent of the owner and ma nages
the use of a building for him.

Blasting Agent - Any material or mixture consisting of a fuel and
oxidizer used to set off explosives.

Cellulose Nitrate or Nitro Cellulose - A highly combustible and
explosive compound produced by the reaction of nitric acid with a
cellulose material.

Cellulose Nitrate Plastic (Pyroxylin) - Any plastic substance,
materials or compound having cellulose nitrate (nitro cellulose)
as base.

Combustible, Flammable or Inflammable - Descriptive of materials
that are easily set on fire.

Combustible Fiber - Any readily ignitable and free burning fiber such
as cotton, oakum, rags, waste cloth, waste paper, kapok, hay, straw,
Spanish moss, excelsior and other similar materials commonly
used in commerce.

Combustible Liquid - Any liquid having a flash point at or above 37.8
C (100 F).

Corrosive Liquid - Any liquid which causes fire when in contact with
organic matter or with certain chemicals.

34

Curtain Board - A vertical panel of non-combustible or fire resistive
materials attached to and extending below the bottom chord of the roof
trusses, to divide the underside of the roof into separate compartments
so that heat and smoke will be directed upwards to a roof vent.

Cryogenic - Descriptive of any material which by its nature or as a
result of its reaction with other elements produces a rapid drop
in temperature of the immediate surroundings.

Damper - A normally open device installed inside an air duct system
which automatically closes to restrict the passage of smoke or fire.

Distillation - The process of first raising the temperature in separate
the more volatile from the less volatile parts and then cooling and
condensing the resulting vapor so as to produce a nearly purified
substance.

Duct System - A continuous passageway for the transmission of air.

Dust - A finely powdered substance which, when mixed with air in the
proper proportion and ignited will cause an explosion.

Electrical Arc - An extremely hot luminous bridge formed by passage
of an electric current across a space between two conductors or
terminals due to the incandescence of the conducting vapor.

Ember - A hot piece or lump that remains after a material has
partially burned, and is still oxidizing without the manifestation of flames.

Finishes - Materials used as final coating of a surface for ornamental
or protective purposes.

Fire - The active principle of burning, characterized by the heat

35

and light of combustion.

Fire Trap - A building unsafe in case of fire because it will burn
easily or because it lacks adequate exits or fire escapes.

Fire Alarm - Any visual or audible signal produced by a device or
system to warm the occupants of the building or fire fighting
elements of the presence or danger of fire to enable them to
undertake immediate action to save life and property and to suppress
the fire.

Fire Door - A fire resistive door prescribed for openings in fire
separation walls or partitions.

Fire Hazard - Any condition or act which increases or may cause an
increase in the probability of the occurrence of fire, or which
may obstruct, delay, hinder or interfere with fire fighting operations
and the safeguarding of life and property.

Fire Lane - The portion of a roadway or public way that should be kept
opened and unobstructed at all times for the expedient operation of
fire fighting units.

Fire Protective and Fire Safety Device - Any device intended for the
protection of buildings or persons to include but not limited to
built-in protection system such as sprinklers and other automatic
extinguishing system, detectors for heat, smoke and combustion
products and other warning system components, personal protective
equipment such as fire blankets, helmets, fire suits, gloves and other
garments that may be put on or worn by persons to protect themselves
during fire.

Fire Safety Constructions - Refers to design and installation of walls,

36

barriers, doors, windows, vents, means of egress, etc. integral to and
incorporated into a building or structure in order to minimize danger
to life from fire, smoke, fumes or panic before the building is
evacuated. These features are also designed to achieve, among others,
safe and rapid evacuation of people through means of egress sealed
from smoke or fire, the confinement of fire or smoke in the room or
floor of origin and de lay their spread to other parts of the building
by means of smoke sealed and fire resistant doors, walls and floors.
It shall also me an to include the treatment of buildings components
or contents with flame retardant chemicals.

Flash Point - The minimum temperature at which any material gives off
vapor in sufficient concentration to form an ignitable mixture with air.

Forcing - A process where a piece of metal is heated prior to changing
its shape or dimensions.

Fulminate - A kind of stable explosive compound which explodes by
percussion.

Hazardous Opera tion/Process - Any act of manufacturing, fabrication,
conversion, etc., that uses or produces materials which are likely
to cause fires or explosion.

Horizontal Exit - Passageway from one building to another or through
or around a wall in approximately the same floor level.

Hose Box - A box or cabinet where fire hoses, valves and other equipment
are stored and arranged for fire fighting.

Hose Reel - A cylindrical device turning on an axis around which a
fire hose is wound and connected.

37

Hypergolic Fuel - A rocket or liquid propellant which consist of
combinations of fuels and oxidizers which ignite spontaneously on
contact with each other.

Industrial Baking and Drying - The industrial process of subjecting
materials to heat for the purpose of removing solvents or moisture
from the same, and/or to fuse certain chemical salts to form a
uniform glazing the surface of materials being treated.

Jumper - A piece of metal or an electrical conductor used to bypass a
safety device in an electrical system.

Occupancy - The purpose for which a building or portion thereof is
used or intended to be used.

Occupant - Any person actually occupying and using a building or
portions thereof by virtue of a lease contract with the owner or
administrator or by permission or sufferance of the latter.

Organic Peroxide - A strong oxidizing organic compound which
releases oxygen readily. It causes fire when in contact with
combustible materials especially under conditions of high temperature.

Overloading - The use of one or more electrical appliances or devices
which draw or consume electrical current beyond the designed capacity
of the existing electrical system.

Owner - The person who holds the legal right of possession or title
to a building or real property.

Oxidizing Material - A material that readily yields oxygen in
quantities sufficient to stimulate or support combustion.

38

Pressurized Or Forced Draft Burning Equipment - Type or burner where
the fuel is subjected to pressure prior to discharge into the
combustion chamber and/or which includes fans or other provisions for
the introduction of air at above normal atmosphere pressure into the
same combustion chamber.

Public Assembly Building - Any building or structure where fifty (50)
or more people congregate, gather, or assemble for any purpose.

Public Way - Any street, alley or other strip of land unobstructed
from the ground to the sky, deeded, dedicated or otherwise permanently
appropriated for public use.

Pyrophoric - Descriptive of any substance that ignites spontaneously
when exposed to air.

Refining - A process where impurities and/or deleterious materials are
removed from a mixture in order to produce a pure element of compound.
It shall also refer to partial distillation and electrolysis.

Self-Closing Doors - Automatic closing doors that are designed to
confine smoke and heat and delay the spread of fire.

Smelting - Melting or fusing of metallic ores or compounds so as to
separate impurities from pure metals.

Sprinkler System - An integrated network of hydraulically designed
piping installed in a building, structure or area with outlets
arranged in a systematic pattern which automatically discharges water
when activated by heat or combustion products from a fire.

Standpipe System - A system of vertical pipes in a building to which
fire hoses can be attached on each floor, including a system by which

39

water is made available to the outlets as needed.

Vestibule - A passage hall or antechamber between the outer doors
and the interior parts of a house or building.

Vertical Shaft - An enclosed vertical space of passage that extends
from floor to floor, as well as from the base to the top of the
building.

1. What are the four elements of fire tetrahedron?
1

a. Oxygen, fuel, heat and self-sustained chemical chain reaction
b. Air, fuel, heat and self-sustained chemical chain reaction
c. Air, fuel, gas and self-sustained chemical chain reaction
d. Oxygen, wood, heat and self-sustained chemical chain reaction
e. Oxygen, fuel, gas and self-sustained chemical chain reaction

2. It is the transfer of heat by the movement of heated fluids or gases, usually in upward
direction?
2

a. Radiation
b. Convection
c. Conduction
d. Friction
e. Fire

3. Which of the following phrases about the classification of fire is true?
a. The primary mechanism of extinguishment when dealing with Class B fires is cooling
to reduce the temperature of fuel to slow or stop the release of pyrolysis products.
b. Household appliances, computers, transformers, electric motors and overhead
transmission lines are typical sources of Class C fires
3

c. No single agent effectively controls fire in all combustible liquids
d. Either b or c
e. None of the above

4. In the Fire Service, what is Standard Operating Procedure (SOP)?
4

a. SOP is a set of standard methods or rules in which an organization or fire
department operates to carry out a routine function.

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b. SOP is a guide to decision-making within an organization
c. SOP means “obedience to the unenforceable”. In other words, it means doing the
right thing simply because it’s right – not because someone has the power to force
you to do it.
d. SOP refers to both organization’s responsibility to provide the direction needed to
satisfy its identified goals and objectives and individual’s responsibility to follow the
direction given.
e. SOP defines the boundaries within which the administration expects department
personnel to act in specified situations.

5. It is the systematic removal of heated air, smoke, and fire gases from a burning building
and replacing them with cooler air.
5

a. Overhauling
b. Rescue and Extrication
c. Fire Fighting
d. Salvaging
e. Ventilation

6. Which of the following phrases is a sign of a potential backdraft?
a. Pressurized smoke coming from small cracks
b. Smoke puffing at intervals from the building (appearance of breathing)
c. Smoke-stained windows
d. Confinement and excessive heat
e. All of the above

7. RA 9514 is an act establishing a comprehensive fire code of the Philippines repealing
Presidential Decree No. 1185 . The said act is also known as_______________.
6

a. Fire Code of the Philippines of 2008
b. Amended Fire Code of the Philippines of 2008
c. Comprehensive Fire Code of the Philippines of 2008
d. Repealed Fire Code of the Philippines of 2008
e. None of the above

8. It refers to the portion of a roadway or public way that should be kept open and
unobstructed at all times for the expedient conduct of fire fighting operations.
7

a. Fire Escape
b. Fire Lane
c. Fire Exit
d. Fire Protective Assembly
e. Fire Road

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RA 9514, An act establishing a comprehensive fire code of the Philippines repealing Presidential Decree No. 1185
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IRR OF RA 9514, Rule 3, Definition of Terms

41

9. Which of the phrases about Assembly Occupancies is most appropriate?
8

a. Assembly Occupancies include stores, markets, and other rooms buildings, or
structures for the display and/or sale of merchandise.
b. Assembly Occupancies include, but not limited to, all buildings or portions of
buildings used for gathering together of fifty (50) or more persons for such purposes
as deliberation, worship, entertainment, eating, drinking, amusement, awaiting
transportation, or similar uses.
c. Assembly Occupancies include all buildings or structures utilized primarily for
sheltering of goods, merchandise, products, vehicles, or animals.
d. Assembly Occupancies refer to two or more classes of occupancies occurring/
located/situated/ existing in the same building and/or structures so intermingled that
separate safeguards are impracticable.
e. Assembly Occupancies include buildings or structure which cannot be properly
classified in any of the preceding occupancy groups.

10. Which type of occupancy a Gasoline Station belongs?
a. Assembly Occupancy
b. Storage Occupancy
c. Industrial Occupancy
d. Miscellaneous Occupancy
e. Mercantile Occupancy

11. Fire extinguisher recommended for the protection of delicate electronic equipment.
a. Water based type
b. Halogenated agent type
c. Multi-purpose dry chemical type
d. Wet chemical type
e. None of the above

12. How many days should the BFP act on an application for fire safety evaluation
clearance?
9

a. Minimum of 3 Working days
b. Minimum of 4 Working days
c. Minimum of 5 Working days
d. Minimum of 10 working days
e. Minimum of 15 working days

13. It refers to an act that would remove or neutralize a fire hazard.
a. Fire Safety Inspection
10

b. Abatement

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IRR OF RA 9514, Rule 3, Division 3. Classification of Occupancy
9
BFP citizens Charter, Service Standard
10
Republic of Act No. 9514, Section 3. Definition of Terms

42

c. Issuance of Notice to Comply
d. Stoppage or Closure
e. None of the above

14. Which among the following is a mandate of Bureau of Fire Protection?
a. Fire Prevention
b. Fire Suppression
c. Fire and Arson Investigation
d. Emergency and Medical Rescue Services
e. All of the above

15. Which among the following is considered prohibited acts under the fire code of the
Philippines of 2008?
11

a. Conduct of fire safety inspection
b. Smoking in a designated smoking area
c. Giving false or malicious fire alarms
d. Use of fire protective or firefighting equipment of the fire service other than for
fighting except in other emergencies where their use are justified
e. Both C & D

16. Which among the following is a classification of occupancy under the Fire Code of the
Philippines?
12

a. Assembly
b. Hotel
c. School
d. Department Store
e. Pension House

17. It refers to alarm initiating device designed to actuate when visible or invisible products
of combustion are present in the room or space where the unit is installed?
13

a. Fire Alarm
b. Smoke Alarm
c. Smoke Detector
d. Sprinkler
e. Flame Detector

18. Which of the following statement is true about the effect of sprinkler systems on Life
Safety?
14

a. Preventing fire spread upwards in multistory buildings

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43

b. Fires are too small to activate the sprinkler system
c. Smoke generation reaches occupants before the sprinkler system activates
d. Facilitating evacuation by increasing air pressure in stairwells to exclude smoke
e. All of the above

19. It refers to a condition that increases the likelihood of a fire starting or would increase
the extent or severity of a fire if one did start.
15

a. Fire trap
b. Fire hazard
c. Fire emergency
d. Back draft
e. Combustion

20. Which of the following statement about Nuclear Heat Energy is true?
16

a. Heat that is created by fission
b. Poorly maintained electrical appliances, exposed wiring, and lighting are sources of
electrical heat sources
c. Moving parts on machines, such as belts and bearings, are a source of mechanical
heating
d. Materials may come in contact with each other and react, or they may decompose
and generate heat.
e. All of the above

21. Who is responsible for the maintenance of fire extinguisher and fire protection equipment
installed in a building?
17

a. Fire Safety Inspector
b. Dealer of Fire Extinguisher
c. Fire Safety Practitioner
d. Owner/Administrator of the building
e. Fire Marshal

22. Which of the following statement is true about eminent danger?
18

a. A secondary exit is not present
b. Insufficient exit width
c. Absence of fire-resistive enclosure for main and secondary exits
d. Absence of standpipe system
e. Absence of automatic fire suppression system

23. Which of the following refers to the fee charged for the conduct of fire safety inspection
equivalent to ten percentum (10%) of all fees charged by the building official, or by the

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IRR of RA 9514. Section 13.0.0.0. Public Nuisance

44

local government or by other government agencies concerned in the granting of
pertinent permits or licenses?
19

a. Fire Code Construction Tax
b. Fire Code Realty Tax
c. Fire Code Premium Tax
d. Fire Safety Inspection Fee
e. Fire Safety Inspection Certificate

24. What is the standard form issued by the BFP local offices/fire stations to be filled-up by
the applicant which indicates the basic information of building, facilities or structures
and/or establishment?
20

a. Inspection Order
b. After Inspection Report
c. Fire Safety Checklist
d. Application Form
e. Notice to Comply

25. A letter issued by the BFP local offices/ fire stations to the owner/administrator of
buildings, facilities or structure and/or establishment indicating the defects, deficiencies,
violations of the buildings/establishments and the period to comply pursuant to the
provisions of the fire code of the Philippines of 2008.
21

a. Notice to Correct Violation
b. Notice to Comply
c. Fire Safety Checklist
d. After Inspection Report
e. Abatement Order

26. It refers to fire-rated wall with specified degree or fire resistance, built of fire-resistive
materials and usually extending from the foundation up to and through the roof a
building, that is designed to limit the spread of a fire within a structure or between
adjacent structures.
22

a. Fire Wall
b. Fire Door
c. Veneer Wall
d. Cantilever Walls
e. None of the above

27. Which of the following statement is true about class A fire?
23

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45

a. It involves flammable and combustible liquids and gases
b. It involves energized electrical equipment
c. It involves ordinary combustible materials such as wood, cloth, paper, rubber, grass
and many plastics
d. It involves combustible metals such as aluminum, magnesium, potassium, sodium,
titanium and zirconium
e. It involves oils and greases normally found in commercial kitchens and food
preparation facilities using deep fryers.

28. Refers to a portable fire fighting device designed to combat incipient fires?
24

a. Fire Extinguisher
b. Fire Truck
c. SCBA
d. Personnel protective equipment
e. Fire coat

29. What is AFFF extinguisher stands for?
a. Aqueous Film Forming Foam
b. Aqueous Firm Forming Foam
c. Aqueous Film Firming Foam
d. Aqueous Firm Filming Foam
e. Aqueous Firm Flaming Foam
30. How much is the Fire Code Construction Tax to be paid by Mr Ma Goo Lhang who’s
building to be erected cost 5 Billion pesos as indicated in its Bill of Materials?
25

a. 5 Million pesos
b. 500,000 pesos
c. 50,000 pesos
d. 5,000 pesos
e. 500 pesos

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46

FIRE TECHNOLOGY AND ARSON INVESTIGATION

Introduction:

The development of methods and tools for using and controlling fire was critical in human
evolution and is believed to have allowed early humans to spread northward from the warm climate of
either origin into the more severe environment of Europe and Asia. The evidence of early fire use is
often ambiguous because of the difficulty in determining whether the archeological evidence is the
result of accidental fire or its deliberate use. Such evidence include finds of occupation sites with fired or
baked soils, bones or stones that have been changed through the application of heat, and areas
containing thick layers of ash and charcoal that might have hearth structures.
The earliest finds, in Kenya and Ethiopia, date from about 1.5 million years ago. Less equivocal evidence
exists for deliberate fire use in the Paleolithic period, beginning about 500,000 years ago. Neolithic sites
have yielded objects that may have been used in fire, making drill for producing friction, heat in wood
and flints for striking sparks from iron pyrites.
In legend and religion, fire is common thing. For example, in Persian literature fire was discovered during
a fight of a hero with a dragon. A stone that the hero used as a weapon missed the monster and struck a
rock. Light shone forth and human beings saw fire for the first time. In Greek mythology, Prometheus
was bestowed with god like powers when he stole the god’s fire to give it to humanity. Fire has also
played a central role in religion. It has been used as a god and recognized as a symbol of home and
family in many cultures. Fire has also been a symbol of purification and of immortality and renewal,
hence the lighting of flames of remembrance. The Temple of Vesta in Rome was an outstanding example
of the importance of fire to the Romans. Vesta was originally the goddess of the fire and her shrine was
in every home.
We can only guess that pre-historic people may have gained knowledge of fire from observing things in
nature. So the origin of fire before the dawn of civilization may be traced to an erupting volcano, or a

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forest fire, started by lighting. No one really knows where on the earth surface or at what stage of early
history man learned how to start a fire and how to make use of it. Yet, today, man has had fire as:

• source of warmth and light
• protection against enemies
• cause chemical changes to foodstuffs to suit man’s body structure
• provides processes for modifying chemicals into medicines
• provides heat to convert wood, metals, and bones into domestic tools or instruments for
aggression

While the application of fire has served man’s needs its careless and wanton use exact an enormous and
dreadful toll from society in life and property. Hence, man’s understanding of fire would enable him to
develop the technology of prevention and control to a considerable advance state (Abis).

WHAT IS FIRE?

Fire is the manifestation of rapid chemical reaction occurring between fuel and an oxidizer-
typically the oxygen in the air. Such rapid chemical reaction releases energy in the form of heat and
light.
Fire is heat and light resulting from the rapid combination of oxygen, or in some cases gaseous chlorine,
with other materials. The light is in the form of a flame, which is composed of glowing particles of the
burning material and certain gaseous products that are luminous at the temperature of the burning
material.

THE START OF FIRE

All matters exist of one of the three states – solid, liquid and gas (vapor). The atoms or
molecules of a solid are packed closely together, and that of a liquid is packed loosely, the molecules of
a vapor are not packed together at all, they are free to move about. In order for a substance to oxidize,
its molecules must be pretty well surrounded by oxygen molecules. The molecules of solids or liquids are
too tightly packed to be surrounded. Thus, only vapors can burn.
However, when a solid or a liquid is heated, its molecules move about rapidly. If enough heat is applied,
some molecules break away from the surface to form a vapor just above the substance. This vapor
can now mixed with oxygen. If there is enough heat to raise the vapor to its ignition temperature

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(temperature needed to burn), and if there is enough oxygen present, the vapor will oxidize rapidly – it
will start to burn.

The start of burning is the start of a Chain Reaction (the burning process). Vapor from heated
fuel rises, mixes with air and burns. It produces enough heat to release more vapor and to draw in air to
burn that vapor. As more vapor burns, flame production increases. More heat is produced, more vapor
released, more air drawn into the flames and more vapor burns, the chain reaction keeps increasing –
the size of the fire increases until fuel is consumed.

CHEMISTRY OF FIRE

Obviously, three things are required for combustion or fire: FUEL (Combustible materials to
vaporize and burn), OXYGEN (Oxygen in air is the common oxidizing agent, to combine with fuel vapor,
air contains 28% O, 78 N, 1% inert gas), and HEAT (to raise the temperature of the fuel vapor to its
ignition temperature). The combinations of these three elements form the so-called Fire Triangle.

The Fire Triangle

Oxygen Heat

Fuel

Figure 1

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Figure 1 will show that if any side of the fire triangle is missing, a fire can not start or if any side of the
fire triangle is removed, the fire will go off.

With the presence of the elements of fire, combustion may take place. Before a fuel will burn, it must be
changed to its vapor state. In a fire situation, this change usually results from the initial application of
heat. The process is known as PYROLYSIS. Pyrolysis (also known as thermal decomposition) is defined as
the “chemical decomposition of matter through the action of heat”. In this case, the decomposition
causes a change from a solid state to vapor state. If the vapor mixes sufficiently with air and heated to
high temperature, combustion results.

The combustion process is better represented by the fire tetrahedron.

The Fire Tetrahedron

Oxygen Heat

Fuel Chain Reaction

Figure 2

The fire tetrahedron is useful in illustrating and remembering the combustion process because it has
room for the chain reaction and because each face touches the other three faces.
The basic difference between the fire triangle and the fire tetrahedron is that: The tetrahedron
illustrates how flaming combustion is supported and sustained through the chain reaction. In this sense,
the chain reaction face keeps the other three faces from falling apart.

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The fire tetrahedron also explains the flaming mode of combustion. The modes of combustion are either
Flaming mode or Surface mode (Glowing– represented by the fire triangle).
A condensed phased combustion is called glowing combustion
A gas-phased combustion is known as flame
If the process is confined with pressure it is called explosion
If combustion propagates at supersonic speed, it produced a detonation

PROPERTIES OF FIRE

A. The Physical properties

1. Specific Gravity – the ratio of the weight of a solid or liquid substance to the weight of an equal
volume of water.
2. Vapor density – the weight of a volume of pure gas composed to the volume of dry air at the
same temperature and pressure.
3. Vapor Pressure – the force exerted by the molecules on the surface of a liquid.
4. Temperature – the measure of the degree of thermal agitation of molecules.
5. Boiling Point – the constant temperature at which the vapor pressure of the liquid is equal to
the atmospheric pressure.
6. Ignition/Kindling temperature – the minimum temperature at which the substance must be
heated in order to initiate combustion.
7. Fire point – the lowest temperature of a liquid in an open container at which vapors are evolved
fast enough to support combustion.
8. Flash point – the temperature at which a flammable liquid forms a vapor-air mixture that ignites
(mixture with in the explosive range).

To burn a fuel (combustible material), its temperature must be raised until ignition point is reached.
Thus, before a fuel start to burn or before it can be ignited, it has to be exposed to a certain degree of
temperature. When the temperature of a certain substance is very high, it releases highly combustible
vapors known as FREE RADICALS (combustible vapors such as hydrogen gas, carbon monoxide, carbon
dioxide, and nitrogen).

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During the process of pyrolysis, the following are involved:

• the fuel is heated until its temperature reaches its fire point,
• decomposition takes place – moisture in the fuel is converted to vapor,
• decomposition produces combustible vapors that rise to the surface of the fuel (free radicals)
• free radicals undergo combustion.

B. The Chemical Properties

1. Endothermic Reactions – changes whereby energy (heat) is absorbed or is added before the
reaction takes place.
2. Exothermic Reactions – those that release or give off energy (heat) thus they produce
substances with less energy than the reactants.
3. Oxidation – a chemical change that is exothermic, a change in which combustible material (fuel)
and an oxidizing agent (air), react. Example of oxidation is combustion which is the same as actual
burning (rapid oxidation)
4. Flames – flames are incandescent (very bright/glowing with intense heat) gases. It is a
combustion product and a manifestation of fire when it is in its gas-phased combustion.

Types of Flames:

a. Based on Color and Completeness of Combustibility of Fuel
1. Luminous Flame – is orange-red, deposit soot at the bottom of a vessel being heated due to
incomplete combustion and has a low temperature.
2. Non-Luminous Flame – is blue, there is complete combustion of fuel and has relatively high
temperature.

b. Based on Fuel and Air Mixture
1. Premixed Flame – is exemplified by a Bunsen-type laboratory burner where hydrocarbon (any
substance containing primarily carbon and hydrogen) is thoroughly mixed with air before reaching the
flame zone.

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2. Diffusion Flame – is observed when gas (fuel) alone is forced through a nozzle into the
atmosphere which diffuse in the surrounding atmosphere in order to form a flammable mixture. The
candle flame is an example of diffusion flame governed purely by molecular diffusion, and the flame of
the oxyacetylene torch. (diffused – dispersed, widely spread)

c. Based on Smoothness
1. Laminar Flame – when a particle follows a smooth path through a gaseous flame.
2. Turbulent Flame – are those having unsteady, irregular flows. As physical size, gas density or
velocity is increased, all laminar gas flows tend to become turbulent.

FIRE ELEMENTS

As mentioned in part one, fire has been described as having three components: fuel, heat, and
oxygen. This triad was illustrated by the fire triangle, which symbolized, in the most basic terms, a
chemical relationship. The additional component needed to explain flaming combustion is a chemical
chain reaction shown in the fire tetrahedron.

THE FUELS

FUELS (Combustible Materials)– fuel is matter and matter exist in three physical states: solid, liquid and
gas. Solids melt to become liquids, and these may vaporize and become gases. The basic rule is that at
high enough temperature all fuels can be converted to gases. And each of the physical states exhibits
different physical and chemical properties that directly affect a fuel’s combustibility. For example,
gasoline as a liquid does not burn, it is the vapors rising from the liquid that burn. Likewise, wood, the
most common solid fuel, is not flammable, but gives of flammable vapors (free radicals).
FUEL is also a material that provides useful energy. Fuels are used to heat and cook food, power
engines, and produce electricity. Some fuels occur naturally and others are artificially created. Such
natural fuels are coals, petroleum, and natural gases obtained from underground deposits that were
formed million years ago from the remains of plants and animals. They are called fossil fuels, which
account for about 90% of the energy people use today.
Synthetic fuels can be made from fossil fuels, certain types of rock and sand, and biomass.
Most fuels release energy by burning with oxygen in the air. But some – especially chemical fuels used in
rockets – need special oxidizers in order to burn. Nuclear fuels do not burn but release energy through
the fission (splitting) of fusion (joining together) of atoms.

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Classification of Combustible Materials

1. Class A Fuels – they are ordinary combustible materials that are usually made of organic
substances such as wood and wood-based products. It includes some synthetic or inorganic materials
like rubber, leather, and plastic products.
2. Class B Fuels – materials that are in the form of flammable liquids such as alcohol, acidic
solutions, oil, liquid petroleum products, etc.
3. Class C Fuels – they are normally fire resistant materials such as materials used on electrical
wiring and other electrical appliances.
4. Class D Fuels – they are combustible metallic substances such as magnesium, titanium,
zirconium, sodium and potassium.

General Categories of Fuel

1. Solid Combustible Materials – includes organic and inorganic, natural or synthetic, and metallic
solid materials.
2. Liquid Combustible Materials – includes all flammable liquid fuels and chemicals.
3. Gaseous Substances – includes those toxic/hazardous gases that are capable of ignition.

The Solid Fuels

The most obvious solid fuels are wood, paper and cloth. Its burning rate depends on its configuration.
For example, solid fuels in the form of dust will burn faster than bulky materials.

Types of Flammable solids

a. Pyrolyzable solid fuels – include many of the ordinary accepted combustibles: wood, paper
and so on. The vapors released by their chemical decomposition support flaming combustion. This
exemplifies a gas-to-gas reaction: the vapors released mixed with oxygen in the air to produce a flame.
b. Non-pyrolyzable solid fuels – solid fuels that are difficult to ignite. A common example is
charcoal. Chemical decomposition does not occur because there are no pyrolyzable elements present.
No vapors are released. The glowing combustion that results is an example of a gas-to-solid reaction.

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The following are group of solid fuels:

1. Biomass – it is the name given to such replaceable organic matters like wood, garbage and animal
manure that can be use to produce energy. For example, heat produced by burning nutshells, rice and
oat hulls, and other by-products of food processing. They are often used to operate plant equipment.

Factors affecting the combustibility of wood and wood-based products

a. Physical form – the smaller the piece of wood, the easier it is to burn.
b. Moisture content (water content) – the freshly cut wood is more difficult to ignite and burn than
dry wood.
c. Heat conductivity - a poor conductor of heat takes a longer time to ignite than those materials
that are good conductors of heat.
d. Rate and period of heating – less flammable materials don’t easily ignite and needs direct
contact with flame than highly combustible materials.
e. Rate of combustion – with an unlimited supply of oxygen, the rate of burns increases, more heat
is produced and fuel is consumed more completely.
f. Ignition temperature – the higher the temperature, the faster it reaches ignition point and it
varies depending on the other factors above.

2. Fabrics and Textiles – almost all fibers and textiles are combustible. A fiber is a very fine thin strand or
thread like object. Fabrics are twisted or woven fibers. And textiles are machine woven or knitted fabric.

Classification of Fibers

a. Natural Fibers – they come from plants (Coir – coconut fiber, Cotton – seed fiber, pulp – wood
fiber) , from animals (wool, silk, protein fibers – leather), from minerals (asbestos)
b. Synthetic/Artificial Fibers – organic fibers, cellulose fibers, cellulose acetate, non-cellulose, and
inorganic fibers like fiber glass, steel

Factors affecting the combustibility of fibers

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a. Chemical composition – natural and synthetic organic fibers are generally highly combustible
materials especially if they are dry. Mineral fibers and synthetic inorganic fibers are normally fire
resistant materials.
b. Fiber finish or coating – fiber coating combined with organic fibers are supportive to continued
burning of fabric.
c. Fabric weight – the heavier the fabric, the greater its resistance to ignition, thus delaying its
ignition.
d. Tightness of weave – the closer the fiber are woven, the smaller the space it contains, thus it
takes a longer period to ignite it.
e. Flame retardant treatment – fabric treated with flame retardant have higher resistance to
ignition.

Fabric Ignition

Limiting Oxygen Index (LOI) is a numerical basis of measuring the tendency of a fabric to continuously
burn once source of ignition is removed. If the LOI of a fabric is high, the probability that it will cease to
burn once the flame is removed is also high. Fabrics with high LOI and high ignition temperature are
safer for clothing and furnishing because they do not ignite easily. Also, they do not continue burning
after the source of heat or flame is removed.

3. Plastics – plastics are included as ordinary fuels under class A except those materials of or containing
cellulose nitrate. Cellulose Nitrate is a chemical powder used in bombs, they are also called pyroxylin.

Plastics comprise a group of materials consisting mainly of organic substances or high molecular
substances. They are solid in the finished state although at some stage of manufacture plastics can be
made to flow into a desired shape, usually through the application of heat or pressure or both.

4. Coal – a black, combustible, mineral solid resulting from the partial decomposition of matter under
varying degrees of temperature. They are used as fuels in the production of coal gas, water gas, and
many coal compounds. They are also used to heat buildings and to provide energy for industrial
machinery.

The forms of coal are lignite or brown coal, sub-bituminous coal, bituminous coal, anthracite.
Bituminous coal is the most plentiful and important coal used by industry. It contains more carbon and

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produces more heat than either lignite or sub-bituminous coal. It is also the coal best suited for making
coke. Antracite is the least plentiful and hardest coal. It contains more carbon and produces more heat
than other coals. However, antracite is difficult to ignite and burns slowly.

5. Peat – It is partially decayed plant matter found in swamps called bags and used as a fuel chiefly in
areas where coal and oil are scarce. In Ireland and Scotland, for example, peat is cut formed in blocks,
and dried; the dried bloks are then burned to heat homes.

The Liquid Fuels

Liquid fuels are mainly made from Petroleum, but some synthetic liquids are also produced.
Petroleum is also called crude oil. They may be refined to produce gasoline, diesel oil, and kerosene.
Other fuel oils obtained by refining petroleum to distillate oil and residual oils. Distillate oils are
light oils, which are used chiefly to heat homes and small buildings. Residual oils are heavy, and used to
provide energy to power utilities, factories and large ships.
Oil-based paint products are also highly flammable liquids.
In the process of vaporization, flammable liquids release vapor in much the same way as solid
fuels. The rate of vapor is greater for liquids than solids, since liquids have less closely packed molecules.
In addition, liquids can release vapor over a wide range, example, gasoline starts to give vapor at –40C
(-45 F).
This makes gasoline a continuous fire hazard; it produces flammable vapor at normal temperature.

General Characteristics of Liquids

1. They are matters with definite volume but no definite shape.
2. They assume the shape of their vessel because there is free movement of molecules.
3. They are slightly compressible. They are not capable of indefinite expansion, unlike gas.

2 General Groups of Liquid Fuels

1. Flammable liquids – they are liquids having a flash point of 37.8 C (100F) and a vapor
pressure not exceeding 40 psia (2068.6 um) at 37.8 C.
2. Combustible Liquids – these liquids have flash point at or above 37.8 C (100F).

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Burning Characteristics of Liquids

Since it is the vapors from the flammable liquid which burn, the case of ignition as well as the rate of
burning can be related to the physical properties such as vapor pressure, flash point, boiling point, and
evaporation rate.

1. Liquids having vapors in the flammable range above the liquid surface at the stored temperature
have rapid rate of flame propagation.
2. Liquids having flash points above stored temperature have slower rate of flame propagation.
The chemical explanation is, it is necessary for the fire to heat sufficiently the liquid surface to form
flammable vapor-air moisture before the flame will spread through the vapor.

Factors affecting the Rate of Flame Propagation
and Burning of Liquids

• wind velocity - temperature - heat of combustion - latent heat of evaporation - atmospheric
pressure

Latent heat is the quantity of heat absorbed by a substance from a solid to a liquid and from a liquid to
gas. Conversely, heat is released during conversion of a gas to liquid or liquid to a solid.

The Gas Fuels

Gaseous fuels are those in which molecules are in rapid movement and random motion. They
have no definite shape or volume, and assume the shape and volume of their container.

There are both natural and manufactured flammable gases. Gas fuels flow easily through pipes and are
used to provide energy for homes, businesses, and industries. Examples of gas fuels are acetylene,
propane, and butanes.

Some properties of gas fuels are:

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• compressibility – expandability - permeability (open to passage or penetration) - diffusion
(intermingling of molecules)

Compressibility and expandability refer to the potential in changes in volume. Diffusion is the uniform
distribution of molecules of one substance through those of another. Permeability means that other
substances may pass through or permeate a gas.

Characteristics of Gas Fuels

1. They are matters that have no definite shape.
2. They are composed of very tiny particles (molecules) at constant random motion in a straight
line
3. Gas molecules collide against one another and against the wall of the container and are
relatively far from one another.

Classification of Gases:

1. Based on Source

a. Natural Gas – the gas used to heat buildings, cook food, and provides energy for industries. It
consists chiefly of methane, a colorless and odorless gas. Natural gas is usually mixed with compounds
of foul-smelling elements like sulfur so gas leaks can be detected.

Butane and propane, which make up a small proportion of natural gas, become liquids when placed
under large amount of pressure. When pressure is released, they change back to gas. Such fuels, often
called Liquefied Petroleum Gas (LPG) or liquefied Natural Gas (LNG), are easily stored and shipped as
liquid.

b. Manufactured Gas – this gas like synthetic liquid fuels is used chiefly where certain fuels are
abundant and others are scarce. Coal, petroleum, and biomass can all be converted to gas through
heating and various chemical procedures.

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2. According to Physical Properties

a. Compressed Gas – gas in which at all normal temperature inside its container; exist solely in the
gaseous state under pressure. The pressure depends on the pressure to which the container is originally
charged and how much gas remains in the container. However, temperature affects the volume and
pressure of the gas.
b. Liquefied Gas – gas, which, at normal temperature inside its container, exist partly in the liquid
state and partly in gaseous state and under pressure as long as any liquid remains in the container. The
pressure basically depends on the temperature of the liquid although the amount of liquid also affects
the pressure under some condition. A liquefied gas exhibits a more complicated behavior as the result of
heating.
c. Cryogenic Gas – a liquefied gas which exist in its container at temperature far below normal
atmospheric temperature, usually slightly above its boiling point and correspondingly low to moderate
pressure. Examples of this gas are air, carbon monoxide, ethylene, fluorine, helium, hydrogen, methane,
nitrogen, and oxygen.

3. According to Usage

a. Fuel Gases – flammable gases usually used for burning with air to produce heat, utilize as power,
light, comfort, and process. Most commonly used gases are natural gas and the LPG (butane and
propane).
b. Industrial Gases - This group includes a large number of gases used for industrial processes as
those in welding and cutting (oxygen, acetylene); refrigeration (freon, ammonia, sulfur dioxide);
chemical processing (hydrogen, nitrogen, ammonia, chlorine); water treatment (chlorine, fluorine).
c. Medical Gases – those used for treatment such as anesthesia (chloroform, nitrous oxide);
respiratory therapy (oxygen).

Burning of Gaseous Fuels

Gaseous fuels are already in the required Vapor State. Only the proper intermixed with oxygen and
sufficient heat is needed for ignition. Gases like flammable liquids, always produce a visible flame, they
do not smolder.

Chemical Fuels

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Chemical fuels, which are produced in solid and liquid form, create great amounts of heat and power.
They are used chiefly in rocket engines. Chemical rocket propellants consist of both a fuel and an
oxidizer. A common rocket fuel is the chemical hydrazine. The oxidizer is a substance, such as nitrogen
tetroxide, that contains oxygen. When the propellant is ignited, the oxidizer provides the oxygen the
fuel needs to burn. Chemical fuels are also used in some racing cars.

Nuclear Fuels

Nuclear fuels provide energy through the fission or fusion of their atoms. Uranium is the most
commonly used nuclear fuel, though plutonium also provides nuclear energy. When the atoms of these
elements undergo fission, they release tremendous amounts of heat. Nuclear fuels are used mainly to
generate electricity. They also power some submarines and ships. Nuclear energy can also be produced
through the fusion of hydrogen atoms.

• Nuclear Fission – split of the nucleus of atoms
• Nuclear Fusion – combination of two light nuclei of atom

THE HEAT ELEMENT

HEAT – It is the energy possessed by a material or substance due to molecular activity.

In physics, heat is the transfer of energy from one part of a substance to another or from one
body to another by virtue of a difference in temperature. Heat is energy in transit; it always flows from
substance at a higher temperature to the substance at a lower temperature, raising the temperature of
the latter and lowering that of the former substance, provided the volume of the bodies remains
constant. Heat does not flow from lower to a higher temperature unless another form of energy transfer
work is always present.
The study of energy is rooted in the subject of thermodynamics, a very logical science that
carefully defines energy, heat, temperature and other properties.
Heat is thermal energy in motion that travels from a hot to a cold region. Thermal energy is a
property of matter directly associated with the concept of temperature.

Heat and Temperature

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Heat should not be confused with temperature, which is the measurement of the relative
amount of heat energy contained with in a given substance. Temperature is an intensity measurement,
with units in degrees on the Celsius (centigrade), Fahrenheit, or Kelvin scales. Heat is the measurement
of quantity and is given in British thermal units (Btu). One Btu is the amount of heat required to raise
one pound of water one degree Fahrenheit:

1 Btu heats 1 lb of water 1 F
1 gallon of water weighs 8.33 lb
8.33 Btu heat 1 gallon of water 1 F

Temperature is the measurement of the degree of thermal agitation of molecules; the hotness
or coldness of something. Thermometer is the instrument used to measure temperature and commonly
expressed in C, F, and K.
Although it is very easy to compare the relative temperatures of two substances by the sense of
touch, it is impossible to evaluate the absolute magnitude of the temperature by subjective reactions.
Adding heat to a substance, however, not only raises its temperature, causing it to impart a more acute
sensation of warmth, but also produces alterations in several physical properties, which may be
measured with precision.

Specific Heat

The heat capacity or the measure of the amount of heat required raising the temperature of a unit mass
of a substance one-degree. If the heating process occurs while the substance is maintained at a constant
volume or is subjected to a constant pressure the measure is referred to as a specific heat at constant
volume.

Latent Heat

A number of physical changes are associated with the change of temperature of a substance.
Almost all substances expand in volume when heated and contract when cooled. The behavior of water
between 0 and 4C (32 and 39 F) constitutes an important exemption to this rule. The phase of a
substance refers to its occurrence as a solid, liquid, or gas, and phase changes in pure substances occur
at definite temperatures and pressures. The process of changing from solid to gas is referred to as
SUBLIMATION, from solid to liquid as melting and from liquid to vapor as VAPORIZATION. If the pressure

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is constant, the process occurs at constant temperature. The amount of heat to produce a change of
phase is called LATENT HEAT, and hence, latent heats of sublimation, melting and vaporization exist. If
water is boiled in an open vessel at a pressure of 1 atm, the temperature does not rise above 100C
(212F), no matter how much heat is added. For example, the heat that is absorbed without changing
the temperature of the water is the latent heat, it is not lost but expended in changing the water to
steam and is then stored as energy in the steam, it is again released when the steam is condensed to
form water (Condensation). Similarly, if the mixture of water and ice in a glass is heated, its temperature
will not change until all the ice is melted. The latent heat absorbed is used up in overcoming the forces
holding the particles of ice together and is stored as energy in the water.

Temperature Scales

Five different temperature scales are in use today, they are:

1. Celsius – it has a freezing point of 0C and a boiling point of 100C. It is widely used through
out the world, particularly for scientific works.
2. Fahrenheit – it is used mostly in English-speaking countries for purposes other than scientific
works and based on the mercury thermometer. In this scale, the freezing point of water is 32F and the
boiling point is 212 F.
3. Kelvin or Absolute – it is the most commonly used thermodynamic temperature scale. Zero is
defined as absolute zero of temperature, that is, - 273.15 c, or –459.67 F.
4. Rankine – is another temperature scale employing absolute zero as its lowest point in which
each degree of temperature is equivalent to one degree on the Fahrenheit scale. The freezing point of
water under this scale is 492 R and the boiling point is 672 R.
5. International Temperature Scale – In 1933, scientist of 31 nations adopted a new international
temperature scale with additional fixed temperature points, based on the Kelvin scale and
thermodynamic principles. The international scale is based on the property of electrical resistively, with
platinum wire as the standard for temperature between –190 and 660C.
Heat Production

There are five ways to produce heat:

1. Chemical – chemically produced heat is the result of rapid oxidation.
2. Mechanical – mechanical heat is the product of friction. The rubbing of two sticks together to
generate enough heat is an example.

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3. Electrical – electrical heat is the product of arcing, shorting or other electrical malfunction. Poor
wire connections, too much resistance, a loose ground, and too much current flowing through an
improperly sized wire are other sources of electrical heat.
4. Compressed gas – when a gas is compressed, its molecular activity is greatly increased
producing heat.
5. Nuclear – Nuclear energy is the product of the splitting or fusing of atomic particles (Fission or
fusion respectively). The tremendous heat energy in a nuclear power plant produces steam to turn
steam turbines.

Heat Transfer

The physical methods by which energy in the form of heat can be transferred between bodies are
conduction and radiation. A third method, which also involves the motion of matter, is called
convection.

Hence, there are three ways to transfer heat: Conduction, Convection, and Radiation.

Conduction – it is the transfer of heats by molecular activity with in a material or medium, usually a
solid. Direct contact is the underlying factor in conduction. Example, if you touch a hot stove, the pain
you feel is a first result of conducted heat passing from the stove directly to your hand. In a structural
fire, superheated pipes, steel girders, and other structural members such as walls and floors may
conduct enough heat to initiate fires in other areas of the structure.

Convection – it is the transfer of heat through a circulating medium, usually air or liquid. Heat transfer
by convection is chiefly responsible for the spread of fire in structures. The supper-heated gases evolved
from a fire are lighter than air, and consequently rise, they can and do initiate additional damage. In
large fires, the high fireball that accompanies the incident is referred to as a firestorm and is an example
of convected heat.

Radiation – radiated heat moves in wave and rays much like sunlight. Radiated heat travels the speed, as
does visible light: 186,000 miles per second. It is primarily responsible for the exposure hazards that
develop and exist during a fire. Heat waves travel in a direct or straight line from their source until they
strike an object. The heat that collects on the surface of the object or building in the path of the heat
waves is subsequently absorbed into its mass through conduction.

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Conduction requires physical contact between bodies or portions of bodies exchanging heat, but
radiation does not require contact or the presence of any matter between the bodies. Convection
occurs when a liquid or gas is in contact with a solid body at a different temperature and is always
accompanied by the motion of the liquid or gas. The science dealing with the transfer of heat between
bodies is called heat transfer.

Oxidizing Agent (Oxygen): The 3rd Element

Oxygen as defined earlier is a colorless, odorless, tasteless, gaseous chemical element, the most
abundant of all elements: it occurs free in the atmosphere, forming one fifth of its volume, and in
combination in water, sandstone, limestone, etc.; it is very active, being able to combine with nearly all
other elements, and is essential to life processes and to combustion.

The common oxidizing agent is oxygen present in air. Air composes 21% oxygen, 78% nitrogen, and 1 %
inert gas (principally Argon). 21% normal oxygen is needed to produce fire in the presence of fuel and
heat. 12% oxygen is insufficient to produce fire, 14-15% oxygen can support flash point, and 16-21%
oxygen can support fire point.

FIRE BEHAVIOR, CAUSES AND CLASSIFICATION

The behavior of fire maybe understood by considering the principle of thermal balance and
thermal imbalance.

Thermal Balance refers to the rising movement or the pattern of fire, the normal behavior when
the pattern is undisturbed. Thermal imbalance, on the other hand is the abnormal movement of fire due
to the interference of foreign matter. Thermal imbalance often confuses the fire investigator in
determining the exact point where the fire originated.

Dangerous Behavior of Fire

Fire is so fatal when the following conditions occurred:

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1. Backdraft – it is the sudden and rapid (violent) burning of heated gases in a confined area that
occurs in the form of explosion. This may occur because of improper ventilation. If a room is not
properly ventilated, highly flammable vapors maybe accumulated such that when a door or window is
suddenly opened, the room violently sucks the oxygen from the outside and simultaneously, a sudden
combustion occur, which may happen as an explosion (combustion explosion).
2. Flashover – it is the sudden ignition of accumulated radical gases produced when there is
incomplete combustion of fuels. It is the sudden burning of free radicals, which is initiated by a spark or
flash produced when temperature rises until flash point is reached.
When accumulated volume of radical gases suddenly burns, there will be a very intense fire that
is capable of causing flames to jump at a certain distance in the form of fireball. Fireballs can travel to a
hundred yards with in a few seconds.
3. Biteback - a fatal condition that takes place when the fire resists extinguishment operations
and become stronger and bigger instead.
4. Flash Fire – better known as dust explosion. This may happen when the metal post that is
completely covered with dust is going to be hit by lightning. The dust particles covering the metal burn
simultaneously thus creating a violent chemical reaction that produces a very bright flash followed by an
explosion.

The Three Stages of Fire

1. Incipient Phase (Initial Stage) – under this stage, the following characteristics are observed:
normal room temperature, the temperature at the base of the fire is 400-800 F, ceiling temperature is
about 200 F, the pyrolysis products are mostly water vapor and carbon dioxide, small quantities of
carbon monoxide and sulfides maybe present.

2. Free Burning Phase – it has the following characteristics: accelerated pyrolysis process take
place, development of convection current: formation of thermal columns as heat rises, temperature is
800-1000 F at the base of fire, 1200-1600 F at ceiling, pyrolytic decomposition moves upward on the
walls(crawling of the flame) leaving burnt patterns (fire fingerprints), occurrence of flashover.

3. Smoldering Phase – this stage has the following characteristics: oxygen content drops to 13% or
below causing the flame to vanish and heat to develop in layers, products of incomplete combustion
increase in volume, particularly carbon monoxide with an ignition temperature of about 1125 F, ceiling
temperature is 1000-1300 F, heat and pressure in the room builds up, building/room contains large
quantities of superheated fuel under pressure but little oxygen, when sufficient supply of oxygen is
introduced, backdraft occurs.

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Classification of Fires

Based on Cause

1. Natural causes – such as

• Spontaneous heating – the automatic chemical reaction that results to spontaneous combustion
due to auto-ignition of organic materials, the gradual rising of heat in a confined space until ignition
temperature is reached.
• Lightning – a form of static electricity; a natural current with a great magnitude, producing
tremendous amperage and voltage. Lightning usually strikes objects that are better electrical conductors
than air. It can cause fire directly or indirectly. Indirectly when it strikes telephone and other
transmission lines, causing an induced line surge. It can also cause flash fire or dust explosion. When
lightning strikes steel or metal rod covered with dust, the dust will suddenly burn thus resulting to an
explosion.

A lightning may be in the form of:

Hot Bolt – longer in duration; capable only of igniting combustible materials

Cold Bolt – shorter in duration, capable of splintering a property or literally blowing apart an entire
structure, produces electrical current with tremendous amperage and very high temperature.

• Radiation of Sunlight – when sunlight hits a concave mirror, concentrating the light on a
combustible material thereby igniting it.

2. Accidental Causes – such as

• Electrical accidents in the form of:

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Short Circuit – unusual or accidental connections between two points at different potentials (charge) in
an electrical circuit of relatively low resistance.
Arcing – the production of sustained luminous electrical discharge between separated electrodes; an
electric hazard that results when electrical current crosses the gap between 2 electrical conductors.
Sparking – production of incandescent particles when two different potentials (charged conductors)
come in contact; occurs during short circuits or welding operations.
Induced Current – induced line surge – increased electrical energy flow or power voltage; induced
current; sudden increase of electrical current resulting to the burning of insulating materials, explosion
of the fuse box, or burning of electrical appliances.
Over heating of electrical appliances – the increase or rising of amperage while electric current is flowing
in a transmission line resulting to the damage or destruction of insulating materials, maybe gradual or
rapid, internal or external.

• Purely accidental causes
• Negligence and other forms of human error

3. Intentional causes (Incendiary)

If in the burned property, there are preparations or traces of accelerant, plants and trailers, then the
cause of fire is intentional.

Accelerant – highly flammable chemicals that are used to facilitate flame propagation.
Plant – the preparation and or gathering of combustible materials needed to start a fire.
Trailer – the preparation of flammable substances in order to spread the fire.

Based on Burning Fuel (the classes of fire)

1. Class A Fire – Ordinary fires; they are the types of fire resulting from the burning wood, paper,
textiles, rubber and other carbonaceous materials. In short, this is the type of fire caused by ordinary
combustible materials.
2. Class B Fire – Liquid fires; they are caused by flammable and or combustible liquids such as
kerosene, gasoline, benzene, oil products, alcohol and other hydrocarbon deviations.

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3. Class C Fire – Electrical fires; they are fires that starts in live electrical wires, equipment, motors,
electrical appliances and telephone switchboards.
4. Class D Fire – Metallic fires; fires that result from the combustion of certain metals in finely
divided forms. These combustible metals include magnesium, potassium, powdered calcium, zinc,
sodium, and titanium.

FIRE FIGTHING OPERATIONS AND EXTINGUISHMENT

Fire fighting is an activity intended to save lives and property. It is one of the most important
emergency services in a community. Fire fighters battle fires that break out in homes, factories, office
buildings, shops, and other places. Fire fighters risk their lives to save people and protect property from
fires.

The people who work as fire fighters also help others who are involved in many kinds of
emergencies besides fires. For example, fire fighters rescue people who may be trapped in cars or
vehicles after an accident. They aid victims of such disasters as typhoons, floods, landslides, and
earthquakes.

Before the advent of modern fire fighting techniques, fires often destroyed whole settlements. When a
fire broke out, all the people in the community rushed to the scene to help. Today, fire fighting
organizations in most industrialized nations have well-trained men and women and a variety of modern
fire fighting equipment.

History of Fire Fighting

Most fire services around the world were formed after a major fire made people realize that
lives and property would have been saved if they had had a proper body of people trained to fight fires.
One of the first organized fire fighting forces was established in Rome, about 500 B.C. The first fire
fighters were Roman slaves who, under the command of the city's magistrates, were stationed on the
walls and the gates of Rome. These units were called Familia Publica. However, this system was not
very effective, probably because the slaves had no choice in whether they fought fires or not. In A.D. 6,
after an enormous fire devastated Rome, the Emperor Augustus created the vigiles, a fire fighting force
of 7,000 men that was divided into seven regiments. Like many of today's fire services, the vigiles had
the power to inspect buildings to check for fire risks, and could punish property owners whose
negligence led to fires. The vigiles' fire fighting equipment included pumps, squirts, siphons, buckets,
and ladders. Wicker mats and wet blankets were used for rescue and salvage work. The Romans

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developed advanced fire fighting equipment. But when the empire fell, much of this technology was
lost for centuries.

After the collapse of the Roman Empire, European cities and towns became disorganized and
nobody coordinated fire fighting. Some people even thought that prayer was the best way to control
fires. Slowly, however, some fire laws evolved. In many cities people were required to put out their
cooking and home fires at night. In some towns, thatched roofs were forbidden and night watchmen
were employed to raise the alarm if they discovered a fire.

Organized fire services in Europe were usually only formed after hugely destructive fires. The
Great Fire of London in 1666 led to the development of fire insurance industries in England. These
companies marked their insured properties with metal badges called fire marks and formed private fire
brigades to protect those properties. Each company's brigade attended only those premises bearing the
company's own fire mark. There was much competition, and occasionally rival fire brigades even
obstructed each other in their fire fighting efforts. It was not until the 1800's that London insurance
companies began to cooperate and a single London Fire Engine Establishment was formed. The new
service fought fires in any premises within the London area.

Serious blazes also caused death and destruction elsewhere in Europe, and rulers began to
realize that it was necessary to have organized forces to deal with fires. In France, groups of citizens
kept watch for outbreaks of fire, and regulations controlled rescue operations. In the 1600's, a number
of serious fires spread terror throughout Paris. The king of France bought 12 pumps, and a private fire
service was established. In 1750, the company of firemen was mostly taken over by the army, but fires
continued to ravage the city and fire fighting efforts were not always effective. In 1810, the Emperor
Napoleon attended a ball at the Austrian Embassy. A candle set the curtains ablaze, and the fire spread
quickly, causing a dreadful panic. After this fire, Napoleon ordered the creation of the Battalion de
Sapeurs Pompiers and the French Fire Brigade was born.
Better equipment for getting water to fires and for fighting fires was developed in the 1500's.
Tools included syringes, which squirted water, but most people relied on bucket brigades, relays of men
passing buckets of water. The problems with bucket brigades were that many men were needed, it was
very tiring work, and it was not very efficient--buildings often burned to the ground. In 1672, an uncle
and nephew in Amsterdam, both called Jan van der Heide, invented a flexible hose, which could be
joined together to form a long pipe. Later, the same men invented a pump to deliver water through the
hose, and fire fighting became much more efficient. In many places around the world, fire pumps were
first drawn to fires by horses or even by people. Warning bells enabled people to get out of the way
when the pumps were rushing to a fire. The German company Daimler invented the first petrol-driven
pump in 1885, but the pump still had to be taken to fires by horses. Petrol-powered fire engines were
introduced in the early 1900's, but many countries were slow to change from horse-drawn pumps.
Although today's fire services have a range of modern equipment, fire can be just as dangerous now as it
was thousands of years ago.

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The Bureau of Fire Protection (BFP)

Republic Act # 6975, the DILG Act of 1990 (Chapter 4, Section 53-59) created the Bureau of Fire
Protection (BFP) to be responsible for the prevention and suppression of all destructive fires and to
enforce the laws on fire.
Fire Protection is the descriptive term referring to the various methods used by the bureau to stop,
extinguish and control destructive fire for eventual prevention of loss of life and property. It has the
following objectives: To prevent destructive fire from starting, To extinguish (stop or put out) on going
destructive fire, To confine a destructive fire at the place where it began, To prevent loss of life and
property when fire starts
Fire Prevention and Suppression refers to the various safety measures utilized to stop harmful
or destructive fires from starting.
The laws related with the fire prevention and fire protection in the Philippine setting includes PD # 1185,
Fire Code of the Philippine (26 August 1977), PD # 1096, Building Code of the Philippine (19 February
1977)
The Bureau of Fire Protection is composed of well-trained fire fighters. In fighting fires, they
bring with them ladders and pumps. Additional specialist vehicles can provide turntable ladders,
hydraulic platforms, extra water, foam, and specialist appliances for hazardous incidents.
In some countries, such as the United States, fire-fighting units are divided into engine companies and
ladder companies. Engine companies operate trucks called engines, which carry a pump and hoses for
spraying water on a fire. Ladder companies use ladder trucks, which carry ladders of various lengths.
Ladder trucks also have a hydraulically extended ladder or elevating platform to rescue people through
windows or to spray water from a raised position.
Fire fighters in the Philippines handle many types of fires. Each type requires a different plan of
action to put it out. For example, the methods used to fight a building fire differ greatly from those used
to fight a forest or grassland fire.

Factor Affecting Fire Protection and Control

Fire protection and control is affected by the accumulation of fire hazards in a building or area.
Fire Hazard is any condition or act that increases or may cause increase in the probability that
fire will occur or which may obstruct, delay, hinder or interfere with fire fighting operations and the
safeguarding of life and property

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Conditions of Fire Hazards

1. Existence of dangerous or unlawful amount of combustible or explosives in the building not
designed to store such materials.
2. Defective or improperly installed facilities/ equipment.
3. Lack of adequate exit facilities.
4. Obstruction at fire escapes or other designated opening for fire fighters.
5. Dangerous occumulation of rubbish waste and other highly combustible materials.
6. Accumulation of dust in ventilation system or of grease in the kitchen.
7. Building under repair
8. Very old building or building is primarily made of combustible materials

Fire Fighting Operations

Fire fighting operations refers to fire suppression activities. In general the following procedures
should be observed:

1. PRE-FIRE PLANNING - this activity involves developing and defining systematic course of actions
that maybe performed in order to realize the objectives of fire protection: involves the process of
establishing the SOP in case fire breaks out.
2. EVALUATION – SIZE – UP (on-the-spot planning or sizing-up the situation) - this is the process
knowing the emergency situation. It involves mental evaluation by the operation officer-in-charge to
determine the appropriate course of action that provides the highest probability of success.
3. EVACUATION – This the activity of transferring people, livestock, and property away from the
burning area to minimize damage or destruction that the fire might incur in case it propagates to other
adjacent buildings.
4. ENTRY – This is the process of accessing the burning structure. Entry maybe done in a forcible
manner.
5. RESCUE – This is the operation of removing (extricating), thus saving, people and other livestock
from the burning building and other involved properties, conveying them to a secure place

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6. EXPOSURE – also called cover exposure, this is the activity of securing other buildings near the
burning structure in order to prevent the fire from the extending to another building.
7. CONFINEMENT – This is the activity of restricting the fire at the place (room) where it started :
the process of preventing fire from extending from another section or form one section to another
section of the involved building.
8. VENTILATION – This the operation purposely conducted to displace toxic gases. It includes the
process of displacing the heated atmosphere within the involved building with normal air from outside
atmosphere.
9. SALVAGE – The activity of protecting the properties from preventable damage other than the
fire. The steps are a) remove the material outside the burning area, and b) protecting or cover the
materials by using tarpaulins (cotton canvass treated with water proofing).
10. EXTINGUISHMENT – This is the process of putting out the main body of fire by using the 4
general methods of fire extinguishments.
11. OVERHAUL – This is the complete and detailed check of the structure and all materials therein to
eliminate conditions that may cause re-flash; involves complete extinguishments of sparks or
smouldering (glowing) substances (embers) to prevent possibilities of re-ignition or rekindling.
12. FIRE SCENE INVESTIGATION - This is the final stage of fire suppression activities. It is an inquiry
conducted to know or determine the origin and cause of fire.

What is a Sprinkle System?

A sprinkler system consists of a network of pipes installed throughout a building. The pipes carry water
to nozzles in the ceiling. The heat from a fire causes the nozzles directly above the fire to open and
spray water.
The Fire Bureau personnel inspect public buildings to enforce the local code. The officials check
the operating condition of the fire protection systems. They note the number and location of exits and
fire extinguishers. The inspection also covers housekeeping practices and many other matters that
affect fire safety. Fire inspectors may also review plans for a new building to make sure it meets the
safety code.

What is a Smoke Detector?

Smoke detector is a device that sounds an alarm if a small amount of smoke enters their sensors.
Smoke detectors are attached to the ceiling or wall in several areas of the home. Fire protection experts
recommend at least one detector for each floor of a residence.

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Fire fighters also recommend that people have portable fire extinguishers in their homes. A
person must be sure, however, to call the fire fighting service before trying to extinguish a fire. It is also
important to use the right kind of extinguisher for the type of fire involved.

The Fire Extinguishment Theory

The Fire Extinguishments Theory maintains that “to extinguish a fire, interrupt or eliminate the
supply of any or all of the elements of fire.” Fire can be extinguished by reducing/ lowering the
temperature, eliminating the fuel supply, or by stopping the chemical chain reaction.

4 General Methods of Fire Extinguishment

1. Extinguishment by Temperature Reduction
- Cooling the temperature of the fire environment: usually done by using water.
- Lower down the temperature to cool the fuel to a point where it does not produce sufficient
vapors that burn.

2. Extinguishment by Fuel Removal
- Elimination of the fuel supply/ source which maybe done by stopping the flow of liquid fuel,
preventing the production of flammable gas, removing the solid fuel at the fire path, allowing the fire to
burn until the fuel is consumed

3. Extinguishment by Oxygen Dilution - reduction of oxygen concentration at the burning area, by
introducing inert gases, by separating oxygen from the fuel

4. Extinguishment by Chemical Inhibition
- Some extinguishments agents, like dry chemical and halon, interrupt the production of flame
resulting to rapid extinguishment of the fire. This method is effective only on burning gas and liquid fuels
as they cannot burn in smoldering mode of combustion.

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What are the methods of extinguishing the 4 Classes of Fire?

1. CLASS A FIRES – by quenching and cooling: water is the best agent in cooling the burning solid
materials; water has a quenching effect that can reduce the temperature of a burning material below its
ignition temperature; (Fire extinguishers which have water, sand, acid, foam and special solution
containing alkali methyl dust, as found in the loaded stream extinguisher, should be used for this type of
fire.)
2. CLASS B FIRES – by smothering or blanketing (oxygen exclusion). This type of fire is put or
controlled by foam, loaded stream, carbon dioxide, dry chemical and vaporizing liquid.
3. CLASS C FIRES – controlled by a non-conducting extinguishing agent: the safest procedure is to
always de-energize the electrical circuit. Extinguishers that should be used to put out these type of fires
are Carbon Dioxide Extinguishers, Dry Chemical, Vaporizing liquids.
4. CLASS D FIRES – by using special extinguishing agents marked specifically for metals. GE type,
meth LX, Lith X, Meth L, Kyl, dry sand and dry talc can put out class D fires
5. CLASS E FIRES – only combination of the above methods.

Fire Extinguishers

A Fire Extinguisher is a mechanical device, usually made of metal, containing chemicals, fluids, or
gasses for stopping fires, the means for application of its contents for the purpose of putting out fire
(particularly small fire ) before it propagates, and is capable of being readily moved from place to place.

It is also a portable device used to put out fires of limited size.

What are the types of Fire Extinguishers?

1. Water Fire Extinguisher – extinguisher filled with water use of fight Class A and Class B fires
except class C fires.
2. Liquefied Fire Extinguisher – those extinguishers that contain Carbon Monoxide Gas use to fight
class A, B, and C fires
3. Dry Chemical Extinguisher – those that contain chemical powder intended to fight all classes of
fires.

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4. Foam Extinguisher– contains sodium bicarbonate and a foam-stabilizing agent in a larger
compartment and a solution of aluminum sulfate in an inner cylinder; reaction between the two
solutions forms a stabilized foam of carbon dioxide bubbles.
5. Soda-acid Fire Extinguisher – filled with sodium bicarbonate mixed with water; a small bottle of
sulfuric acid is suspended inside (near the top) in such a way that when the extinguisher is turned up-
side-down, the acid mixes with sodium bicarbonate; carbon dioxide is formed by the reaction which
results to the building of pressure inside the extinguisher; this pressure forces the water solution out
from the container through a hose.
6. Vaporizing Liquid Fire Extinguisher – contains non-conducting liquid, generalization carbon
tetrachloride or chlorobromethane; operation is by manual pumping or using a stored pressure; the
stream of liquid that is expelled is vaporized by the heat of the fire and forms a smothering blanket. This
type is usually used in fires involving flammable liquids or electrical equipment.
7. Carbon Dioxide Fire Extinguisher – effective against burning liquids and fires in live electrical
equipment; used mainly to put out Class C fires.

What are examples of extinguishing agents?

1. MULTI-PURPOSE DRY CHEMICALS like the Mono-Ammonium Phosphate ( NH H PO )
2. BCF-HALON 1211 or Bromochlorodifluoromethane
3. AFFF – (Aqueous Film Forming Foam), is a synthetic foam-forming liquid designed for use with
fresh water.
4. CARBON DIOXIDE – a chemical that can deliver a quick smothering action to the flames,
reducing the oxygen and suffocating the fire. Carbon dioxide dissipates without leaving any
contamination or corrosive residue.

What are the markings required on Fire Extinguishers?

Under (Rule 37, Sec. 106 of PD 1185), all fire extinguishers manufactured or sold in the
Philippines must be labelled or marked to show at least the following:

1. Date of original filling
2. Chemical Contents
3. Type of extinguisher
4. Operating Instruction and Safe Procedure in usage

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5. Name and address of the manufacturer
6. Name and address of the dealer.

What are the prohibited types of fire extinguishers?

Rule 37, Sec. 104 of IRR of PD 1185 provides that the following types of fires extinguishers are
prohibited for manufacture or sale:

1. All inverting types which make it necessary to invert the container before the extinguisher’s
operation
2. Soda-acid extinguishers
3. Stored pressure or cartridge operated foam solution, unless and air-aspiring nozzle is provided
4. Vaporizing liquid extinguishers using carbon tetrachloride or chlorobromomethane in any
concentration of formulation
5. Vaporizing liquid extinguishers of less than one kilogram extinguishing agent
6. Glass bulb, “ grenade” type, or “bomb” type of vaporizing liquid extinguishers which have to be
thrown to the fire or are mounted on specific location and which operate upon the melting of a fusible
link.
7. Thermatic special hazards single station extinguishers with extinguishing capability of less than
four and a half (4.5) cubic meters
8. Other types which maybe hereinafter prohibited.

What are the prohibited acts involving the operation of fire extinguishers?

From the same legal basis above, the following are declared prohibited acts concerning the use
of fire extinguishers:

1. Removal of inspection tags attached to fire extinguishers
2. Refilling a discharge extinguisher with a extinguishing agent other than what the unit was
designed to contain
3. Selling fire extinguishers not appropriate to the hazard
4. Selling fire extinguishers prohibited by Rule 37, Section 104

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5. Selling defective or substandard extinguishers
6. Using/installing two or more thermatic special hazard vaporizing liquid units in rooms with
volume greater than the nominal capability of one unit.
7. Installing pressure gauges in fire extinguishers which do not indicate the actual pressure of the
interior of vessel such as, but not limited to use of uncalibrated gauges, not providing or blocking the
connection between the gauge and the interior, or fixing the indicator/needle to indicate a certain
pressure.

What are the General Operating Procedures in Fire Extinguishment?

The general operating procedures in using a fire extinguisher may be modified by the acronym
PASS.

P - Pull the pin at the top of the extinguisher that keeps the handle from being pressed. Press
the plastic or thin wire inspection band.
A– Aim the nozzle or outlet towards the fire. Some hose assemblies are dipped to the
extinguisher body. Released it and then point at the base of the fire.
S – Squeeze the handle above carrying handle to discharge the extinguishing agent inside. The
handle can be released to stop the discharge at any time.
S – Sweep the nozzle sideways at the base of the flame to disperse the extinguishing agent.

After the fire is out, probe for remaining smouldering hot spots or possible re-flash of flammable liquids.
Make sure the fire is out before leaving the burned area.

Fire Fighting Equipment

The most important equipment for fire fighters includes:

1. Communication Systems

They are necessary to alert fire fighters to the outbreak of a fire. Most fire alarms are
telephoned to the fire department. Many countries have introduced a simple, 3-digit number as the
telephone number to call in emergencies. This number can be dialed from almost any telephone and

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from most pay phones without a coin. Dialing this number is free. In the Philippines, the emergency line
is 166.

2. Fire Vehicles

Fire fighters have several types of fire vehicles. The main types are (1) engines, (2) ladder
appliances, and (3) rescue vehicles.
Engines, also called water tenders, have a large pump that takes water from a fire hydrant or
other source. The pump boosts the pressure of the water and forces it through hoses. Engines carry
several sizes of hoses and nozzles. Many also have a small-diameter hose called a booster line, which is
wound on a reel. The booster line is used chiefly to put out small outdoor fires.
Ladder appliances - There are two kinds of ladder appliances--turntable ladders and hydraulic
platforms.
A turntable ladder appliance has a metal extension ladder mounted on a turntable. The ladder can be
raised as high as 30 meters, or about eight storeys.
A hydraulic platform truck has a cage-like platform that can hold several people. The platform is
attached to a lifting device that is mounted on a turntable. The lifting device consists of either a hinged
boom (long metal arm) or an extendable boom made of several sections that fit inside each other. The
boom on the largest vehicles can extend 46 meters. A built-in hose runs the length of the boom and is
used to direct water on a fire. In most cases, a pump in a nearby engine generates the pressure needed
to spray the water.
Fire Fighting Vehicles - are equipped with portable ladders of various types and sizes. They also
carry forcible entry tools, which fire fighters use to gain entry into a building and to ventilate it to let out
smoke. Common forcible entry tools include axes, power saws, and sledge hammers.
Rescue Vehicles are enclosed vehicles equipped with many of the same kinds of forcible entry
tools that ladder appliances carry. But rescue vehicles also carry additional equipment for unusual
rescues. They have such tools as oxyacetylene torches, for cutting through metal, and hydraulic jacks,
for lifting heavy objects. They may also carry other hydraulic tools. With a hydraulic rescue tool, fire
fighters can apply a large amount of pressure to two objects to squeeze them together or prise them
apart. The tool is often used to free people trapped in cars and other vehicles after an accident. Many
rescue vehicles also carry small hand tools, such as crowbars and saws, and ropes and harnesses for
rescuing people from water or high places. In addition, they carry medical supplies and equipment.
Special Fire Vehicles include airport crash tenders and hazardous materials units. Airport crash
tenders are engines that spray foam or dry chemicals on burning aircraft. Water is ineffective against
many aircraft fires, such as those that involve jet fuel or certain metals.
In addition to the above fire fighting equipment, fire fighters are also required to use protective
clothing.

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Protective Clothing - clothing for protection against flames, falling objects, and other hazards.
They wear coats and trousers made of fire-resistant material. Other clothing includes special boots,
gloves, and helmets. Fire fighters also use a breathing apparatus to avoid inhaling smoke and toxic
gases.

Fire Prevention and Public Safety

As mentioned earlier, Fire Prevention is a term for the many safety measures used to keep harmful fires
from starting. Fires not only cause extensive damage to valuable property, but also responsible for large
numbers of deaths.

BASIC FIRE INVESTIGATION

In the Philippines, the Bureau of fire Protection is the main government agency responsible for
the prevention and suppression of all destructive fires on buildings, houses and other structures, forest,
land transportation vehicles and equipments, ships or vessels docked at piers or major seaports,
petroleum industry installation, plane crashes and other similar incidents, as well as the enforcement of
the Fire Code and other related laws. It has the major power to investigate all causes of fires and
necessary, file the proper complaints with the proper authority that has jurisdiction over the case (R.A.
no. 6975, sec. 54).

Why Fires should be investigated?

The very reason why fires should be investigated is to determine the cause of the fire in order to
prevent similar occurrences. The determination of the origin and cause of fire is arrived at only after a
thorough investigation. Since basic investigation is prelude to the discovery of the true cause of the fire,
an understanding of the chemistry of fire and its attendant behavior should be a concern for successful
investigation.

Who are qualified to investigate fires?

A fire investigator should have the following traits:

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1. Possession of knowledge of investigational techniques.
2. He should have an insight of human behavior.
3. He should have a first hand knowledge of the chemistry of fire and its behavior
4. He should be resourceful.

Is Fire Investigation Complex and Unique?

Fire investigation is complex and unique because of the following reasons:

1. Fire destroys evidence
2. If it is Arson, it is planned, motivated and committed is discreet.
3. Rarely can there be an eyewitness in Arson.

What are the roles of the Firemen in Fire Investigation?

Firemen are usually at the crime scene ahead of the fire investigators. Hence, they are valuable
sources of information. They are the so-called “Eyes and Ears” of the police before, during and after the
fire has been placed under control. The information taken from them may be categorize as:

1. Information attainable or developed prior to the arrival at the scene
2. Information available to the firemen at the scene
3. Information available during overhaul and thereafter.

Legal Aspect of Fire Investigation

ARSON defined

Arson is the intentional or malicious destruction of property by fire.
It is the concern of fire investigation to prove malicious intent of the offender. Intent must be proved,
otherwise, no crime exist. The law presumes that a fire is accidental, hence criminal designs must be

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shown. Fire cause by accident or criminal design must be shown. Fire cause by accident or negligence
does not constitute arson.

What is Destructive Arson?

Under Article 320 of the Revised Penal Code, as amended, the penalty of Reclusion Perpetua to
Death shall be imposed upon any person who shall burn:

1. One (1) or more buildings or edifices, consequent to one single act of burning, or as a result of
simultaneous burnings, or committed on several or different occasions.
2. Any building of public or private ownership, devoted to the public in general or where people
usually gather or congregate for a definite purpose such as, but not limited to official governmental
function or business, private transaction, commerce, trade workshop, meetings and conferences, or
merely incidental to a definite purpose such as but not limited to hotels, motels, transient dwellings,
public conveyance or stops or terminals, regardless of whether the offender had knowledge that there
are persons in said building or edifice at the time it is set on fire and regardless also of whether the
building is actually inhabited or not.

3. Any train or locomotive, ship or vessel, airship or airplane devoted to transportation or
conveyance, or for public use, entertainment or leisure.
4. Any building, factory, warehouse installation and any appurtenances thereto, which are devoted
to the service to public utilities.
5. Any building the burning of which is for the purpose of concealing or destroying evidence of
another violation of law, or for the purpose of concealing bankruptcy or defrauding creditors or to
collect from insurance.

Irrespective of the application of the above enumerated qualifying circumstances, the penalty of
reclusion to death shall likewise be imposed when the arson is perpetrated or committed by two or
more persons or by group of persons, regardless of whether their purpose is merely to burn or destroy
the building or the building merely constitutes an overt act in the commission or another violation of
law.

The penalty of Reclusion Perpetua to Death shall also be imposed upon any person who shall
burn:

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1. any arsenal, shipyard, storehouse or military power or firework factory, ordinance, storehouse,
archives or general museum of the government.
2. in an inhabited place, any storehouse or factory of inflammable or explosives materials.

If the consequence of the commission of any of the acts penalized under this Article, death results, the
mandatory penalty of death shall be imposed (sec. 10, RA 7659).

What is the basis of criminal liability in arson?

1. Kind and character of the building burned
2. Location of the building
3. Extent or value of the damage
4. Whether inhabited or not.

What are other forms of arson?

Other forms of arson refers to those enumerated under Article 321 of the Revised Penal Code,
as amended like the following:

1. Setting fires to any building, farmhouse, warehouse, hut, shelter, or vessel in port, knowing it to
be occupied at the time by one or more person.
2. Building burned is a public building and value of damage exceeds six thousands pesos
(P6000.00).
3. Building burned is a public building and purpose is to destroy evidence kept therein to be used
in instituting prosecution for punishment of violators of law, irrespective of the amount of damage.
4. Building burned is a public building and purpose is to destroy evidence kept therein to be used
in legislative, judicial or administrative proceeding, irrespective of the damage, if the evidence is to be
used against defendant of any crime punishable under existing law.

Arson of Property of Small Value (Art. 323, RPC)

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Burning of any uninhabited hut, storehouse, barn, shed, or any other property, under
circumstances clearly excluding all danger of the fire spreading, value of the property not exceed 25.00
pesos.

Crimes Involving Destruction (Art 324, RPC)

The offender causes destruction by any of the following means:

1. explosion
2. discharge of electric current
3. inundation, sinking or stranding of a vessel
4. taking up the rails from a railway track
5. malicious changing of railway signals for the safety of moving trains
6. destroying telegraph wires and telegraph post or those any other communication system
7. by using any other agency or means of destruction as effective as the above

Burning one’s own property as a means to commit arson (Read Case of U.S vs. Budiao, 4 Phil.
502) (Article 325, RPC)

Article 326, RPC – Setting Fire to Property Exclusively Owned By the Offender

This act is punished if the purpose of the offender is to:

1. Defraud or cause damage to another or
2. damaged is actually caused upon another’s property even if such purpose is absent
3. thing burned is a building in an inhabited place.

Presidential Decree No. 1613 – Amending the Law on Arson

Special Aggravating Circumstance in Arson

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1. If committed with intent to gain:
2. If committed with the benefit of another:
3. If the offender is motivated by spite or hatred towards the owner or occupant of the property
burned:
4. If committed by a syndicate (3 or more persons).

Prima Facie Evidence of Arson

1. If the fire started simultaneously in more than one part of the building or establishment
2. If substantial amounts of flammable substance or materials are stored within the building not
necessary in the business of the offender nor for house hold use.
3. If gasoline, kerosene, petroleum, or other flammable or combustible substances or materials
soaked therewith or containers thereof, or any mechanical, electrical, chemical, or electronic
contrivance designed to start a fire, a fire, or ashes or traces of any of the foregoing are found in the
ruins or premises of the burned building or property.
4. If the building or property is insured for substantially more than its actual value at the time of
the issuance of the policy.
5. If during the lifetime of the corresponding fire insurance policy more than two fires have
occurred in the same or other premises owned or under the control of the offender and / or insured.
6. If shortly before the fire, a substantial portion of the effects insured and stored in a building or
property had been withdrawn from the premises except in the ordinary course of business.
7. If a demand for money or other valuable consideration was made before the fire in exchange for
the desistance of the offender or the safety of the person or property of the victim.

Arson Investigation

What Constitutes Arson?

1. Burning – to constitute burning, pyrolysis must takes place. In other words, there must be
burning or changing, i.e. the fibber of the wood must be destroyed, its identity changed.
2. Wilfulness – means intentional, and implies that the act was done purposely and intentionally.

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3. Malice – it denotes hatred or a desire for revenge.
4. Motive – is the moving cause that induces the commission of the crime.
5. Intent – is the purpose or design with which the act is done and involves the will.

Methods of Proof in Arson

Physical evidences in arson are often destroyed. To prove arson was committed, Corpus Delicti must be
shown and identify of the arsonist must be established. Corpus Delicti (body of the crime) is the fact of
that crime was committed. The following must show it:

1. Burning – that there was fire that may be shown by direct testimony of complaint, firemen
responding to the crime, other eyewitnesses. Burned parts of the building may also indicate location.
2. Criminal Design – must show that it was wilfully and intentionally done. The presence of
incendiary devices, flammables such as gasoline and kerosene may indicate that the fire is not
accidental.
3. Evidence of Intent – When valuables were removed from the building before the fire, ill-feeling
between the accused and the occupants of the building burned, absence of effort to put off fire and
such other indications.

What are basic lines of inquiry in Arson Investigation?

The arson investigator must have to inquire on the following a) point of origin of fire b) motives
of arsonist c) prime suspects d) the telltale signs of arson.

1. Point of origin of fire

Initially, the important point to be established is the point of origin of fire. In other words, at what
particular place in the building the fire started? This may be established by an examination of the
witness, by an inspection of the debris at the fire scene and by studying the fingerprint of fire. The
fingerprint of fire occurs during the free burning stage of the fire when pyrolytic decomposition moves
upward on the walls leaving a bunt pattern.

Witnesses must be questioned as to:

86

1. His identity
2. What attracted his attention
3. Time of observation
4. His position in relation to the fire at the time of observation
5. Exact location of the blaze
6. Size and intensity
7. Rapidity of spread
8. Color of flame and odor if he is in a position this
9. Any other person in the vicinity beside the witness

Note fire setting mechanism
1. matches
2. candles
3. electrical system
4. mechanical means
5. chemical methods

2. Motive of Arsonist

To understand the motives of arsonist, the arson investigator have to note the following that
fires are set by:

Persons with Motives

a. Those with desire to defraud the Insurer
b. Employees or such other person who have a grievance (Fire revenge)
c. Those with desire to conceal evidence of a crime
d. Those who set fire for purposes of intimidation

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People without motives

a. Those who are mentally ill
b. Pathological fire-setters
c. Pyros and the Psychos

Motives of Arsonist

1. Economic Gain
a. Insurance fraud – benefiting
b. Desire to dispose merchandise – lost of market value being out of season, lack of raw materials,
over supply of merchandise can be a big reason for arson.
c. Existing business transaction that the arsonist would like to avoid such as impending liquidation,
settlement of estate, need for cash, prospective business failure, and increase rentals
d. Profit by the Perpetrator other than the Assured like insurance agents wishing business with the
assured, business competitors planning to drive others, person seeking job as personnel protection,
salvagers and contractors wishing to contact another building
2. Concealment of Crime - When the purpose of hiding a crime or committing a crime, arson was
used as means.
3. Punitive Measure - Committing arson to inflict injury to another due to hatred, jealousy and
revenge.
4. Intimidation or Economic Disabling - Arsonist as saboteurs, strikers and racketeers to intimidate
management or employer.
5. Pyromania
A pyromaniac having the uncontrollable impulse to burn anything without any motivation. They do not
run away from the fire scene since they love watching fire burning.

Types of Pyromania

a. Abnormal Youth – epileptics, imbeciles and morons
b. Hero Type – a person set a building on fire and pretends to discover it, turn on the alarm or
make some rescue works to appear as “hero”

88

c. Drug addicts and alcoholics
d. Sexual deviates and perverts.

3. Prime Suspects (and the Prima Facie Evidences)

The development of prime suspects - this involves identification results from the full development of
leads, clues and traces, the testimony particularly eyewitnesses and the development of expert
testimony, The following technique may serve the investigation:

1. Search of the fire scene for physical evidence:
a. Protection of the scene
b. Mechanics of search
c. Collection and preservation of evidences
d. Laboratory aids

2. Background study of policyholders, occupants of premises, owner of building or other person
having major interest in the fire.
3. Interviews and interrogations of persons who discovered the fire, and the one who turned the
first alarm, firemen, and eyewitnesses.
4. Surveillance

4. The Tell Tale Signs of Arson

These signs maybe obvious that the first fireman at the scene will suspects arson or they maybe
so well concealed that moths of patient investigation to show that it is set off will be required.

1. Burned Building – the type of the building may indicate a set fire under certain circumstance. A
fire of considerable size at the time the first apparatus arrive at the scene is suspicious if it is a modern
concrete or semi-concrete building.
2. Separate fires – when two or more separate fire breaks out within a building. The fire is certainly
suspicious.

89

3. Color of Smoke – some fire burn with little or no smoke but they are exception. The observation
of the smoke must be made at the start of the fire since once the fire has assumed a major proportion,
the value of the smoke is lost, because the smoke will not indicate the material used by the arsonist

a.) When white smoke appears before the water from the fire hose comes in contact with the fire,
it indicates humid material burning. Example – burning hay, vegetable materials, phosphorus (with garlic
odor).
b.) Biting smoke, irritating the nose and throat and causing lacrymation and coughing indicates
presence of chlorine.
c.) Black smoke indicates lack of air if accompanied by large flames it indicates petroleum products
and rubber.
d.) Reddish-brown smoke indicates nitrocellulose, S1, H2, S04, HN03, or HCI.
e.) Meaning of color of Smoke and Fire:

• Black smoke with deep red flame – petroleum products, tar, rubber, plastics, etc.
• Heavy brown with bright red flame – nitrogen products
• White smoke with bright flame – magnesium products
• Black smoke with red and blue green flame – asphalt
• Purple-violet flame – potassium products
• Greenish-yellow flame – Chloride or Manganese products
• Bright reddish yellow flame – Calcium products

8. Color of flame – The color of the flame is a good indication of the intensity of the fire, an
important factor in determining incendiarism.
9. Amount of Heat – A reddish glow indicates heat of 5000 degrees centigrade, a real bright read
about 100 degrees centigrade. Red flames indicate of petroleum. Blue flame indicates use of alcohol as
accelerant.
10. Smoke Marks – An experience investigation will determine the volume of smoke involved at a
fire and the character as residue deposited on walls or elsewhere. Smoke in marks have often been of
assistance in determining the possibility of a fire having more than one place of origin.
11. Size of Fire – This is important when correlated with the type of alarm, the time received and
the time of arrival of the first fire apparatus. Fires make what might be termed a normal progress. Such
progress can be estimated after an examination of the material burned the building and the normal

90

ventilation offered of the fire. The time element and the degree of headway by the flames become
important factors to determine factors to determine possible incendiarism.
12. Direction of Travel – While it is admitted that no two fires burn in identical fashion, yet it can be
shown that fire makes normal progress through various types of building materials, combustibility of
contents, channel of ventilation and circumstances surrounding the sending of alarm, an experienced
investigator can determine whether a fire spread abnormally fast.
13. Intensity – The degree of heat given off by a fire and the color of its flame oftentimes indicate
that some accelerant has been added to the material normally present in a building and the investigator
must look for further evidence pointing to use of such accelerant. Difficulty in extinguishing the fire is
often a lead to suspect presence of such fluid as gasoline and kerosene.
14. Odor – The odor of gasoline, alcohol, kerosene and other inflammable liquids which are often
used as accelerant is characteristics and oftentimes arsonist are trapped because of this telltale sign.
Most of fire – setters are inclined to use substance which will make the blaze certain and at the same
time burn up any evidence of their crime.
15. Condition of Content – Persons tending to set their house on fire frequently remove objects of
value either materially or sentimentally. Store and other business establishments oftentimes remove a
major portion of their content or replace valuable merchandise without of style articles.

Fire Technology and Investigation Reviewer 1

1. The use of one or more electrical appliances or devices which draw
or consume electrical current beyond the designed capacity of the
existing electrical system
A. self-closing door
B. jumper
C. overloading
D. oxidizing material

2. An enclosed vertical space of passage that extends from the floor
to floor, as well as for the base to the top of the building is called
A. sprinkle evidence
B. vertical shaft
C. flash point
D. standpipe system

3. A wall designated to prevent the spread of fire having a fire
resistance rating of not less than four hours with sufficient
structural stability to remain standing even if construction on either
side collapses under the fire conditions.
A. Wood rack
B. Fire wall
C. Post wall

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D. Fire trap

4. Any act that would remove or naturalized a fire hazard
A. Allotment
B. Combustion
C. Distillation
D. Abatement

5. The ____ shall be conducted as a pre-requisite to grant permits
and/or license by local governments or other government agencies.
A. Fire safety inspection
B. Fire protection assembly
C. Fire alerting system
D. Fire service

6. An instance that may cause fires from the heat accumulated from
the rolling, sliding or friction in machinery or between two hard
surfaces, at least one of which is usually a metal is called.
A. static electricity
B. overheating of machine
C. friction heat
D. heat from arching

7. Method of heat transfer by direct contact
A. nuclear fission
B. conduction
C. convection
D. Radiation

8. Instrument used to open and close a fire hydrant
A. hydrant key
B. kilowatts
C. key board
D. bunch of key

9. Energy is transferred from one body to another by thermal
interactions.
A. Fire
B. Smoke
C. Heat
D. Ember

10.The transfer of heat from one place to another by the movement
of fluids.
A. Convection
B. Radiation

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C. Conduction
D. None of the above

1. Combustion or burning in which substances combine chemically with
oxygen from the air and typically give out bright light,heat and
smoke.
A. Flame
B. Heat
C. Fire
D. Smoke
Ans. C
2. A hot glowing body of ignited gas that is generated by something
on fire.
A. Flame
B. Heat
C. Fire
D. Smoke
Ans. A
3. An extensive fire that destroys a great deal of land or property.
A. Conflagration
B. Burning
C. Fire
D. Combustion
Ans. A
4. Means on fire or very hot or bright.
A. Flame
B. Burning
C. Fire
D. Combustion
Ans. B
5. The rapid chemical combination of a substance with oxygen
involving the production of heat and light.
A. Flame
B. Burning
C. Fire
D. Combustion
Ans.D
6. The quality of being hot or high temperature at which fuel will
continue to burn for atleast 5 seconds after ignition by an open
flame.
A. Flame
B. Heat
C. Fire
D. Smoke
Ans. B

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7. The natural agent that stimulates sight and makes things visible.
A. Flame
B. Heat
C. Light
D. Smoke
Ans. C
8. Is one of the 4 fundamental states of matter, the other being
solid,liquid and gas.
A. Flame
B. Plasma
C. Light
D. Smoke
Ans. B
9. The lowest temperature a which the vapor of a combustible liquid
can be ignited in air.
A. Flash point
B. Ignition temperature
C. Fire point
D. Boiling point
Ans. A
10. Is the temperature at which fuel will continue to burn for at least
five seconds after ignition by an open flame.
A. Flash point
B. Ignition temperature
C. Fire point
D. Boiling point
Ans. C

Remember the following:

1. Fire - Combustion or burning in which substances combine
chemically with oxygen from the air and typically give out bright
light,heat and smoke.

2. Flame - A hot glowing body of ignited gas that is generated by
something on fire.

3. Conflagration - An extensive fire that destroys a great deal of
land or property.

4. Burning - Means on fire or very hot or bright.

5. Combustion - The rapid chemical combination of a substance with
oxygen involving the production of heat and light.

6. Heat - The quality of being hot or high temperature at which fuel

94

will continue to burn for at least 5 seconds after ignition by an
open flame.

7. Light - The natural agent that stimulates sight and makes things
visible.

8. Plasma - Is one of the 4 fundamental states of matter, the other
being solid,liquid and gas.

9. Flash point - The lowest temperature a which the vapor of a
combustible liquid can be ignited in air.

10.Fire point - Is the temperature at which fuel will continue to burn
for at least five seconds after ignition by an open flame.

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