Conditional statement and control statement 1

Thank you

1. AGRICULTURAL POWER, AGRICULTURAL POWER,
MACHINERY, AND MACHINERY, AND
ALLIED SUBJECTS ALLIED SUBJECTS
Prepared by:Prepared by:
Engr. Alexis T. BelonioEngr. Alexis T. Belonio
Professional Agricultural EngineerProfessional Agricultural Engineer
Department of Agricultural Engineering and Environmental Department of Agricultural Engineering and Environmental
Management Management
Central Philippine UniversityCentral Philippine University
Iloilo CityIloilo City
[email protected]@yahoo.com

2. An engine that burns fuel inside the An engine that burns fuel inside the
cylinder.cylinder.
a.a.External combustion External combustion
engineengine
b.b.Internal combustion Internal combustion
engineengine
c.c.Sterling engineSterling engine
d.d.None of the aboveNone of the above
Answer – internal Answer – internal
combustion enginecombustion engine

3. Part of engine that which slides up and Part of engine that which slides up and
down the cylinder and transmits power to down the cylinder and transmits power to
the crankshaft.the crankshaft.
a.a.Connecting rodConnecting rod
b.b.Cylinder blockCylinder block
c.c.PistonPiston
d.d.Spark plugSpark plug
Answer - PistonAnswer - Piston

4. Amount of power that the Amount of power that the
manufacturer specified for an engine.manufacturer specified for an engine.
a.a.Indicated horsepowerIndicated horsepower
b.b.Brake horsepowerBrake horsepower
c.c.Rated horsepowerRated horsepower
d.d.Belt horsepowerBelt horsepower
Answer – Rated Horsepower Answer – Rated Horsepower

5. Distance of movement piston from Distance of movement piston from
the top dead to the bottom dead the top dead to the bottom dead
center.center.
a.a.StrokeStroke
b.b.BoreBore
c.c.Valve clearanceValve clearance
d.d.None of the AboveNone of the Above
Answer - StrokeAnswer - Stroke

6. Reduction of engine speed or flow of Reduction of engine speed or flow of
fuel.fuel.
a.a.ThrottlingThrottling
b.b.ClutchingClutching
c.c.AtomizationAtomization
d.d.None of the aboveNone of the above
Answer - ThrottlingAnswer - Throttling

7. A device which uses fluid power to A device which uses fluid power to
produce mechanical force and produce mechanical force and
motion. motion.
a.a.Governor Governor
b.b.AccumulatorAccumulator
c.c.ActuatorActuator
d.d.None of the aboveNone of the above
Answer - ActuatorAnswer - Actuator

8. A mechanical breaking up of fuel A mechanical breaking up of fuel
into spray droplets by high velocity of into spray droplets by high velocity of
air passing through a jet.air passing through a jet.
a.a.AtomizationAtomization
b.b.CarburetionCarburetion
c.c.Turbo chargingTurbo charging
d.d.None of the aboveNone of the above
Answer - AtomizationAnswer - Atomization

9. A device that is used to actuate the A device that is used to actuate the
throttle of an engine to increase its throttle of an engine to increase its
speed. speed.
a.a.GovernorGovernor
b.b.AcceleratorAccelerator
c.c.ActuatorActuator
d.d.None of the aboveNone of the above
Answer - AcceleratorAnswer - Accelerator

10. Usable power delivered by the engineUsable power delivered by the engine
a.a.Indicated horsepowerIndicated horsepower
b.b.Brake horsepowerBrake horsepower
c.c.Rated horsepowerRated horsepower
d.d.None of the aboveNone of the above
Answer – Brake Answer – Brake
horsepowerhorsepower

11. A device that meter the fuel air and A device that meter the fuel air and
mixes them into harmonious mixture mixes them into harmonious mixture
before the mixture enters the before the mixture enters the
combustion chamber of an engine.combustion chamber of an engine.
a.a.GovernorGovernor
b.b.Air injectorAir injector
c.c.CarburetorCarburetor
d.d.All of the aboveAll of the above
Answer- Carburetor Answer- Carburetor

12. A device that permits the flow of fuel A device that permits the flow of fuel
and of burned gases in one direction and of burned gases in one direction
only.only.
a.a.Check valveCheck valve
b.b.Relief valveRelief valve
c.c.Spark plugSpark plug
d.d.None of the aboveNone of the above
Answer – Check valveAnswer – Check valve

13. An internal combustion engine that An internal combustion engine that
produces power in one revolution of produces power in one revolution of
the crankshaft.the crankshaft.
a.a.Four stroke cycle engineFour stroke cycle engine
b.b.Two stroke cycle engineTwo stroke cycle engine
c.c.Rotary engineRotary engine
d.d.None of the aboveNone of the above
Answer – Two stroke cycle Answer – Two stroke cycle

14. A device that provides ignition to a A device that provides ignition to a
gasoline engine.gasoline engine.
a.a.FlywheelFlywheel
b.b.Fuel injectorFuel injector
c.c.CarburetorCarburetor
d.d.Spark plugSpark plug
e.e.None of the aboveNone of the above
Answer – Spark plugAnswer – Spark plug

15. During the power stroke, which of During the power stroke, which of
the following valve is open?the following valve is open?
a.a.IntakeIntake
b.b.ExhaustExhaust
c.c.Intake and exhaustIntake and exhaust
d.d.None of the aboveNone of the above
Answer – None of the Answer – None of the
aboveabove

16. Number of spark plugs for 6 cylinder Number of spark plugs for 6 cylinder
diesel enginediesel engine
a.a.66
b.b.1212
c.c.44
d.d.None of the aboveNone of the above
Answer – None of the Answer – None of the
aboveabove

17. The volume displaced by a piston in The volume displaced by a piston in
making upward and downward making upward and downward
stroke.stroke.
a.a.Piston displacement volumePiston displacement volume
b.b.Clearance volumeClearance volume
c.c.Total volumeTotal volume
d.d.None of the aboveNone of the above
Answer – Piston displacement Answer – Piston displacement
volumevolume

18. At the downward stroke of two-stroke At the downward stroke of two-stroke
cycle, which of the events are taking place.cycle, which of the events are taking place.
a.a.Power & intakePower & intake
b.b.Compression & Compression &
exhaustexhaust
c.c.Power and exhaustPower and exhaust
d.d.None of the aboveNone of the above
Answer – None of the Answer – None of the
aboveabove

19. The ratio of the clearance volume The ratio of the clearance volume
from the total volume.from the total volume.
a.a.Compression ratioCompression ratio
b.b.Air fuel ratioAir fuel ratio
c.c.Bore stroke ratioBore stroke ratio
d.d.None of the aboveNone of the above
Answer – Compression RatioAnswer – Compression Ratio

20. Power transmitted to the pistons by Power transmitted to the pistons by
the gas in the cylinderthe gas in the cylinder
a.a.Brake horsepowerBrake horsepower
b.b.Indicated horsepowerIndicated horsepower
c.c.Drawbar horsepowerDrawbar horsepower
d.d.Flywheel horsepowerFlywheel horsepower
Answer – Indicated horsepowerAnswer – Indicated horsepower

21. Suppose a 4-cylinder engine has a Suppose a 4-cylinder engine has a
bore of 3.5 in. and a stroke of 4.0 in., bore of 3.5 in. and a stroke of 4.0 in.,
what is the engine displacement.what is the engine displacement.
a.a.154 in154 in
33
b.b.175 in175 in
33
c.c.225 in225 in
33
d.d.None of the aboveNone of the above
Answer – 154 in3Answer – 154 in3

22. An engine has piston displacement An engine has piston displacement
of 38.4 inof 38.4 in
33
. If the clearance volume of . If the clearance volume of
the cylinder is 2.5 inthe cylinder is 2.5 in
33
, what is the , what is the
compression ratio?compression ratio?
a.a.1:121:12
b.b.1:161:16
c.c.1:81:8
d.d.None of the aboveNone of the above
Answer – 1:16Answer – 1:16

23. Number of explosion of piston on a Number of explosion of piston on a
single cylinder, four stroke cycle single cylinder, four stroke cycle
engine in 100 revolution of the engine in 100 revolution of the
crankshaft.crankshaft.
a.a.100100
b.b.5050
c.c.2525
d.d.None of the aboveNone of the above
Answer – 50 explosionsAnswer – 50 explosions

24. A device that connects and A device that connects and
disconnects power input to the power disconnects power input to the power
output.output.
a.a.ClutchClutch
b.b.GearGear
c.c.PulleyPulley
d.d.None of the aboveNone of the above
Answer – ClutchAnswer – Clutch

25. The space when the piston is at the The space when the piston is at the
top dead centertop dead center
a.a.Piston displacement volumePiston displacement volume
b.b.Clearance volumeClearance volume
c.c.Total volumeTotal volume
d.d.None of the aboveNone of the above
Answer – Clearance volumeAnswer – Clearance volume

26. How many piston strokes are there in How many piston strokes are there in
one revolution of a crankshaft.one revolution of a crankshaft.
a.a.OneOne
b.b.TwoTwo
c.c.FourFour
d.d.None of the aboveNone of the above
Answer - TwoAnswer - Two

27. Engine having fuel injected into the Engine having fuel injected into the
combustion chamber near the end of combustion chamber near the end of
the combustion stroke and is ignited the combustion stroke and is ignited
by heat of compression only.by heat of compression only.
a.a.Gasoline engineGasoline engine
b.b.Diesel engineDiesel engine
c.c.Steam engineSteam engine
d.d.None of the aboveNone of the above
Answer - DieselAnswer - Diesel

28. Number of times the exhaust valve Number of times the exhaust valve
opens in 2-stroke cycle engine opens in 2-stroke cycle engine
running at 2000 rpm.running at 2000 rpm.
a.a.10001000
b.b.20002000
c.c.15001500
d.d.None of the aboveNone of the above
Answer – None of the Answer – None of the aboveabove

29. What is the indicated horsepower, of a What is the indicated horsepower, of a
four-stroke, six-cylinder engine having a four-stroke, six-cylinder engine having a
4” bore and 4” stroke. The engine speed 4” bore and 4” stroke. The engine speed
is 1500 rpm and the mean effective is 1500 rpm and the mean effective
pressure is 80 psi.pressure is 80 psi.
a.a.35 hp35 hp
b.b.45 hp45 hp
c.c.52 hp52 hp
d.d.None of the aboveNone of the above
Answer – 45 hpAnswer – 45 hp

30. The sequence by which the cylinder The sequence by which the cylinder
delivers the power stroke.delivers the power stroke.
a.a.Ignition Ignition
b.b.Firing orderFiring order
c.c.Flash pointFlash point
d.d.None of the aboveNone of the above
Answer – Firing orderAnswer – Firing order

31. Engine that burns fuel outside the Engine that burns fuel outside the
cylinder.cylinder.
a.a.Spark ignition engineSpark ignition engine
b.b.External combustion engineExternal combustion engine
c.c.Compression ignition engineCompression ignition engine
d.d.None of the aboveNone of the above
Answer – External combustion engineAnswer – External combustion engine

32. At the intake stroke of a diesel At the intake stroke of a diesel
engine, what come in?engine, what come in?
a.a.Fuel and airFuel and air
b.b.FuelFuel
c.c.AirAir
d.d.None of the None of the
aboveabove
Answer - AirAnswer - Air

33. A device that creates ignition of fuel A device that creates ignition of fuel
in a diesel engine.in a diesel engine.
a.a.Spark plugSpark plug
b.b.PistonPiston
c.c.CarburetorCarburetor
d.d.None of the None of the
aboveabove
Answer - PistonAnswer - Piston

34. Two pistons running at the same Two pistons running at the same
time in the same direction but time in the same direction but
performing different strokes.performing different strokes.
a.a.Running mateRunning mate
b.b.Firing orderFiring order
c.c.Valve timingValve timing
d.d.None of the aboveNone of the above
Answer – Running mateAnswer – Running mate

35. How many times the intake valve How many times the intake valve
opens in 4 stroke-cycle engine opens in 4 stroke-cycle engine
running at 2000 rpm.running at 2000 rpm.
a.a.10001000
b.b.20002000
c.c.500500
d.d.None of the aboveNone of the above
Answer – 1000 timesAnswer – 1000 times

36. Two-stroke six-cylinder-internal-combustion engine Two-stroke six-cylinder-internal-combustion engine
has a cylinder bore of 4 inches and a stroke of 4 has a cylinder bore of 4 inches and a stroke of 4
inches. If the engine is running at a speed of 1500 inches. If the engine is running at a speed of 1500
rpm, what is the indicated horsepower of the engine? rpm, what is the indicated horsepower of the engine?
The mean effective stroke is 80 psi.The mean effective stroke is 80 psi.
a.a.85 hp85 hp
b.b.92 hp92 hp
c.c.102 hp102 hp
d.d.None of the aboveNone of the above
Answer – 92 hpAnswer – 92 hp

37. Firing order of 4-cylinder engine.Firing order of 4-cylinder engine.
a.a.1-2-3-41-2-3-4
b.b.1-3-4-21-3-4-2
c.c.1-2-4-31-2-4-3
d.d.None of the aboveNone of the above
Answer – 1-3-4-2Answer – 1-3-4-2

38. A device which connects or A device which connects or
disconnects engine crankshaft to the disconnects engine crankshaft to the
transmission box or driven machine. transmission box or driven machine.
a.a.Differential gearDifferential gear
b.b.ClutchClutch
c.c.ActuatorActuator
d.d.None of the aboveNone of the above
Answer: ClutchAnswer: Clutch

39. Firing order for 6-cylinder engine Firing order for 6-cylinder engine
straight and V-piston.straight and V-piston.
a.a.1-5-3-6-2-41-5-3-6-2-4
b.b.1-4-2-6-3-51-4-2-6-3-5
c.c.1-2-3-4-5-61-2-3-4-5-6
d.d.None of the aboveNone of the above
Answer - Answer -

40. Firing order for 8-cylinder V pistonFiring order for 8-cylinder V piston
a.a.1-6-8-4-3-2-7-51-6-8-4-3-2-7-5
b.b.1-8-7-3-6-5-4-21-8-7-3-6-5-4-2
c.c.All of the aboveAll of the above
d.d.None of the aboveNone of the above
Answer – All of the aboveAnswer – All of the above

41. Engine mechanical efficiency.Engine mechanical efficiency.
a.a.Brake hp over indicated hpBrake hp over indicated hp
b.b.Rated hp over indicated hpRated hp over indicated hp
c.c.Friction hp over flywheel hpFriction hp over flywheel hp
d.d.None of the aboveNone of the above
Answer – Brake horsepower over Answer – Brake horsepower over
indicated horsepowerindicated horsepower

42. Number of times the intake valve Number of times the intake valve
opens in a single-cylinder four-stroke opens in a single-cylinder four-stroke
cycle after completing 200 cycle after completing 200
revolutions.revolutions.
a.a.200200
b.b.100100
c.c.5050
d.d.None of the aboveNone of the above
Answer – 100 timesAnswer – 100 times

43. What is the mechanical efficiency of What is the mechanical efficiency of
an engine having a brake horsepower an engine having a brake horsepower
of 8 hp and an indicated horsepower of 8 hp and an indicated horsepower
of 10 hp?of 10 hp?
a.a.20%20%
b.b.40%40%
c.c.60%60%
d.d.80%80%
e.e.None of the aboveNone of the above
Answer – 80%Answer – 80%

44. Part of an engine that converts Part of an engine that converts
reciprocating motion into rotary reciprocating motion into rotary
motion.motion.
a.a.CrankshaftCrankshaft
b.b.PistonPiston
c.c.Camshaft Camshaft
d.d.None of the aboveNone of the above
Answer - CrankshaftAnswer - Crankshaft

45. Engine system that reduces the Engine system that reduces the
temperature of the cylinder.temperature of the cylinder.
a.a.Ignition SystemIgnition System
b.b.Carburetor SystemCarburetor System
c.c.Cooling SystemCooling System
d.d.None of the aboveNone of the above
Answer – Cooling SystemAnswer – Cooling System

46. System of number indicating the System of number indicating the
ignition quality of diesel fuel.ignition quality of diesel fuel.
a.a.Octane ratingOctane rating
b.b.Cetane ratingCetane rating
c.c.Fuel indexFuel index
d.d.None of the aboveNone of the above
Answer – Cetane ratingAnswer – Cetane rating

47. Twenty-hp engine is equal to.Twenty-hp engine is equal to.
a.a.1524.44 kg-m/sec1524.44 kg-m/sec
b.b.1254.2 kg-m/sec1254.2 kg-m/sec
c.c.1425.44 kg-m/sec1425.44 kg-m/sec
d.d.None of the aboveNone of the above
Answer – 1524.44 kg-m/secAnswer – 1524.44 kg-m/sec

48. Ten-hp engine is equivalent toTen-hp engine is equivalent to
a.a.7.46 kw7.46 kw
b.b.76.4 watt76.4 watt
c.c.0.746 kw0.746 kw
d.d.None of the aboveNone of the above
Answer – 7.46 kWAnswer – 7.46 kW

49. A substance that decreases the effect A substance that decreases the effect
of friction and which is commonly of friction and which is commonly
obtained from petroleum products.obtained from petroleum products.
a.a.LubricantLubricant
b.b.Gear oilGear oil
c.c.GreaseGrease
d.d.All of the aboveAll of the above
Answer – All of the Answer – All of the
aboveabove

50. Gear oil is used forGear oil is used for
a.a.EngineEngine
b.b.Transmission boxTransmission box
c.c.Hydraulic systemHydraulic system
d.d.All of the aboveAll of the above
Answer – Transmission Answer – Transmission
BoxBox

51. Mean effective pressure for turbo-Mean effective pressure for turbo-
charge engine.charge engine.
a.a.300 psi300 psi
b.b.200 psi200 psi
c.c.400 psi400 psi
d.d.None of the aboveNone of the above
Answer – 300 psiAnswer – 300 psi

52. Engine valve that allows the entrance Engine valve that allows the entrance
of fuel. of fuel.
a.a.Exhaust valveExhaust valve
b.b.Intake valveIntake valve
c.c.Check valveCheck valve
d.d.None of the aboveNone of the above
Answer – Intake valveAnswer – Intake valve

53. If the compression ratio is 1:17, the If the compression ratio is 1:17, the
piston displacement volume for 10 piston displacement volume for 10
cmcm
33
piston clearance volume is piston clearance volume is
a.a.160 cc160 cc
b.b.170 cc170 cc
c.c.200 cc200 cc
d.d.None of the aboveNone of the above
Answer – 160 cm3Answer – 160 cm3

54. Standard throttling adjustment of an Standard throttling adjustment of an
engine.engine.
a.a.1/31/3
b.b.½½
c.c.¾¾
d.d.None of the None of the
aboveabove
Answer – 3/4Answer – 3/4

55. Mean effective pressure of an engine. Mean effective pressure of an engine.
a.a.120 psi120 psi
b.b.200 psi200 psi
c.c.50 psi50 psi
d.d.None of the aboveNone of the above
Answer – 120 psiAnswer – 120 psi

56. Number of pistons for 6 cylinder four Number of pistons for 6 cylinder four
stroke gasoline engine.stroke gasoline engine.
a.a.33
b.b.66
c.c.99
d.d.None of the aboveNone of the above
Answer – 6 pistonsAnswer – 6 pistons

57. Fuel for compression ignition Fuel for compression ignition
engine.engine.
a.a.GasolineGasoline
b.b.KeroseneKerosene
c.c.LPGLPG
d.d.None of the aboveNone of the above
Answer – None of the Answer – None of the
aboveabove

58. A term used to describe the A term used to describe the
resistance of oil to flow.resistance of oil to flow.
a.a.ViscosityViscosity
b.b.Cetane NumberCetane Number
c.c.Volume weightVolume weight
d.d.None of the aboveNone of the above
Answer - ViscosityAnswer - Viscosity

59. The speed of the engine is The speed of the engine is
automatically regulated by ______automatically regulated by ______
a.a.Hand leverHand lever
b.b.GovernorGovernor
c.c.FlywheelFlywheel
d.d.None of the aboveNone of the above
Answer - GovernorAnswer - Governor

60. Ignition timing for gasoline engine.Ignition timing for gasoline engine.
a.a.1-5 deg1-5 deg
b.b.5-10 deg5-10 deg
c.c.10-15 deg10-15 deg
d.d.None of the aboveNone of the above
Answer – 5 to 10Answer – 5 to 10

61. Ignition timing for diesel engine.Ignition timing for diesel engine.
a.a.5-12 deg 5-12 deg
b.b.17-19 deg17-19 deg
c.c.20-26 deg20-26 deg
d.d.None of the aboveNone of the above
Answer – 17-19 deg Answer – 17-19 deg

62. A type of engine that completes A type of engine that completes
power stroke in two revolution of the power stroke in two revolution of the
crankshaft.crankshaft.
a.a.Four-stroke cycle engineFour-stroke cycle engine
b.b.Two-stroke cycle engineTwo-stroke cycle engine
c.c.All of the aboveAll of the above
d.d.None of the aboveNone of the above
Answer – four strokes cycle engineAnswer – four strokes cycle engine

63. A type of engine that completes A type of engine that completes
power stroke in one revolution of the power stroke in one revolution of the
crankshaft.crankshaft.
a.a.Four-stroke cycleFour-stroke cycle
b.b.Two-stroke cycleTwo-stroke cycle
c.c.All of the aboveAll of the above
d.d.None of the aboveNone of the above
Answer – two stroke cycle Answer – two stroke cycle
engineengine

64. An engine that produce more power An engine that produce more power
per unit weight.per unit weight.
a.a.Four-stroke cycleFour-stroke cycle
b.b.Two-stroke cycleTwo-stroke cycle
c.c.All of the aboveAll of the above
d.d.None of the aboveNone of the above
Answer – two-strokeAnswer – two-stroke

65. An engine which uses oil entirely as An engine which uses oil entirely as
lubricant. lubricant.
a.a.Four-stroke cycleFour-stroke cycle
b.b.Two-stroke cycleTwo-stroke cycle
c.c.All of the aboveAll of the above
d.d.None of the aboveNone of the above
Answer – four stroke Answer – four stroke
cyclecycle

66. One horsepower can generate heat One horsepower can generate heat
energy equal toenergy equal to
a.a.2455 BTU/hr2455 BTU/hr
b.b.2545 BTU/hr2545 BTU/hr
c.c.2445 BTU/hr2445 BTU/hr
d.d.None of the aboveNone of the above
Answer – 2545 BTU/hrAnswer – 2545 BTU/hr

67. An engine basically hasAn engine basically has
a.a.Larger cylinder diameter Larger cylinder diameter
than piston diameterthan piston diameter
b.b.Equal piston diameter Equal piston diameter
than cylinder diameterthan cylinder diameter
c.c.Larger piston diameter Larger piston diameter
than cylinder diameterthan cylinder diameter
d.d.None of the aboveNone of the above
Answer: Larger cylinder Answer: Larger cylinder
diameter than piston diameter than piston
diameterdiameter

68. A part of an engine which reduces A part of an engine which reduces
vibration and stores energy.vibration and stores energy.
a.a.Spark plugSpark plug
b.b.Flywheel Flywheel
c.c.PistonPiston
d.d.None of the aboveNone of the above
Answer - FlywheelAnswer - Flywheel

69. If a 4-cylinder, 2-stroke-cycle internal-If a 4-cylinder, 2-stroke-cycle internal-
combustion engine has 600 explosion per combustion engine has 600 explosion per
minute, what is the engine rpm.minute, what is the engine rpm.
a.a.125 rpm125 rpm
b.b.150 rpm150 rpm
c.c.200 rpm200 rpm
d.d.None of the aboveNone of the above
Answer – 150 rpmAnswer – 150 rpm

70. Considering that the engine in item above has Considering that the engine in item above has
a piston diameter of 4” and piston stroke of 5”, a piston diameter of 4” and piston stroke of 5”,
what is the indicated horsepower of the engine what is the indicated horsepower of the engine
assuming a mean effective pressure of 102 psi.assuming a mean effective pressure of 102 psi.
a.a.9.7 hp9.7 hp
b.b.53.3 hp53.3 hp
c.c.28.5 hp28.5 hp
d.d.None of the aboveNone of the above
Answer – 9.7 hpAnswer – 9.7 hp

71. What is the brake horsepower of the What is the brake horsepower of the
engine in item above if the engine in item above if the
mechanical efficiency is 80 percent. mechanical efficiency is 80 percent.
a.a.8 hp8 hp
b.b.31 hp31 hp
c.c.35 hp35 hp
d.d.None of the aboveNone of the above
Answer – 8 hpAnswer – 8 hp

72. The indicated power of an engine is The indicated power of an engine is
69 horsepower. The brake 69 horsepower. The brake
horsepower is 54. What is the horsepower is 54. What is the
mechanical of engine efficiency? mechanical of engine efficiency?
a.a.69 %69 %
b.b.78 %78 %
c.c.59 %59 %
d.d.None of the None of the
aboveabove
Answer – 78%Answer – 78%

73. What is the thermal efficiency of an What is the thermal efficiency of an
engine which uses 0.6-lb of fuel per engine which uses 0.6-lb of fuel per
horsepower-hr. The fuel contain horsepower-hr. The fuel contain
20,000 BTU/lb.20,000 BTU/lb.
a.a.21.2 %21.2 %
b.b.34.5 %34.5 %
c.c.46.8 %46.8 %
d.d.None of the None of the
aboveabove
Answer – 21.2%Answer – 21.2%

74. The brake constant isThe brake constant is
a.a.2 2 ππ R/cR/c
b.b.2 2 ππ RNRN
c.c.2 2 ππ RFn/cRFn/c
d.d.None of the aboveNone of the above
Answer – 2 Answer – 2 ππ R/c R/c

75. What is the brake constant value of What is the brake constant value of
dynamometer whose length of arm is dynamometer whose length of arm is
equal to 1m?equal to 1m?
a.a.0.082 sec/kg0.082 sec/kg
b.b.0.82 sec/kg0.82 sec/kg
c.c.2.8 sec/kg2.8 sec/kg
d.d.None of the aboveNone of the above
Answer – 0.082 sec/kgAnswer – 0.082 sec/kg

76. A diesel engine four-stroke cycle with three cylinder A diesel engine four-stroke cycle with three cylinder
has a cylinder bore of 89 mm and a stroke of 130 mm. has a cylinder bore of 89 mm and a stroke of 130 mm.
The compression ratio is 16:1 and running at a speed The compression ratio is 16:1 and running at a speed
of 2000 rpm. What is the piston displacement of the of 2000 rpm. What is the piston displacement of the
engine per cylinder? engine per cylinder?
a.a.809 cc809 cc
b.b.1320 cc1320 cc
c.c.650 cc650 cc
d.d.None of the aboveNone of the above
Answer – 809 ccAnswer – 809 cc

77. What is the total power stroke per What is the total power stroke per
minute of the piston in item above?minute of the piston in item above?
a.a.20002000
b.b.30003000
c.c.500500
d.d.None of the aboveNone of the above
Answer: 3000 power Answer: 3000 power
stroke per minstroke per min

78. In item above, what is the total In item above, what is the total
displacement volume of the engine displacement volume of the engine
per min?per min?
a.a.9708 l/min9708 l/min
b.b.8534 l/min8534 l/min
c.c.9578 l/min9578 l/min
d.d.None of the aboveNone of the above
Answer – 9780 m/minAnswer – 9780 m/min

79. In item above, what is the piston In item above, what is the piston
speed of the engine?speed of the engine?
a.a.520 m/min520 m/min
b.b.660 m/min660 m/min
c.c.743 m/min743 m/min
d.d.None of the aboveNone of the above
Answer – 520 m/minAnswer – 520 m/min

80. In item above, what is the stroke-to-In item above, what is the stroke-to-
bore ratio of the engine?bore ratio of the engine?
a.a.1.001.00
b.b.1.321.32
c.c.1.461.46
d.d.None of the aboveNone of the above
Answer – 1.46Answer – 1.46

81. A four-cylinder gasoline engine has a cylinder A four-cylinder gasoline engine has a cylinder
diameter of 20 cm and a stroke of 40 cm. The diameter of 20 cm and a stroke of 40 cm. The
cylinders run at a speed of 150 rpm. The engine is a cylinders run at a speed of 150 rpm. The engine is a
four-stroke cycle with a mean effective pressure of 8 four-stroke cycle with a mean effective pressure of 8
kg/cmkg/cm
22
. What is the area of the piston? . What is the area of the piston?
a.a.314 cm314 cm
22
b.b.284 cm284 cm
22
c.c.167 cm167 cm
22
d.d.None of the aboveNone of the above
Answer – 314 cm2Answer – 314 cm2

82. What is the length of stroke of the What is the length of stroke of the
engine piston in meter in item engine piston in meter in item
above?above?
a.a.0.400.40
b.b.0.200.20
c.c.0.80.8
d.d.None of the aboveNone of the above
Answer – 0.40 mAnswer – 0.40 m

83. What is the power stroke of the What is the power stroke of the
engine per cylinder in item above? engine per cylinder in item above?
a.a.50 power stroke 50 power stroke
per min-cylinderper min-cylinder
b.b.75 power stroke 75 power stroke
per min-cylinderper min-cylinder
c.c.100 power stroke 100 power stroke
per min-cylinderper min-cylinder
d.d.None of the aboveNone of the above
Answer – 75 power Answer – 75 power
stroke per min-stroke per min-
cylindercylinder

84. What is the total power stroke of the What is the total power stroke of the
engine in item above? engine in item above?
a.a.150 150
b.b.300 300
c.c.75 75
d.d.None of the None of the
aboveabove
Answer - 300Answer - 300

85. What is the indicated horsepower of What is the indicated horsepower of
the engine?the engine?
a.a.46 hp46 hp
b.b.66 hp66 hp
c.c.56 hp56 hp
d.d.None of the None of the
aboveabove
Answer – 66 hpAnswer – 66 hp

86. If the engine mechanical efficiency, If the engine mechanical efficiency,
in item above, is 80 %, what is the in item above, is 80 %, what is the
brake horsepower of the engine? brake horsepower of the engine?
a.a.53 hp53 hp
b.b.35 hp35 hp
c.c.65 hp65 hp
d.d.None of the None of the
aboveabove
Answer – 53 hpAnswer – 53 hp

87. What is the stroke-to-bore ratio of the What is the stroke-to-bore ratio of the
engine in item above?engine in item above?
a.a.2.02.0
b.b.1.61.6
c.c.2.42.4
d.d.None of the None of the
aboveabove
Answer – 2.0Answer – 2.0

88. If a two-stroke 4-cylinder engine is If a two-stroke 4-cylinder engine is
running at 2000 rpm, the power running at 2000 rpm, the power
stroke per minute of the engine isstroke per minute of the engine is
a.a.40004000
b.b.80008000
c.c.20002000
d.d.None of the aboveNone of the above
Answer – 2000 strokes Answer – 2000 strokes
per minper min

89. Power available on human for useful Power available on human for useful
work.work.
a.a.0.1 hp0.1 hp
b.b.0.5 hp0.5 hp
c.c.0.3 hp0.3 hp
d.d.None of the aboveNone of the above
Answer – 0.1 hpAnswer – 0.1 hp

90. Domesticated animals used as power Domesticated animals used as power
for agriculture.for agriculture.
a.a.Dairy animalsDairy animals
b.b.Draft animalsDraft animals
c.c.Game animals Game animals
d.d.None of the aboveNone of the above
Answer – Draft animalsAnswer – Draft animals

91. A person is doing a work for 4 hours, A person is doing a work for 4 hours,
what is the power developed by the what is the power developed by the
person?person?
a.a.0.09 hp0.09 hp
b.b.0.13 hp0.13 hp
c.c.0.15 hp0.15 hp
d.d.None of the aboveNone of the above
Answer – 0.13 hpAnswer – 0.13 hp

92. Conversion of solid into combustible Conversion of solid into combustible
carbon monoxide through thermo-carbon monoxide through thermo-
chemical reaction.chemical reaction.
a.a.DigestionDigestion
b.b.CarbonizationCarbonization
c.c.GasificationGasification
d.d.PyrolysisPyrolysis
Answer - GasificationAnswer - Gasification

93. Power generated from moving air.Power generated from moving air.
a.a.Wind powerWind power
b.b.HydropowerHydropower
c.c.Photovoltaic cellPhotovoltaic cell
d.d.None of the None of the
aboveabove
Answer - WindpowerAnswer - Windpower

94. A gas produces putrefactive bacteria that A gas produces putrefactive bacteria that
breaks down organic material under airless breaks down organic material under airless
condition consisting mainly of methane and condition consisting mainly of methane and
carbon dioxide.carbon dioxide.
a.a.BiofuelBiofuel
b.b.BiogasBiogas
c.c.GasifierGasifier
d.d.LPGLPG
Answer - biogasAnswer - biogas

95. Wind is moving at 4 meters per Wind is moving at 4 meters per
second. If the rotor area is 2 square second. If the rotor area is 2 square
meters, what is the wind power?meters, what is the wind power?
a.a.80 watts80 watts
b.b.125 watts125 watts
c.c.95 watts95 watts
d.d.None of the aboveNone of the above
Answer – 80 wattsAnswer – 80 watts

96. Average power density of solar heat Average power density of solar heat
striking the earth surface.striking the earth surface.
a.a.1 kw/m1 kw/m
22
b.b.0.89 kw/m0.89 kw/m
22
c.c.0.58 kw/m0.58 kw/m
22
d.d.None of the aboveNone of the above
Answer – 0.89 kW/m2Answer – 0.89 kW/m2

97. One hundred liters per second of water is One hundred liters per second of water is
falling at a head of 10 meters. The falling at a head of 10 meters. The
turbine efficiency is 80%. What is the turbine efficiency is 80%. What is the
hydraulic power of the hydro system?hydraulic power of the hydro system?
a.a.8.7 kw8.7 kw
b.b.87 kw87 kw
c.c.7.8 kw7.8 kw
d.d.None of the aboveNone of the above
Answer – 7.8 kWAnswer – 7.8 kW

98. A device that converts kinetic energy A device that converts kinetic energy
of the wind to mechanical power.of the wind to mechanical power.
a.a.RotorRotor
b.b.GeneratorGenerator
c.c.MotorMotor
d.d.None of the aboveNone of the above
Answer - RotorAnswer - Rotor

99. A device that converts electricity to A device that converts electricity to
mechanical power.mechanical power.
a.a.RotorRotor
b.b.GeneratorGenerator
c.c.MotorMotor
d.d.None of the None of the
aboveabove
Answer - MotorAnswer - Motor

100. A device that converts electricity A device that converts electricity
from sunlight. from sunlight.
a.a.WindpumpWindpump
b.b.PhotovoltaicPhotovoltaic
c.c.GeneratorGenerator
d.d.None of the aboveNone of the above
Answer - PhotovoltaicAnswer - Photovoltaic

101. Wind machine that is used for lifting Wind machine that is used for lifting
water.water.
a.a.AeropumpAeropump
b.b.Wind turbineWind turbine
c.c.WIndpumpWIndpump
d.d.None of the aboveNone of the above
Answer - windpumpAnswer - windpump