EG UNIT-IV SECTION OF SOLIDS.ppt

VERY USEFUL

1. GE 8152 -ENGINEERING GRAPHICS
Dr.R.Ganesamoorthy.
Professor / Mechanical Engineering.
Chennai Institute of Technology.
GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
UNIT-IV SECTION OF SOLIDS

2. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
What is Section ofSolids:
Sectionsandsectionalviewsareusedtoshowhiddendetailmore
clearly.They-arecreatedbyusingacuttingplanetocuttheobject.
Asectionisaviewofnothicknessandshowstheoutlineoftheobject
atthecuttingplane.Visibleoutlinesbeyondthecuttingplanearenot
drawn.
Asectionalview,displaystheoutlineofthecuttingplaneandallvisible
outlineswhichcanbeseenbeyondthecuttingplane.

3. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
Section of Solids Objectives:
This session will help you tolearn
The need for sectioning.
How a cutting plane can bedescribed.
How the true shape of an apparent section can bedescribed.
How the frustum of a solid can bedescribed.
How the sectional views of solids may bedrawn.

4. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
Types of Section Views:
Fullsections
Halfsections
Offsetsections
Revolvedsections
Removedsections
Broken-outsections

5. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
Types of Section Views:
CuttingPlane
Sectionviewsshowhowanobjectwouldlookifacuttingplane(orsaw)
cutthroughtheobjectandthematerialinfrontofthecuttingplanewas
discarded.
Representationofcuttingplane
Accordingtodrawingstandardscuttingplaneisrepresentedbychain
linewithalternatelongdashanddot.Thetwoendsofthelineshouldbe
thick.

6. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
Types of Section Views:
Full Section View
In a full section view, the cutting plane cuts across the entire object
Note that hidden lines become visible in a section view
Hatching
Onsectionsandsectionalviewssolidareashouldbehatchedtoindicate
thisfact.Hatchingisdrawnwithathincontinuousline,equallyspaced
(Preferablyabout4mmapart,thoughneverlessthan1mm)and
preferablyatanangleof45degrees

7. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
Types of Section Views:
Frustum of a solid and Truncated solid:
When a solid is cut by a cutting plane parallel to its base, theportion
Obtained after removingthe top portion is called "Frustum".
Whenasolidiscutbyacuttingplaneinclinedtoitsbase,theportion
obtainedafterremovingthetopportioniscalledthe"truncated"solid.

8. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
Types of Sectional Views for Solids:
By using the five different types of perpendicular section planes we obtain
the following five types of sectional views of solids:
1.Cutting plane is obtained by horizontal planes.
2.Cutting plane is obtained by vertical planes.
3.Cutting plane is obtained by auxiliary inclined planes.
4.Cutting plane is obtained by auxiliary vertical planes.
5.Cutting plane is obtained by profile planes.

9. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
Types of Sectional Views : Perpendicular to the VP & Parallel to theHP
1. A pentagonal pyramid of base 25mm and height 55mm rests with its base on the HP
such that one of its edges is perpendicular to the VP. A section plane parallel to the HP
and perpendicular to the VP cuts the pyramid at 20mm from the apex.

10. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
Types of Sectional Views : Perpendicular to the VP & Parallel to theHP
2. A hexagonal pyramid of base side 25 mm and altitude 55 mm rests on its base on
the HP with two edges of the base parallel to the VP. A cutting plane parallel to the HP
cuts the pyramid at a height of 25 mm above the base. Draw the front and sectional top
view.

11. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
Types of Sectional Views : Perpendicular to the VP & Parallel to theHP
3.Aconeofbasediameter40mmandaltitude50mmrestsonitsbaseontheHP.It’s
cutbyaplaneparalleltotheHPat25mmabovethebase.Drawthesectionaltop
view.

12. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
Types of Sectional Views : Perpendicular to the VP & Parallel to theHP
4.Acylinderwith50mmbasediameterand60mmlongaxisisrestingonitsbaseon
HP.Itiscutbyasectionplaneparalleltoand40mmaboveHP.Drawitsfrontviewand
sectionaltopview.

13. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
Types of Sectional Views : Perpendicular to the HP and Parallel to theVP
5.Acubeofside35mmrestsontheHPononeofitsfaceswithaverticalfaceinclined
at45
0totheVP.AplaneperpendiculartoHPandparalleltoVPcutsthecube10mm
awayfromtheaxisandfurtherawayfromtheVP.Drawthetopandsectionalfront
view.

14. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
Types of Sectional Views : Perpendicular to the HP and Parallel to theVP
6.Acylinderof45mmdiameterand60mmheightstandsverticallywithitsbaseonHP.
ItiscutbyaplaneperpendiculartoHPandparalleltoVP,atadistanceof15mmfrom
theaxis.Drawitstopandsectionalfrontview.

15. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
Types of Sectional Views : Perpendicular to the HP and Parallel to theVP
7.Aconeofbasediameter40mmandaltitude50mmrestsonitsbaseontheHP.Itis
cutbyaverticalplaneparalleltotheVPatadistanceof10mmfromtheaxis.Theaxis
nearertotheVPthanthecuttingplane.Drawthetopandsectionalfrontview.

16. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
Types of Sectional Views : Perpendicular to the HP and Parallel to theVP
8.Ahexagonalprismhavingbasewith35mmsideand65mmlongislyingonitsbase
inHPandoneofitsrectangularfacesparalleltoVPandaxisperpendiculartoHP.Itis
cutbyaplaneat20mmfromtheaxisandtowardstheobserver.Drawthetopand
sectionalfrontview.

17. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
Types of Sectional Views : Perpendicular to the HP and Parallel to theVP
9.Acubeofside45mmrestwithafaceontheHPsuchthatoneofitsfaceswitha
verticalfaceinclinedat30
0totheVP.AsectionplaneparalleltoVPcutsthecube
distanceof15mmfromtheverticaledgenearertotheobserver.Drawthetopand
sectionalfrontview.

18. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
Types of Sectional Views : Cutting plane perpendicular to both HP and VP
10.Apentagonalpyramidofbaseside25mmandaltitude50mmrestsonitsbaseon
theHPwithanangleofbaseperpendiculartotheVP.Itiscutbyaplaneperpendicular
tobothHPandVP.Thecuttingplanecutstheobjectat12mmrightoftheaxis.Draw
thefront;topandsectionalrightsideofthepyramid.

19. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
Types of Sectional Views : Cutting plane perpendicular to both HP and VP
11.Aconeofbasediameter40mmandaltitude50mmrestsononeofitsbaseonHP.
ItiscutbyasectionplaneperpendiculartobothHPandVP,10mmtotherightofthe
axis.Drawthefront;topandsectionalrightside.

20. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
TypesofSectionalViews:CuttingplaneperpendiculartoVPandinclinedtoHP
13.Acubeofside35mmrestsontheHPononeofitsfaceswithaverticalface
inclinedat45
0totheVP.ItiscutbyaplaneperpendiculartotheVPandinclinedat30
0
totheHPandmeetingtheaxisat25mmabovetheHP.Drawthefrontview,sectional
topviewandthetrueshapeofthesection.

21. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
TypesofSectionalViews:CuttingplaneperpendiculartoVPandinclinedtoHP
14.Apentagonalpyramidofbaseside25mmandaltitude50mmrestsonitsbaseon
theHPwithoneofthebaseedgesperpendiculartotheVP.Itiscutbyaplaneinclined
at45
0tothebase.Thecuttingmeetstheaxisat20mmabovethebase.Drawthefront
view,sectionaltopviewandthetrueshapeofthesection.

22. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
TypesofSectionalViews:CuttingplaneperpendiculartoVPandinclinedtoHP
15.Ahexagonalprismofbaseside25mmandaxislength55mmisrestingonHPon
oneofitsbaseswithtwooftheverticalfacesperpendiculartoVP.Itiscutbyaplane
inclinedat50
0tothetopbase.Drawitsfrontview,sectionaltopviewandtrueshapeof
section.

23. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
TypesofSectionalViews:CuttingplaneperpendiculartoVPandinclinedtoHP
16.Aconeofbasediameter40mmandaxislength50mmrestingonHPonitsbaseis
cutbyaplaneinclinedat45
0toHPandperpendiculartoVPandisbisectingtheaxis.
Drawitsfrontview,sectionaltopviewandtrueshapeofsection.

24. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
TypesofSectionalViews:CuttingplaneperpendiculartoVPandinclinedtoHP
17.Apentagonalpyramidofbaseside30mmandaltitude60mmrestswithitsbaseon
HPandwithasideofbaseparalleltoVP.Itiscutbyasectionplaneperpendicularto
VPandinclinedat35
0totheHPandbisectingtheaxis.Drawthesectionalplanofthe
pyramidandthetrueshapeofthesection.

25. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
TypesofSectionalViews:CuttingplaneperpendiculartoVPandinclinedtoHP
18.Asquarepyramidofbaseside50mmandheight65mmisrestingonHPwitha
baseedgeparalleltoVP.ItiscutbyaplaneperpendiculartoVPinclinedtoHPsuch
thatthetrueshapeisatrapeziumofsides42mmand22mm.Drawtheprojectionand
findtheangleofcuttingplane.

26. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
TypesofSectionalViews:CuttingplaneperpendiculartoVPandinclinedtoHP
19.Acylinderof42mmdiameterandaxis55mmheightisrestingonthegroundonits
base.ItiscutbyaplaneperpendiculartoVPinclinedat35
0toHPandmeettheaxisat
apoint20mmfromthetop.Drawthesectionalplanandtrueshape

27. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
TypesofSectionalViews:CuttingplaneperpendiculartoVPandinclinedtoHP
20.Acylinderofdiameter48mmandaxis65mmrestsonitsbaseontheground.A
planecutsitperpendiculartotheVPandinclinedat45
0toHP.Thecuttingplanemeets
theaxisatadistanceof16mmfromthetop.DrawthesectionalPlaneandtrueshape
ofsection.

28. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
TypesofSectionalViews:CuttingplaneperpendiculartoVPandinclinedtoHP
21.Aconeofdiameter60mmandheight70mmislyingonthegroundverticallyItiscut
byaplaneperpendiculartoVPinclinedat78
0toHPandpassesthroughtheapex.Draw
thesectionalPlaneandtrueshapeofsection.

29. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
TypesofSectionalViews:CuttingplaneperpendiculartoVPandinclinedtoHP
22.Apentagonalpyramidofbaseside25mmandaltitude60mmonitsbaseontheHP
withoneofthebaseedgesperpendiculartotheVP.itiscutbyaplaneinclinedat50
0to
thebase.Thecuttingplanemeetstheaxisat15mmabovethebase.Drawthe
sectionalPlaneandtrueshapeofsection.

30. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
TypesofSectionalViews:CuttingplaneperpendiculartoVPandinclinedtoHP
23.Aconeofdiameter50mmandheight65mmisrestingonthebaseonHP.Itiscut
byasectionplanesuchthatthetrueshapeproducedisaparabolaofbase35mm.
DrawthesectionalPlaneandtrueshapeofsection.

31. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
TypesofSectionalViews:CuttingplaneperpendiculartoVPandinclinedtoHP
24.Ahexagonalpyramidofbaseside25mmandaltitude70mmrestsonitsbaseon
theHPwithtwoofitsbasesideparalleltotheVP.Itiscutbyaplaneperpendicularto
VPinclinedat45
0toHPandpassingthroughapoint15mmabovethebaseand
locatedontheaxis.Drawthesectionalviewandthetrueshapeofthesection.

32. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
TypesofSectionalViews:CuttingplaneperpendiculartoVPandinclinedtoHP
25.Ahexagonalpyramidofbaseside25mmandaltitude70mmhasthehexagonal
endonVPwithtwoofitsedgesperpendiculartoHP.Itiscutbyaplaneperpendicularto
VPinclinedat30
0toHPcutsthepyramidatapoint8mmfromtheaxisandabove.
Drawthesectionalviewandthetrueshapeofthesection.

33. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
TypesofSectionalViews:CuttingplaneperpendiculartoVPandinclinedtoHP
26.Apentagonalpyramidofbaseside25mmandaltitude50mmrestswithitsbaseon
HPandwithasideofbaseperpendiculartoVP.Itiscutbyasectionplane
perpendiculartoVPsuchthatthetrueshapeofthesectionisanisoscelestriangleof
themaximumpossiblebaseandmaximumheight.Drawthesectionalplanofthe
pyramidandthetrueshapeofthesectionandmeasuretheinclinationofthecutting
planewithHP.

34. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
TypesofSectionalViews:CuttingplaneperpendiculartoHPandinclinedtoVP
27.Ahexagonalprismofbaseside25mmandaltitude50mmrestononeofitsends
onHPwithtworectangularfacesparalleltoVP.ItiscutbyaplaneperpendiculartoHP
inclinedat50
0toVP,atadistanceof10mmfromtheaxis.Drawthesectionalviewand
thetrueshapeofthesection.

35. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
TypesofSectionalViews:CuttingplaneperpendiculartoHPandinclinedtoVP
28.Arightcircularconeofbasediameter45mmandaxislength55mmrestsonits
baseonHP.ItiscutbyaplaneperpendiculartoHPinclinedat55
0toVP,theshort
distancebetweenthecuttingplaneandtopviewoftheaxis10mm.Drawthesectional
viewandthetrueshapeofthesection.thetrueshapeofthesection.

36. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
TypesofSectionalViews:CuttingplaneperpendiculartoHPandinclinedtoVP
29.Apentagonalprismofbaseside30mmandaltitude60mmrestononeofitsends
onHPwithoneofitsrectangularfaceswithaxisperpendiculartoVP.Itiscutbyaplane
perpendiculartoHPinclinedat50
0toVP,thecuttingplanemeetsthemidpointofthe
prism.Drawthesectionalviewandthetrueshapeofthesection.

37. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS
TypesofSectionalViews:CuttingplaneperpendiculartoHPandinclinedtoVP
30.Acylinderofdiameter50mmandaxis60mmrestsonitsHPononeofits
generatorswithitsaxisperpendiculartoVP.AplanecutsitperpendiculartotheHPand
inclinedat35
0toVPandbisectingaxisofthecylinder.DrawthesectionalPlaneand
trueshapeofsection.

38. GE8152-ENGINEERING GRAPHICS UNIT-IV SECTION OF SOLIDS