2. sectional views

Engineering Drawing of 14

Topic No :2 Section of solids

II Vimal Patel IIMechanical Engineering Department, SVNIT, Surat - 395007

Ph. No.:- +919099573650 E Mail :- [email protected]

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Ex.1 A pentagonal prism, side of base 30 mm and axis length 65 mm, has edges of its base onH.P. and the axis parallel to V.P. and inclined at 600 to the H.P. A section plane with itsH.T. perpendicular to XY line and V.T. inclined at 600 to XY line and passing through thehighest corner cuts the prism. Draw the sectional plan and true shape of section.

2 Section of solids





Ex.2 A hexagonal prism, side of base 25 mm and axis length 65 mm, has an edge of is base onH.P. and the axis parallel to the V.P. and inclined at 600 to the H.P. A section plane,perpendicular to H.P. and inclined at 450 to V.P. cuts the solid. Section plane is passingthrough a point on axis at a distance of 20 mm from the top end of the axis. Drawsectional F.V. and true shape of section.





Ex.3 A cylindrical glass jar, diameter of base 60 mm and height 75 mm, is completely filledwith water. It is then tilted on the rim of its base in such a manner so that half the waterdrains out. Draw the projections of the cylindrical glass jar showing remaining water init.





Ex.4 A square pyramid, side of base 30 mm and axis 40 mm long is kept on its base on theH.P. with the sides of base equally inclined to the V.P. It is cut by the section planeperpendicular to the V.P., inclined at 450 to the H.P. and passing through a point on theaxis 25 mm below the apex. Draw the F.V., sectional T.V., Sectional S.V. and true shapeof section.





Ex.5 A pentagonal pyramid has is axis perpendicular to the H.P. and side of base parallel tothe V.P. It is cut by two cutting planes, one of which is inclined at 450 to the H.P. andcuts the axis 65 mm from the vertex. The other plane which is parallel to the H.P. cutsthe axis 75 mm from the vertex. (Projection of the pyramid between these two cuttingplanes is vertical). Assume that the side of the base is 40 mm and height 100 mm. Drawelevation, sectional plan, sectional end view from right and true shape of section.





Ex.6 A pentagonal pyramid, side of base 40 mm and height 75 mm, is resting on H.P. on oneof its edge of base with axis parallel to V.P. and inclined to H.P. by 600. It is cut by ahorizontal section plane passing through the highest corner of the base. Draw elevationand sectional plan of the pyramid.





Ex.7 A pentagonal pyramid, side of base 40 mm and height 75 mm, is resting on H.P. on oneof its base corners, with the base making an angle of 450 with the H.P. and two baseedges containing that corner equally inclined to the ground (H.P.). It is cut by a sectionplane such that the H.T. and the V.T. of which are perpendicular to the XY line andpasses through the corner on which it is resting. Draw the F.V., T.V. and sectional lefthand side view retaining the base. Indicate true shape of section.





Ex.8 Figure shows the elevation of cone, with the offset planes cutting the cone (cutting planesC1P1 and C2P2). Draw the sectional plan, true shape of the sections and sectional end view.Assume object is in first quadrant.





Ex.9 A cone of base diameter 70 mm and axis length 90 mm is lying on one of its generators onH.P. with its axis parallel to V.P. It is cut y a section plane inclined at an angle of 300 to theH.P. and perpendicular to V.P. and passes through a point on axis 30 mm from base. Drawthe F.V., sectional T.V. and true shape of the section.





Ex.10 A cone of base diameter 60 mm and axis length 75 mm is kept on the ground on one of itsgenerator so that the axis is parallel to the V.P. It is cut by a section plane perpendicular tothe H.P., inclined at 300 to the V.P. and intersecting the axis at a point 30 mm from apex.Draw the T.V., sectional F.V. and true shape of section.





Ex.11 A glass tumbler is in the form of frustum of a cone, the top and bottom diameters being120 and 50 mm. respectively with the height 100 mm. It is completely filled up with water.It is then tilted on the rim of its bottom face, in such a way that its axis remains at 450tothe H.P. Obtain the projections, if the glass tumbler is resting on H.P.





Ex.12 A right circular cylinder, base 60 mm diameter and 100 mm long axis has a square hole of30 mm side cut through it centrally, the axis of the hole coinciding with the axis ofcylinder. The cylinder is kept lying on H.P. on a generator with its axis inclined at 300 toV.P. and the faces of the hole equally inclined to H.P. It is by a vertical section plane, theH.T. of which is parallel to XY, passing through a point on the axis 20 mm from one end.Draw its elevation and plan, retaining the major portion of the solid.





Ex.13 A right circular cone, diameter of base 60 mm and height 60 mm stands centrally on itscircular base, over a circular disc of diameter 100 mm and 30 mm thick. An auxiliaryinclined plane inclined at 450 to the H.P. and normal to V.P., cuts both the solids andintersects the axis on the cone. Draw the sectional plan and true shape of the section.





Ex.14 A pentagonal prism is resting on H.P. on one of its rectangular face with axis of the prismparallel to H.P. and V.P. both. It is cut by Auxiliary vertical plane perpendicular to H.P.and inclined to V.P. by 450 passing through a point on the axis 15 mm from one end. Drawthree principal projections with sections and draw the true shape of section. Take side ofbase 45 mm and height 80 mm.

2. sectional views

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