Section of solids, Computer Aided Machine Drawing (CAMD) of VTU Syllabus prepared by Hareesha N Gowda, Asst. Prof, Dayananda Sagar College of Engg, Blore. Please write to hareeshang@gmail.com for suggestions and criticisms.

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2. Typical Section Planes
&
Typical Shapes
Of
Sections.
Triangle Section Plane Ellipse
Section Plane
Through Generators
Through Apex
Section Plane Parallel
to end generator.
Ellipse
Cylinder through
generators.
Section PlaneHyperbola
Parallel to Axis.
Trapezium
Sq. Pyramid through
all slant edges

3. ILLUSTRATION SHOWING
IMPORTANT TERMS
IN SECTIONING.
For TV
SECTION
PLANE
TRUE SHAPE
Of SECTION
x
y
Apparent Shape
of section
SECTION LINES
(450 to XY)
SECTIONAL T.V.

4. SECTIONING A SOLID.
An object ( here a solid ) is cut by
some imaginary cutting plane
to understand internal details of that object.
OBSERVER
UPPER PART
REMOVED
(A)
The action of cutting is called
SECTIONING a solid
&
The plane of cutting is called
SECTION PLANE.

5. Section plane perpendicular to VP and Parallel to HP
Projection of the section plane on VP
VP
S
HP
Section plane perpendicular to
VP and Parallel to HP
S
VP
HP
Top View in Section

6. Section plane perpendicular to VP and inclined to HP
Projection of the section plane on VP
VP
VP
HP
HP
Top View in Section
Section plane perpendicular to VP and Inclined to HP

7. Section plane perpendicular to HP and Parallel to VP
Front View in Section
VP
VP
HP
HP
Section plane perpendicular
to HP and parallel to VP
S
S
Projection of the section plane on HP

8. Section plane perpendicular to HP and inclined to VP
Front View in Section
VP
HP
VP
HP
Section plane perpendicular
to HP and inclined to VP
Projection of the section plane on HP

9. Section plane perpendicular to both HP and VP
Side View in Section
S
VP
RPP
X
S
HP
VP
HP
S
Section plane perpendicular
to both HP and VP
Y
S

10. Section of Solids
• A triangular pyramid, base 40mm sides and axis 60mm long,
resting on its base on the HP with one of its edges parallel to
the VP. A section plane passing through one of the base
corners of the pyramid and the two slant edges at 20mm and
30mm above HP cuts the pyramid. Draw the front view,
sectional top view and true shape of the section. Determine
the inclination of the section plane with the reference plane.
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11. A triangular pyramid, base 40mm sides and axis 60mm long, resting on its base on the
HP with one of its edges parallel to the VP. A section plane passing through one of the
base corners of the pyramid and the two slant edges at 20mm and 30mm above HP
cuts the pyramid. Draw the front view, sectional top view and true shape of the
section. Determine the inclination of the section plane with the reference plane.
• Draw XY Line, mark HP and VP.
V
P
X
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Y
H
P
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12. A triangular pyramid, base 40mm sides and axis 60mm long, resting on its base on the
HP with one of its edges parallel to the VP. A section plane passing through one of the
base corners of the pyramid and the two slant edges at 20mm and 30mm above HP
cuts the pyramid. Draw the front view, sectional top view and true shape of the
section. Determine the inclination of the section plane with the reference plane.
• Draw Top view and Front
View, Mark points
60
o'
V
P
X
c'
a' (o1
')
b'
H
P
b
o(o1
)
40
c
Y
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a
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13. A triangular pyramid, base 40mm sides and axis 60mm long, resting on its base on the
HP with one of its edges parallel to the VP. A section plane passing through one of the
base corners of the pyramid and the two slant edges at 20mm and 30mm above HP
cuts the pyramid. Draw the front view, sectional top view and true shape of the
section. Determine the inclination of the section plane with the reference plane.
o'
60
•
V
P
X
1
'
c'
Show the Section plane, draw vertical
projectors to the top view and obtain
section pints in the top view.
2'
a' (o1
')
3' b'
H
P
1 o(o1
)
3b
40
c
Y
2
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a
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14. A triangular pyramid, base 40mm sides and axis 60mm long, resting on its base on the
HP with one of its edges parallel to the VP. A section plane passing through one of the
base corners of the pyramid and the two slant edges at 20mm and 30mm above HP
cuts the pyramid. Draw the front view, sectional top view and true shape of the
section. Determine the inclination of the section plane with the reference plane.
60
o'
V
P
X
1
'
c'
• Show the sectional top
view
2'
a' (o1
')
3' b'
1
3b
H
P
c
Y
40
o(o1
)
2
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a
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15. A triangular pyramid, base 40mm sides and axis 60mm long, resting on its base on the
HP with one of its edges parallel to the VP. A section plane passing through one of the
base corners of the pyramid and the two slant edges at 20mm and 30mm above HP
cuts the pyramid. Draw the front view, sectional top view and true shape of the
section. Determine the inclination of the section plane with the reference plane.
• Show the Auxiliary inclined
plane, parallel to section plane,
draw perpendiculars from the
section pints to the auxiliary
inclined plane, measure the
distances from XY line to
section points in the top view
X
1
60
o'
1
'
2'
X
2
a' (o1
')
3' b'
1
3b
Y
21
,71
H
P
27,48
c
o(o1
)
40
X
c'
48,65
V
P
2
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a
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16. A triangular pyramid, base 40mm sides and axis 60mm long, resting on its base on the
HP with one of its edges parallel to the VP. A section plane passing through one of the
base corners of the pyramid and the two slant edges at 20mm and 30mm above HP
cuts the pyramid. Draw the front view, sectional top view and true shape of the
section. Determine the inclination of the section plane with the reference plane.
2''
1
''
X
1
o'
60
3''
1
'
2'
X
2
a' (o1
')
3' b'
1
3b
Y
21
,71
H
P
27,48
c
o(o1
)
40
X
c'
48,65
V
P
• Reproduce the distances
of the top view section
points from XY line in to
Auxiliary plane, mark
points, 1’’, 2’’ and 3’’, join
these three points.
2
a
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17. A triangular pyramid, base 40mm sides and axis 60mm long, resting on its base on the
HP with one of its edges parallel to the VP. A section plane passing through one of the
base corners of the pyramid and the two slant edges at 20mm and 30mm above HP
cuts the pyramid. Draw the front view, sectional top view and true shape of the
section. Determine the inclination of the section plane with the reference plane.
• Make visible edges, Retaining portion dark
• Show the annotation. Show ans. if Any
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