DHANALAKSHMI COLLEGE OF ENGINEERING
Dr. V.P.R. Nagar, Manimangalam,
Chennai 601 301.
Assignment 2
Unit-II
Projections of Points
1. State the projection of points representing their quadrants and positions. All dimensions are in mm
2. Draw the projections of the following points on a common reference line. Take 30mm distance between the projections.
i) A, 35mm above HP and 25mm in front of VP
ii) B, 40mm below HP and 15mm behind VP.
iii) C, 50mm above HP and 25mm behind VP
iv) D, 45 below HP and 25mm behind VP
v) E, 30mm behind VP and on HP
Projections of Straight Lines
3. A
line AB has its end A 20mm above HP and 25mm in front of VP. The other
end B is 45mm above HP and 55mm in front of VP. The distance between
the end projectors is 60mm. Draw its projections. Also find the true
length and true inclinations of the line with HP and VP.
4. The
top view of a line is 65mm long and is inclined at 30º to the reference
line. One end is 20mm above HP and 10mm infront of VP. The other end is
60mm above HP and is infront of VP. Draw the projections and find the
true length of the line and its inclinations to HP and VP.
5. The
distance between the projectors of two points A and B is 70mm. Point A
is 10mm above HP and 15mm infront of VP. Point B is 50mm above HP and
40mm infront of VP. Find the shortest distance between A and B, by
rotating line method. Measure the true inclinations of the AB with VP
and HP.
6. A
straight line AB has its end A 20mm above HP and 25mm in front of VP.
The other end B is 60mm above HP and 65mm in front of VP. The ends of
the line are on the same projectors. Draw its projections. Find the true
length, true inclinations of the line with HP and VP.
7. The end ‘P’ of a PQ, 70mm long is 15mm above the HP and 20mm in front of the VP. Q is 40mm above the HP. Its plan is inclined at 45° to the VP. Draw the projections of the line and find its true inclinations with VP and HP.
8. A
line PQ has its end P in HP and 40 mm in front of VP. Its front view is
inclined is inclined at 50˚ to XY and has a length of 70 mm. The other
end B is in VP. Draw its projections.
9. A line AB 85 mm long has its end A 25 mm away from both reference planes and is in first quadrant of the line inclined at 500 to HP and 300 to VP. Draw its projections. Find its view lengths & apparent inclinations
10. A line AB 100mm long has its front view inclined at an angle of 450
to the reference line separating the views. The end A is in VP and 25
mm above HP. The length of the front view is 60 mm. Draw the top view of
the line and find the true inclinations of the line with the HP and VP.
Projections of Planes
11. A
pentagonal lamina of side 30mm is resting on HP with one of its corner.
The surface is at 60˚ to HP. The edge opposite to this corner is
parallel to VP and further nearer to it. Draw its projections.
12. A
circular lamina of 60mm diameter rests on HP on a point 1 on
circumference. The lamina is inclined to HP such that the top view of it
is an ellipse of minor axis 35mm. The top view of the diameter through
the point 1 makes an angle of 45˚ with VP. (i) Draw the projections. (ii) Determine the angle made by the lamina with HP.
13. A
hexagonal plate of side 30mm has one of its corners on HP and the
opposite corner on VP. The plate makes an angle of 60º with HP and 30º
with VP. Draw the projections of the plate.
14. Draw the projections of a pentagonal sheet of 26mm side, having its surface inclined at 30˚ to VP. Its one side is parallel to VP and inclined at 45˚ to HP.
SUBMISSION DATE: 26.11.12
No comments:
Post a Comment