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- When the line is parallel to any reference plane, projection in the same plane will appear as true length.
- When the line is parallel to any reference plane, projection in the other plane will be a horizontal line.
- When the line is perpendicular to any reference plane, projection in the same plane will appear as a point.
- When a line is perpendicular to any reference plane, projection in the other plane will be a vertical line.
MCQ on Projections of Lines
1) When a line is parallel to HP and VP, its top view is in the form of______a) Point b) True lengthc) Reduced length
d) None of these
2) When a line is parallel to HP and VP, its true length will be in______a) TV only b) FV onlyc) Both TV and FV
d) Side view
3) When a line is parallel to HP and inclined to VP, its true length will be in____a) TV only b) FV onlyc) Both TV and FV
d) Side view
4) When a line is parallel to HP and inclined to VP, its reduced length will be in_____a) TV only b) FV onlyc) SV only
d) both FV and SV
5) When a line is parallel to VP and inclined to HP, its true length will be in_____a) TV only b) FV onlyc) SV only
d) both FV and SV
6) When a line is parallel to VP and inclined to HP, its reduced length will be in_____a) TV only b) FV onlyc) SV only
d) both TV and SV
7) When a line is perpendicular to HP, it is parallel to______a) VP only b) PP onlyc) HP only
d) both VP and PP
8) IF the given line is perpendicular to VP, its true length will appear in_______a) VP only b) PP onlyc) HP only
d) both HP and PP
9) IF the given line is perpendicular to VP, the point will appear in_______a) VP only b) PP onlyc) HP only
d) both HP and PP
10) For given line AB, end point A is 20 mm above HP and end point B is 20 mm above HP, then this line is _______________a) Parallel to VP b) Parallel to HPc) Perpendicular to HP
d) Perpendicular to VP
11) For given line AB, end point A is 20 mm in front of VP and end point B is 30 mm in front of VP , then this line is_______________a) Parallel to VP b) Inclined to VPc) Perpendicular to HP
d) Perpendicular to VP
12) For the given line AB of length 60 mm, endpoint A is 20 mm in front of VP and endpoint B is 30 mm in front of VP, then front view __________a) Less than 60 mm b) Greater than 60 mmc) Equal to 60 mm
d) Can not say
13) For the given line AB of length 60 mm, endpoint A is 20 mm above HP and endpoint B is 20 mm above HP, then top view of this line is __________a) Less than 60 mm b) Greater than 60 mmc) Equal to 60 mm
d) Can not say
14) For the given line AB of length 60 mm perpendicular to VP, endpoint A is 20 mm above HP and endpoint B is 20 mm above HP, then the front view of this line is __________a) point b) Greater than 60 mmc) Equal to 60 mm
d) Can not say
15) Is it possible for any line that its top view and front view are in the form of point?a) Yes
b) No
16) If a given line is perpendicular to HP its top view is_____a) Larger than its actual length b) Smaller than its actual lengthc) Equal to its actual length
d) point
17) If a given line is perpendicular to VP its top view is_____a) Larger than its actual length b) Smaller than its actual lengthc) Equal to its actual length
d) point
c) Equal to its actual length
18) If a given line is parallel to the profile plane and inclined to both horizontal and vertical plane its projection of true length will be in____a) HP b) VPc) PP
d) None of the above
19) If a given line is perpendicular to the profile plane its projection in the form of point will be in_____a) HP b) VPc) PP
d) None of the above
20) If the projection of line appears as a point in HP, the line is parallel to_____a) PP b) VPc) both PP and VP
d) None of the above
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Option 4 : Vertical plane
Free
20 Questions 20 Marks 20 Mins
Explanation:
- When a line is parallel to one plane and inclined to the other, the projection of the line on the plane to which it is parallel will show its true length.
- The projected length on the plane to which it is inclined will always be shorter than the true length.
Additional Information
S. No. |
Orientation/Position of line |
Front view or elevation |
Top view or plan |
1. |
Line parallel to both H.P. and V.P. |
True length, parallel to xy |
True length, parallel to xy |
2. |
Line perpendicular to H.P. |
True length, perpendicular to xy |
Point |
3. |
Line perpendicular to V.P. |
Point |
True length, perpendicular to xy |
4. |
Line inclined at θ to H.P. and parallel to V.P. |
True length, inclined at θ to xy |
Shorter than the true length, parallel to xy |
5. |
Line inclined at ϕ to V.P. and parallel to H.P. |
Shorter than the true length, parallel to xy |
True length, inclined at ϕ to xy |
6. |
Line situated in H.P. and inclined at ϕ to V.P. |
Shorter than the true length, lying on xy |
True length, inclined at ϕ to xy |
7. |
Line situated in V.P. and inclined at θ to V.P. |
True length, inclined at θ to xy |
Shorter than the true length, lying on xy |
8. |
Line situated both in H.P. and V.P. |
Both front and top views are the true length and coincide on xy |
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