This set of Engineering Drawing Multiple Choice Questions & Answers (MCQs) focuses on “Projection of Line Contained by Plane”.

1. A line AB is on the vertical plane of projection planes, which view from the following gives the actual length of the line AB?

a) Front view

b) Top view

c) Side view

d) Isometric view

View Answer

Explanation: Any line that lie or parallel to any of plane in projection planes the true length will be found at view which drawn on to that plane that is here the line is in vertical plane so the view which fall on vertical plane gives the true length which is other than front view.

2. A line AB is on the horizontal plane inclined to a vertical plane at 45 degrees, which view from the following gives the actual length of the line AB?

a) Front view

b) Top view

c) Side view

d) Isometric view

View Answer

Explanation: Any line that lie or parallel to any of plane in projection planes the true length will be found at view which drawn on to that plane that is here the line is in horizontal plane though it is inclined with other planes the true length will be given at view which fall on horizontal plane which is top view.

3. A line AB is on the profile plane inclined such that ends of line are 10, 12 cm away from horizontal plane, which view from the following gives the actual length of the line AB?

a) Front view

b) Top view

c) Side view

d) Isometric view

View Answer

Explanation: Any line that lie or parallel to any of plane in projection planes the true length will be found at view which drawn on to that plane that is here the line is in profile plane though it’s ends are at some distance the true length will be given at view which fall on profile plane which is side view.

4. A line PQ lie in both the vertical plane and profile plane the front and side views of that line coincides at vertical reference line.

a) True

b) False

View Answer

Explanation: Given a line present in both the planes but it is known that two perpendicular planes meet at a line which is reference line so the given line might present on that line that coincides with that line so the views also get coincide at that line.

5. If a line RS lie on both vertical and horizontal plane then which of the following two views coincides to give a line again?

a) Front, Top

b) Top, Side

c) Side, Isometric

d) Isometric, Front

View Answer

Explanation: Isometric view is that the three dimensions of a solid are not only shown in one view. Here given the line is present in vertical and horizontal plane so the line will coincide in the front view and top view.

6. If a line LM lies on profile plane and horizontal plane then which of the following two views coincides to give a line again?

a) Front, Top

b) Top, Side

c) Side, Isometric

d) Isometric, Front

View Answer

Explanation: Given the line LM is present in both the profile and horizontal planes which are perpendicular so the line will be at reference line formed between them also the line will coincide with the view of top and side.

7. If a line AB lies on horizontal plane and vertical plane then which of the following view gives a point?

a) Side view

b) Top view

c) Front view

d) Isometric view

View Answer

Explanation: Given the line AB is present in both the vertical and horizontal planes which are perpendicular so the line will be at xy reference line formed between them which is perpendicular to profile plane so the side view gives the point.

8. A line of length 55 mm lies on profile plane whose ends are at a distance of 15 mm and 20 mm to horizontal plane. What is the length in top view?

a) 54.77 mm

b) 5 mm

c) 0 mm

d) 35 mm

View Answer

Explanation: Given the line is of length 55 mm present on profile plane and ends are at 15 and 20 mm away from horizontal plane. As we imagine the projection planes we can get the top view and distance relation as given here √(55

^{2}-(20-15)

^{2})=54.77 mm.

9. A line of length 35 mm lies on vertical plane whose ends are at a distance of 15 mm and 10 mm to profile plane. What is the length in top view?

a) 0 mm

b) 35 mm

c) 5 mm

d) 34.64 mm

View Answer

Explanation: Given the line is of length 35 mm present on vertical plane and ends are at 15 and 10 mm away from a profile plane. As we imagine the projection planes we can get the top view and distance relation as given here. 15-10 =5 mm.

10. A line of length 12 cm lies on profile plane whose ends are at a distance of 4 cm and 5 cm to vertical plane. What is the length in top view?

a) 5 cm

b) 12 cm

c) 1 cm

d) 11.9 cm

View Answer

Explanation: Given the line is of length 12 cm present on profile plane and ends are at 4 cm and 5 cm away from vertical plane. As we imagine the projection planes we can get the top view and distance relation as given here. 5-4 =1 cm.

11. A line of length 10 inches lies on profile plane whose ends are at a distance of 5 inches and 3 inches to vertical plane. What is the length in front view?

a) 9.79

b) 2

c) 10

d) 0

View Answer

Explanation: Given the line is of length 10 inches present on profile plane and ends are at 5 and 3 inches away from vertical plane. As we imagine the projection planes we can get the front view and distance relation as given here. √(10

^{2}-2

^{2}) = 9.79 inches.

12. A line of length 20 cm lies on profile plane whose ends are at a distance of 5 cm and 7 cm to horizontal plane. What is the length in top view?

a) 7

b) 14.8

c) 15

d) 2

View Answer

Explanation: Given the line is of length 20 cm present on profile plane and ends are at 5 and 7 cm away from horizontal plane at right angles. As we imagine the projection planes we can get the top view and distance relation as given here. √(20

^{2}-(7-5)

^{2})= 14.8 cm.

13. A line of length 15 dm lies on vertical plane whose ends are at a distance of 5 dm and 7 dm to horizontal plane. What is the length in side view?

a) 7

b) 14.8

c) 15

d) 2

View Answer

Explanation: Given the line is of length 15 dm present on vertical plane and ends are at 5 and 7 dm away from horizontal plane at right angles. As we imagine the projection planes we can get the side view and distance relation as given here. 7-5 =2 dm.

14. A line of length 15 cm is on vertical plane makes an angle of 50 degrees with horizontal plane. What is the length of line in side view?

a) 0 cm

b) 11.49 cm

c) 9.6 cm

d) 15 cm

View Answer

Explanation: Given the line of 15 cm length is present on the vertical plane and making an angle of 50 degrees with horizontal plane so side view’s length will be 15 x sin (50) = 11.49 cm and front view will be 15 x sin (90-50).

15. A line of length 5 m is on horizontal plane makes an angle of 75 degrees with profile plane. What is the length of line in side view?

a) 1.29 m

b) 4.82 m

c) 2.41 m

d) 5 m

View Answer

Explanation: Given the line of 5 m length is present on the horizontal plane and making an angle of 50 degrees with profile plane so side view’s length will be 5 m x cos (75)=1.29 m and in front view, it will be 5 x sin (75).

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