Question

A line AB of length 15 cm is placed in 4th quadrant and parallel to profile plane and the end A and B are 8, 6 cm away from the horizontal plane respectively. The length of the line in front view is ______ cm.

(a) 14.8

(b) 9

(c) 7

(d) 2

The question was posed to me in my homework.

Question is taken from Projection of Straight Lines Parallel to Plane topic in section Projection of Lines of Engineering Drawing

Answer 1

Correct answer is (d) 2

The best I can explain: The difference in distances from A and B to horizontal plane is 2 (8-6) cm. And this front view of line in orthographic projection is perpendicular to the reference line as the line in projection planes is parallel to profile plane.