Question

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

I have been asked this question during an online interview.

I'm obligated to ask this question of Projection of Line Contained by Plane topic in chapter Projection of Lines of Engineering Drawing

Answer 1

Correct option is (a) 1.29 m

The 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).