Question

If a line is perpendicular to one of the projection planes and lies on other two planes then the line will lies on reference line accordingly.

(a) True

(b) False

The question was asked during a job interview.

Question is from Projection of Line Perpendicular to one of the Plane topic in division Projection of Lines of Engineering Drawing

Answer 1

Correct answer is (a) True

Easiest explanation: If a line is perpendicular to one of the projection planes and lies on other two planes then the line will lies on reference line accordingly. As any line lies on two planes it will definitely passes through the reference line and so which is perpendicular to other plane.