Question

The measuring line or the line of heights is the trace or the line of intersection with the picture plane, of the ____________ plane containing the point or points whose heights are to be determined.

(a) ground plane

(b) picture plane

(c) vertical plane

(d) central plane

I have been asked this question during an interview.

The question is from Types of Perspective topic in section Oblique & Perspective Projection of Engineering Drawing

Answer 1

The correct option is (c) vertical plane

The explanation is: The measuring line or the line of heights is the trace or the line of intersection with the picture plane, of the vertical plane containing the point or points whose heights are to be determined.