Question

The straight lines which are drawn from various points on the contour of an object to meet a plane are called as _________

(a) connecting lines

(b) projectors

(c) perpendicular lines

(d) hidden lines.

This question was addressed to me in an interview for job.

Origin of the question is Basics of Orthographic Projections in portion Loci of Points & Orthographic Projections of Engineering Drawing

Answer 1

Right choice is (b) projectors

To explain: The object will generally kept at a distance from planes so to represent the shape in that view projectors are drawn perpendicular to plane in orthographic projection.  Projectors are simply called lines of sights when an observer looks towards an object from infinity.