Question

The length of line placed in profile plane from front view is product of actual length and ____(angle  with horizontal plane).

(a) cosine

(b) sine

(c) tangent

(d) secant

This question was posed to me in a job interview.

Question is taken from Line contained by a Plane Perpendicular to Both the Reference Planes topic in chapter Projection of Lines of Engineering Drawing

Answer 1

Right answer is (b) sine

Easy explanation: As the angle is between the line and horizontal plane the height is the length of the line in front view. If angle with vertical is given the length will be product of actual length and cosine of angle between the line and vertical plane.