Question

A line parallel to horizontal plane is held at 65 degrees with profile plane and front view gives 6 cm of length. What is the true length of line?

(a) 5.43 cm

(b) 14.19 cm

(c) 2.5 cm

(d) 6.62 cm

The question was asked during a job interview.

Asked question is from True Length of a Straight Line and its Inclinations with the Reference Planes topic in section Projection of Lines of Engineering Drawing

Answer 1

Right answer is (d) 6.62 cm

The best I can explain: True length of line parallel to horizontal plane and making angle with profile plane can be of two values either from front view or side view but from top view the length will be given length. As here it is given front view L= 6/sin (65).