Question

A square is held 30 degrees with horizontal plane and turned 30 degrees with respect to vertical plane keeping earlier condition constant. The top view will be ________________

(a) line

(b) square

(c) rectangle

(d) parallelogram

I got this question in a national level competition.

This is a very interesting question from Basics of Planes in section Projection of Planes of Engineering Drawing

Answer 1

Correct answer is (c) rectangle

Explanation: If a square is parallel to one of the reference plane the projection parallel to plane gives the true shape and size as here plane is inclined so square transformed to rectangle and further it turned parallel to observer so no change in shape and size.