Question

A rectangular plane surface of size 60 x 30 cm is positioned in the first quadrant and is inclined at an angle of 60 degrees with the H.P and 30 degrees with the V.P. The top views while drawing projections in 1, 2 and 3 stages are _______  _________ and __________ respectively.

(a) line, line, parallelogram

(b) line, parallelogram, line

(c) rectangle, square, square

(d) rectangle, square, parallelogram

This question was addressed to me in final exam.

My doubt stems from Projection of Oblique Plane in portion Projection of Planes of Engineering Drawing

Answer 1

The correct answer is (c) rectangle, square, square

Explanation: As initially the plane is assumed to be parallel to H.P the top view will be a rectangle and then the plane is tilted with respect to H.P to 60 degrees angle the top view will be rectangle compressed to square (60 x cos (60)= 30). Finally the plane is tilted with respect to V.P then square will just turn w.r.t V.P.