Question

A pentagonal pyramid is placed on H.P on one of its base’s edge and the triangular surface containing the edge on which it is resting is making 45 degrees with H.P. Draw orthographic views and what are the top views of 1^st, 2^nd, 3^rd stages?

(a) Triangle, triangle, irregular pentagon

(b) Pentagon, irregular polygon of 4 sides, irregular polygon of 4 sides

(c) Triangle, triangle, irregular polygon of 4 sides

(d) Pentagon, irregular pentagon, irregular pentagon

I have been asked this question during an interview.

My enquiry is from Projection of Solids with Axes Inclined to both Horizontal and Vertical Plane in portion Projection of Solids of Engineering Drawing

Answer 1

Right choice is (b) Pentagon, irregular polygon of 4 sides, irregular polygon of 4 sides

Easy explanation: In the 1^st stage the solid’s axis is perpendicular to H.P and one base’s edge is perpendicular to V.P. so the top view will be pentagon and then made to rest on only one edge so top view will be irregular polygon of 4 sides and then adjusted to a given angle so top view will be same.