Question

A pentagonal prism is resting on H.P on one of its corners and from top view the solid’s axis is making 30 degrees with the xy reference line. What are the front views of the 1^st, 2^nd, 3^rd stages of orthographic drawing?

(a) Rectangle, rectangle, heptagon

(b) Pentagon, heptagon, heptagon

(c) Rectangle, heptagon, rectangle

(d) Pentagon, rectangle, heptagon

This question was addressed to me during an internship interview.

My question is taken from Projection of Solids with Axes Inclined to both Horizontal and Vertical Plane in section Projection of Solids of Engineering Drawing

Answer 1

The correct choice is (a) Rectangle, rectangle, heptagon

To explain: As in the 1^st stage the pentagonal prism is to be placed in simple position the axis perpendicular to V.P so front view gives rectangle and then rotated so as to keep one of the corners only on H.P so the front view will remain same then from projections of top view the front is drawn so an irregular heptagon will form.