Question

The top views of 1^st, 2^nd and final stages of a pentagonal pyramid, has one of its triangular faces in the V.P and edge of the base contained by that face makes an angle of 30 degrees with the H.P while drawing orthographic projections are _____________

(a) Pentagon, irregular pentagon, irregular pentagon

(b) Triangle, irregular pentagon, irregular pentagon

(c) Triangle, triangle, irregular pentagon

(d) Pentagon, triangle, irregular pentagon

I got this question in exam.

This interesting question is from Projection of Solids with Axes Inclined to both Horizontal and Vertical Plane in division Projection of Solids of Engineering Drawing

Answer 1

Correct choice is (c) Triangle, triangle, irregular pentagon

To elaborate: As the 1^st stage is to keep the solid in simple position for given conditions the solid’s base should be placed on V.P so top view gives triangle and then rotated so as to one of the face touch the V.P now the view will remain triangle and then adjust so that edge of base on V.P makes 30 degrees with H.P so it show irregular pentagon from top.