Question

The front views of 1st, 2nd 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 unit test.

This intriguing question comes 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 answer is (a) Pentagon, irregular pentagon, irregular pentagon

The best explanation: 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 front view gives pentagon and then rotated so as to one of the face touch the V.P now the view will become irregular pentagon and then adjust so that edge of base on V.P makes 30 degrees with H.P so it show irregular pentagon from front view.