Question

A regular cone having its axis parallel to V.P and perpendicular to H.P at first but then the cone’s axis keeping parallel to V.P and rotated such that its new axis is perpendicular to previous axis. The front view of the previous and later one is ______________

(a) circle, triangle

(b) circle, triangle with circular base

(c) triangle, triangle

(d) circle, circle

I got this question in examination.

My enquiry is from Projection of Solids with Axis Inclined to Horizontal Plane and Parallel to Vertical Plane in division Projection of Solids of Engineering Drawing

Answer 1

Right choice is (c) triangle, triangle

For explanation I would say: Given a regular cone which means the projection to its base gives circle shape and other orthographic views give triangle. But here given is inclination it may give irregular shape in its top view if the angle give is acute but given angle is 90 degrees so it gives perfect shapes.