Question

A tetrahedron is made to place on H.P that is with its axis perpendicular to it and one of the edges of base parallel to V.P and then the tetrahedron is made to rotate w.r.t to H.P up to an acute angle. The top view of previous and later one is _____________

(a) isosceles triangle, Isosceles triangle

(b) equilateral triangle, isosceles triangle

(c) equilateral triangle, square

(d) square, irregular polygon of 4 sides

I had been asked this question at a job interview.

My question is based upon Projection of Solids with Axis Inclined to Horizontal Plane and Parallel to Vertical Plane in division Projection of Solids of Engineering Drawing

Answer 1

Correct answer is (b) equilateral triangle, isosceles triangle

Explanation: As normal a tetrahedron gives equilateral triangle for a project to its base and isosceles triangle for other view when placed without inclination but here inclination is given but given view is top view so the shape will change to isosceles triangle.