Question

Identify the correct elevation when you look into the object from the marked arrow side of the plan of the object.

• A. D
• B. A
• C. B
• D. C

Hint:

Count the vertical edges the plan shows when seen from the arrow side: they give the divisions of the base, and the two circles give a two-tier circular stack.

Answer 1

The Correct Option is A

From the plan, the outer plate is an octagon with V-notches at the top and bottom, so seen from the marked (lower) side its vertices fall at four unequal places and divide the base slab into four parts in the ratio about 2 : 1 : 1 : 2. Only elevation D shows a base divided into four parts of this kind (A, B and C show three equal parts).
On the plate stand two concentric circles: the outer circle about 0.64 of the plate width and the inner circle about 0.32 of the plate width. These are two cylinders of different diameter, one above the other, so the elevation is a stepped shape with two tiers of widths in the ratio 2 : 1. This matches D, while A (a notched roof), B (a dome) and C (a frustum) do not fit the plan.
Answer: (1) D