Question

_________ patterns are useful for large castings in the foundry.

(a) Steel

(b) Lead alloys

(c) Aluminium alloys

(d) Wood

This question was posed to me in an internship interview.

The origin of the question is Pattern Materials topic in portion Pattern Materials & Moulding Sand Tests of Foundry and Forging

Answer 1

The correct choice is (d) Wood

For explanation: The quantity of wood required for the large castings’ pattern is high. The manufacturing of large casting requires high dimensional accuracy as several parts of the casting cannot be machined. Hence wood is the only practical pattern material.