Question

The ____________ is used for making additional patterns with minimal double shrinkages.

(a) Aluminium

(b) White Metal

(c) Steel

(d) Grey Cast Iron

I have been asked this question by my college director while I was bunking the class.

I'm obligated to ask this question of Pattern Materials topic in portion Pattern Materials & Moulding Sand Tests of Foundry and Forging

Answer 1

Right answer is (b) White Metal

For explanation: The white metal is light, can be easily worked and is corrosion resistant. Since white metal has very small shrinkage, the white metal pattern can be made use of for making additional patterns without worrying about the double shrinkage allowances.