Question

__________ usually occurs at the parting line and results in excess of metal.

(a) Fins

(b) Fash

(c) Strain

(d) All of the mentioned

I have been asked this question during an interview.

This interesting question is from Casting Defects topic in section Concept of Gating and Risering of Foundry and Forging

Answer 1

Right answer is (d) All of the mentioned

The best explanation: The fins, fash and strain all occur due to the same reason. They occur at the parting line. Straining or movement of the mould makes a casting appreciably thicker than the pattern. Hence, at the parting line excess metal is accumulated which is to be grounded off.