Question

Water cooling is always preferred than the air cooling for the extraction of heat from the castings through the mould.

(a) True

(b) False

The question was posed to me by my college director while I was bunking the class.

This key question is from Gravity Die Casting topic in portion Special Casting Techniques of Casting-Forming-Welding I

Answer 1

Right choice is (b) False

Explanation: It is true that water cooling results into higher extraction of heat from the castings, but its application arises some problems. The likely problems with the cooling water circulation are the formation of scales inside the cooling channels and their subsequent blocking after some use. That’s why sometimes water cooling is less preferred than the air cooling.