Question

The core material should be highly refractory in nature to avoid any damages to it.

(a) True

(b) False

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

This intriguing question comes from Riser Design topic in section Pattern and Mould, Principles of Gating & Risering of Casting-Forming-Welding I

Answer 1

Right answer is (a) True

For explanation: In the casting of massive ring shaped bodies, the bore area is very small, so the bore experiences very high temperature that can damage or destroy the bore material, so in maximum cases, the designs are made to eliminate the use of cores or the highly refractory core materials are used to resist the high temperature.