Question

It is very necessary to use high refractoriness of mould material for the making of insulated mould.

(a) True

(b) False

This question was posed to me in an internship interview.

I need to ask this question from Solidification of a Large Casting in an Insulating Mould in chapter Cooling and Solidification of Casting-Forming-Welding I

Answer 1

Correct choice is (a) True

To explain: The mould material used should be of high refractoriness because the mould used for the solidification of casting is to be insulated. So the mould should be capable of maintaining all the thermal resistance to withstand very high temperature for the long duration of time until the casting is made.