Question

During the solidification of casting in an insulating mould, the heat transfer takes place from the upside of the moulding system which might cause defects in the castings.

(a) True

(b) False

I had been asked this question in an internship interview.

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

Answer 1

Correct answer is (b) False

To explain: During the solidification of casting in an insulating mould, the entire casting’s thermal resistance is offered by the mould material. Hence, the analysis of freezing time is done by mainly considering the thermal resistance of the moulding material. This method usually takes more time for solidification as compared to the other methods.