Question

Quick solidification of the casting can cause defects like shrinkages, cracks or blow holes.

(a) True

(b) False

The question was asked in a national level competition.

My question comes from Steps Involved In Making a Mold in section Mold and Mold Making of Casting-Forming-Welding I

Answer 1

Correct choice is (a) True

The explanation is: The molten metal is poured into the mould cavity that begins to cool and solidify. During solidification, most of the defects which may occur are a result of the solidification process. If the molten metal solidifies too quickly, then the casting parts may exhibit defects like shrinkage, cracks or blow holes.