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Heat and the head pressure of molten metal can cause variation in the dimensions of a casting.(a) True(b) FalseI had been asked this question in exam.This intriguing question comes from Dimensional Inspection in portion Inspection Testing in Foundries of Casting-Forming-Welding I

Answer»

The correct answer is (a) True

The best I can explain: Heat and the head PRESSURE of MOLTEN metal can make a variation in the dimensions of casting, the heating and cooling of molten metal which results into expansion and CONTRACTION of it RESPECTIVELY, this changes the volume of a mould cavity and further results into the undesired dimensions of the casting.



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