Question

It is very difficult to cast pure copper metal in mould cavity because of shrinkage problems.

(a) True

(b) False

The question was asked in my homework.

Origin of the question is Copper Alloys in chapter Foundry Introduction & Materials of Casting-Forming-Welding II

Answer 1

Correct choice is (a) True

Easiest explanation: It is very difficult to cast pure copper in mould cavity because very large shrinkages occur during the solidification of castings, and a large amount of gasses are trapped in the casting at high temperatures which results in the melted material gassing and the porosity in casting components.