Question

What is the function of cores in the casting process?

(a) To support the pattern

(b) To provide differential cooling rates at specific portions

(c) To make holes and cavities

(d) For ease of flow of the molten material

The question was asked in an internship interview.

Question is from Difference between Pattern and Casting topic in chapter Pattern and Pattern Making of Casting-Forming-Welding I

Answer 1

The correct choice is (c) To make holes and cavities

The explanation is: Cores are the elements used to provide hollow cavities and holes in the pattern which are difficult or non profitable to be given after the casting is done by machining.