Question

Non-uniform cross-sectional areas of the high temperature casting lead to having hot spots in the casting.

(a) True

(b) False

This question was posed to me by my college professor while I was bunking the class.

My question is based upon Product Design for Sand Castings topic in division Pouring – Gating Design, Melting Furnaces, Melting and Casting Quality of Casting-Forming-Welding I

Answer 1

Correct choice is (a) True

For explanation I would say: In a casting of uniform width and thickness, no temperature variations would exist throughout the length of the casting. However, if the casting has non-uniform cross-sectional areas, the temperature would vary considerably. And a high temperature position is called as the hot spot, as shown in below figure.