Question

Positive temperature gradient which gradually increases towards the feed head, avoid shrinkage defects.

(a) True

(b) False

I got this question by my college professor while I was bunking the class.

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

Answer 1

Right option is (a) True

Easiest explanation: Redesign is the most effective way to avoid shrinkage defects. The designer tries to place and proportion members and their intersections in such a way as to establish a positive temperature gradient which is lowest at points farthest away from the feed head and which gradually increases towards the feed head.