Question

Which of the following materials require a longer pouring time?

(a) Non-ferrous material

(b) Grey cast iron

(c) Ferrous alloys

(d) Brass

I have been asked this question in an online quiz.

This interesting question is from Gating Design topic in chapter Pattern and Mould, Principles of Gating & Risering of Casting-Forming-Welding I

Answer 1

Right choice is (a) Non-ferrous material

For explanation: For nonferrous material, a longer pouring time would be beneficial since they lose heat slowly and also tend to form dross if a metal is poured too quickly, this dross makes the quality of the material poor and further defects induced in the material.