Question

In cement bonded sand mold, sand mold material consists of what percentage of silica sand?

(a) 75.5%

(b) 80.5%

(c) 85.5%

(d) 90.5%

I have been asked this question at a job interview.

This intriguing question originated from Types of Molds topic in portion Mold and Mold Making of Casting-Forming-Welding I

Answer 1

Correct answer is (c) 85.5%

To explain I would say: In a cement bonded sand mold, it is observed that the sand mold material consists of a very high content of silica sand. Cement bonded sand mold contains 85.5% composition of silica sand.