Question

What is the percentage composition of water in natural sands?

(a) 2-4%

(b) 5-8%

(c) 6-9%

(d) 10-13%

The question was posed to me in final exam.

This is a very interesting question from Molding Sands in portion Molding and Core Sands of Casting-Forming-Welding I

Answer 1

The correct answer is (b) 5-8%

The best I can explain: Water is an important agent used in sands, but its composition should be inside the desired range. The percentage composition of water in natural sands is around 5-8% for mixing before making a mould.