Question

In the green sand moulding of steel casting, what is the moisture percentage composition?

(a) 1% – 2%

(b) 2% – 3%

(c) 3% -4%

(d) 4% – 5%

I got this question in an interview for job.

My query is from Molding Sand Mixtures for Casting in division Molding and Core Sands of Casting-Forming-Welding I

Answer 1

Correct answer is (c) 3% -4%

To elaborate: In green sand mouldings of steel castings, the moisture percentage composition is calculated to be 3%- 4% and the amount of bentonite present in the same green sand is around 3.5%.