Question

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

(a) 0.5%

(b) 1.5%

(c) 2.5%

(d) 3.5%

This question was addressed to me in a job interview.

Asked question is from Molding Sand Mixtures for Casting in portion Molding and Core Sands of Casting-Forming-Welding I

Answer 1

The correct choice is (a) 0.5%

The best explanation: In green sand mouldings of steel castings, the dextrine percentage composition is calculated to be 0.5% and the bentonite percentage in the same green sand is higher than dextrin by around 3%.