Question

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

(a) 0.5%

(b) 1.5%

(c) 2.5%

(d) 3.5%

The question was asked in my homework.

This intriguing question comes from Molding Sand Mixtures for Casting topic in division Molding and Core Sands of Casting-Forming-Welding I

Answer 1

Correct option is (a) 0.5%

Explanation: In dry sand mouldings of steel castings, the dextrine percentage composition is calculated to be 0.5%. In green sands, the dextrin content is also 0.5%, which is in green sand and in dry sand, the percentage of dextrine is same.