Question

The additives in sodium silicate are ____________

(a) Sugar

(b) Dextrin

(c) Molasses

(d) Zircon

The question was asked in unit test.

I would like to ask this question from Carbon Dioxide Mould in division Moulding Machines & Special Moulding Processes of Foundry and Forging

Answer 1

The correct answer is (b) Dextrin

To explain: The sodium silicate my contain additives such as sugars to help the breakdown of the core in casting that is to improve the collapsibility of the core. Molasses is the by-product of the sugar industry hence it is not used.