Question

_________________ sands are best molding sands.

(a) Refractory Sand

(b) Loam Sand

(c) Natural Sand

(d) Synthetic Sand

The question was asked by my school principal while I was bunking the class.

The above asked question is from Types of Binders in the Moulding Sand, Types of Base Sand in division Casting Processes of Foundry and Forging

Answer 1

Correct option is (a) Refractory Sand

Best explanation: Refractory Sands maintain their shape and other characteristics even at very high temperatures while they are in contact with the molten metals. Hence they are termed as the best molding sands.