Question

The strength of the dry sand mould depends on ________

(a) Sand Quality

(b) Sand grain

(c) Binders

(d) Additives

This question was posed to me in an online quiz.

The origin of the question is Types of Sand Moulds topic in section Pattern Materials & Moulding Sand Tests of Foundry and Forging

Answer 1

Correct answer is (c) Binders

To explain I would say: The dry sand mould is prepared using the heating method. Dry sand moulds are the green sand moulds which are completely dried by keeping in an oven in 150 to 350 C for 8 to 48 hours. Due to the great interference of heat, the strength is dependent on the binders in the molding sand.