Question

How much clay does loam sand contain?

(a) Up to 2%

(b) Up to 10%

(c) Up to 30%

(d) Up to 50%

I had been asked this question in an interview for internship.

This question is from Mold Making topic in section Testing of Materials, Foundry & Powder Metallurgy of Engineering Material & Metallurgy

Answer 1

Right answer is (d) Up to 50%

The explanation: Depending on the amount of clay content, molding sand can be classified into various types. Silica sand contains up to 2% clay, whereas weak sand contains 2-10% clay. Moderately strong sand has 10-20% clay, strong sand has up to 30% clay, and loam sand has up to 50% clay.