Question

Specific surface of the soil particle increase very rapidly, as the grain size ____________

(a) Increases

(b) Decreases

(c) Bulges

(d) None of the mentioned

This question was addressed to me during an internship interview.

My question is taken from Soils Classification topic in section Classification of Soils of Geotechnical Engineering I

Answer 1

The correct answer is (b) Decreases

The best explanation: The subdivision of a mass yields greater surface area than the same mass itself. The specific surface of a mass increases as the grain size decreases.