Question

The D10 represents a size, such that _________ of the particles are finer than this size.

(a) 20%

(b) 60%

(c) 10%

(d) 100%

The question was asked during an internship interview.

This interesting question is from Particle Size Distribution Curve topic in section Index Properties Determination of Geotechnical Engineering I

Answer 1

Correct choice is (c) 10%

To explain I would say: The D10 represents a size, in mm such that 10% of the particle is finer than D10 size.