Question

The shape of particle size curve, which is represented by the coefficient of curvature (Cc) is given by __________

(a) Cc = (D30)2/D10×D40

(b) Cc = (D40)2/D10×D30

(c) Cc = (D30)2/D10×D60

(d) Cc = D60/D10

I have been asked this question during an interview.

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

Answer 1

Right answer is (c) Cc = (D30)2/D10×D60

For explanation: The coefficient of curvature (Cc) is given by the equation

Cc = (D30)2/D10×D60.