Question

The co-efficient of permeability of fine sand is ____________

(a) 1.0 and greater

(b) 1×10^-6 and smaller

(c) 1×10^-2 to 5×10^-3

(d) 5×10^-2 to 1×10^-3

I got this question in final exam.

My doubt stems from Darcy’s Law in section Permeability of Geotechnical Engineering I

Answer 1

Correct answer is (d) 5×10^-2 to 1×10^-3

To explain I would say: For fine sand, the coefficient of permeability is 0.05 to 0.001 cm /sec or

5×10^-2 to 1×10^-3.