Question

Which of the following statement is incorrect about Expansive soils?

(a) Expansive soils exhibit shrinkage and swelling properties

(b) They have high compressibility and liquid limits with more than 50

(c) Black cotton soil is the most common expansive soil in India

(d) The lesser the swelling pressure, the more troublesome is the soil

This question was addressed to me in a dream while sleeping

I'm obligated to ask this question of Lining of Canals in Expansive Soils topic in section Lining of Irrigation Canals and its Economics of Irrigation Engineering

Answer 1

Right choice is (d) The lesser the swelling pressure, the more troublesome is the soil

For explanation: The expansive soils are clayey soils having clay mineral montmorillonite and chief property of such a soil is its swelling pressure. The soil is more troublesome and problematic if it has high swelling pressure.