Question

A differential free swell test on a soil gives a value of differential free swell of 40%. What is the degree of swelling?

• A. Low
• B. Medium
• C. High
• D. Very high

Answer 1

The correct option is C High

Degree of swelling for different differential free swell (OFS) are tabulated below
$\begin{array}{cc}\text{Degree of swelling}& \text{DFS, per cent}\\ \text{Low}& \text{Less than 20}\\ \text{Moderate}& \text{20 to 35}\\ \text{High}& \text{35 to 50}\\ \text{Very high}& \text{Greater than 50}\end{array}$