# For perfectly dry soil, degree of saturation is: _______.

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For perfectly dry soil, degree of saturation is: _______.
1. Zero
2. 0 to 1
3. 1
4. Infinite

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Correct Answer - Option 1 : Zero

Explanation:

Degree of saturation:

${\bf{S}} = \frac{{{{\bf{V}}_{\bf{w}}}}}{{{{\bf{V}}_{\bf{v}}}}} = \frac{{{\bf{Volume}}{\rm{ }}\ {\bf{of}}{\rm{ }}\ {\bf{water}}}}{{{\bf{Volume\ }}{\rm{ }}{\bf{of}}{\rm{ }}\ {\bf{voids}}}}$

When soil is perfectly dry, The Volume of water = 0

Then, Degree of saturation = 0.

For fully saturated soil, Degree of saturation = 1

Because Volume of water = volume of voids

Hence, degree of saturation varies between 0 and 1.