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When do the soil suction is reduced to zero value?

(a) Water content is reduced

(b) Soil is oven dry

(c) Dry soil is submerged

(d) All of the mentioned

This question was posed to me in a job interview.

The doubt is from Capillary Tension, Capillary Potential and Soil Suction topic in portion Soil Water Effective and Neutral Stresses of Geotechnical Engineering I

1 Answer

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Right answer is (c) Dry soil is submerged

Explanation: When a dry soil is submerged under water, meniscus is destroyed resulting in a reduction of soil suction to zero value.

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