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Capillary tension is developed in saturated soil, when ___________

(a) Soil is dry

(b) Water content is reduced

(c) Water content is increased

(d) Soil particle is large

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This interesting question is from Capillary Tension, Capillary Potential and Soil Suction in portion Soil Water Effective and Neutral Stresses of Geotechnical Engineering I

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Correct choice is (b) Water content is reduced

Easiest explanation: On decreasing of water content, the menisci recede, resulting in a reduction of curvature and corresponding increase in capillary tension.

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