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For degree of saturation, it is recommended to take χ as _____________

(a) 0

(b) 1

(c) 2

(d) ∞

I got this question in a national level competition.

My question is from Stress Condition in Soil :Effective and Actual Pressure in section Soil Water Effective and Neutral Stresses of Geotechnical Engineering I

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Best answer
The correct option is (b) 1

Easiest explanation: For degree of saturation of S ≥90%, it is recommended to take χ as unity (i.e., 1).

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