Soil Mechanics and Foundation
The shear strength of a soil

Decreases with increase in normal stress
Is inversely proportional to the angle of internal friction of the soil
Decreases with decrease in normal stress
Is directly proportional to the angle of internal friction of the soil

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Soil Mechanics and Foundation
Rise of water table above the ground surface causes

Increase in pore water pressure but decrease in total stress
Equal decrease in pore water pressure and total stress
Equal increase in pore water pressure and total stress
Decrease in pore water pressure but increase in total stress

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