Soil Mechanics and Foundation
If the water table rises upto ground surface, then the

effective stress is reduced due to decrease in total stress only but pore water pressure does not change
total stress is reduced due to increase in pore water pressure only but effective stress does not change
effective stress is reduced due to increase in pore water pressure only but total stress does not change
total stress is increased due to decrease in pore water pressure but effective stress does not change

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Soil Mechanics and Foundation
Effective stress on soil

Increases both voids ratio and permeability
Increases voids ratio and decreases permeability
Decreases voids ratio and increases permeability
Decreases both voids ratio and permeability

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Soil Mechanics and Foundation
The shear strength of a soil

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

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