Soil Mechanics and Foundation
At liquid limit, all soils possess

same shear strength of large magnitude
different shear strengths of small magnitude
different shear strengths of large magnitude
same shear strength of small magnitude

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

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

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