Soil Mechanics and Foundation
At liquid limit, all soils possess

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

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Soil Mechanics and Foundation
A tri-axial shear test is preferred to direct shear test, because

It can be performed under all three drainage conditions with complete control
Stress distribution on the failure plane, is non uniform
None of these
Precise measurement of pore pressure and change in volume during test, is not possible

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Soil Mechanics and Foundation
Coefficient of earth pressure at rest is

less than active earth pressure but greater than passive earth pressure
greater than both the active earth pressure and passive earth pressure
greater than active earth pressure but less than passive earth pressure
less than both the active and passive earth pressures

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