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

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

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Soil Mechanics and Foundation
The total discharge from two wells situated near to each other is

equal to larger of the two discharges from individual wells
sum of the discharges from individual wells
less than the sum of the discharges from individual wells
greater than the sum of the discharges from individual wells

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Soil Mechanics and Foundation
Coefficient of earth pressure at rest is

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

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