Soil Mechanics and Foundation
Which of the following methods is best suited for determination of permeability of coarse-grained soils ?

None of these
falling head method
both the above
constant head method

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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
None of these
Stress distribution on the failure plane, is non uniform
Precise measurement of pore pressure and change in volume during test, is not possible

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