Soil Mechanics and Foundation
The admixture of coarser particles like sand or silt to clay causes

decrease in liquid limit and increase in plasticity index
increase in both liquid limit and plasticity index
decrease in both liquid limit and plasticity index
decrease in liquid limit and no change in plasticity index

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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
It can be performed under all three drainage conditions with complete control
None of these
Stress distribution on the failure plane, is non uniform

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Soil Mechanics and Foundation
Within the consolidation process of a saturated clay

a gradual decrease in neutral pressure and a gradual increase in effective pressure takes place and sum of the two is constant
both neutral pressure and effective pressure decrease
a gradual increase in neutral pressure and a gradual decrease in effective pressure takes place and sum of the two is constant
both neutral pressure and effective pressure increase

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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
less than the sum of the discharges from individual wells
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
A cylindrical specimen of saturated soil failed under an axial vertical stress of 100kN/m2 when it was laterally unconfmed. The failure plane was inclined to the horizontal plane at an angle of 45°. The values of cohesion and angle of internal friction for the soil are respectively

0.05 N/mm² and 45°
0.5 N/mm² and 30°
0.05 N/mm² and 0°
0.2 N/mm² and 0°

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Soil Mechanics and Foundation
In a deposit of normally consolidated clay

effective stress and water content increase with depth but undrained strength decreases with depth
effective stress and undrained strength increase with depth but water content decreases with depth
effective stress, water content and undrained strength decrease with depth
effective stress increases with depth but water content of soil and un-drained strength decrease with depth

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