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

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

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Soil Mechanics and Foundation
Effective stress on soil

Decreases voids ratio and increases permeability
Decreases both voids ratio and permeability
Increases both voids ratio and permeability
Increases voids ratio and decreases permeability

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Soil Mechanics and Foundation
Coefficient of earth pressure at rest is

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

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