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

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Soil Mechanics and Foundation
In a triaxial compression test when drainage is allowed during the first stage (i. e. application of cell pressure) only and not during the second stage (i.e. application of deviator stress at constant cell pressure), the test is known as

consolidated undrained test
consolidated drained test
unconsolidated undrained test
unconsolidated drained test

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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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