Soil Mechanics and Foundation
Quick sand is a

flow condition occurring in cohesionless soils
flow condition occurring in cohesive soils
flow condition occurring in both cohesive and cohesionless soils
type of sand

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Soil Mechanics and Foundation
Effective stress on soil

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

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

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