Soil Mechanics and Foundation
Quick sand is a

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

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Soil Mechanics and Foundation
The shear strength of a soil

Decreases with decrease in normal stress
Decreases with increase in normal stress
Is inversely proportional to the angle of internal friction of the soil
Is directly proportional to the angle of internal friction of the soil

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Soil Mechanics and Foundation
The average coefficient of permeability of natural deposits

Is always same in both directions
Parallel to stratification may or may not be greater than that perpendicular to stratification
Parallel to stratification is always greater than that perpendicular to stratification
Parallel to stratification is always less than that perpendicular to stratification

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