Soil Mechanics and Foundation
Quick sand is a

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

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Soil Mechanics and Foundation
The major principal stress in an element of cohesion-less soil within the backfill of a retaining wall is

Vertical if the soil is in an active state of plastic equilibrium
None of these
Inclined at 45° to the vertical plane
Vertical if the soil is in a passive state of plastic equilibrium

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Soil Mechanics and Foundation
Sensitivity of a soil can be defined as

ratio of volume of voids to volume of solids
percentage of volume change of soil under saturated condition
None of these
ratio of compressive strength of unconfined undisturbed soil to that of soil in a remoulded state

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