Soil Mechanics and Foundation
In a deposit of normally consolidated clay

effective stress and undrained strength increase with depth but water content decreases with depth
effective stress, water content and undrained strength decrease with depth
effective stress increases with depth but water content of soil and un-drained strength decrease with depth
effective stress and water content increase with depth but undrained strength decreases with depth

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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

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

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Soil Mechanics and Foundation
Quick sand is a

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

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