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

Inclined at 45° to the vertical plane
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

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

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

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Soil Mechanics and Foundation
The shear strength of a soil

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

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