Soil Mechanics and Foundation
Compressibility of sandy soils is

None of these
much less than that of clayey soils
much greater than that of clayey soils
almost equal to that of clayey 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

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

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