Soil Mechanics and Foundation
For better strength and stability, the fine grained soils and coarse grained soils are compacted respectively as

dry of OMC and dry of OMC where OMC is optimum moisture content
dry of OMC and wet of OMC
wet of OMC and wet of OMC
wet of OMC and dry of OMC

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

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Soil Mechanics and Foundation
Rise of water table above the ground surface causes

Equal increase in pore water pressure and total stress
Decrease in pore water pressure but increase in total stress
Equal decrease in pore water pressure and total stress
Increase in pore water pressure but decrease in total stress

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