Soil Mechanics and Foundation
Due to a rise in temperature, the viscosity and the unit weight of the percolating fluid are reduced to 60% and 90% respectively.If other things remain constant, the coefficient of permeability

increases by 33.3%
increases by 50%
increases by 25%
decreases by 33.3%

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Soil Mechanics and Foundation
Within the consolidation process of a saturated clay

a gradual decrease in neutral pressure and a gradual increase in effective pressure takes place and sum of the two is constant
a gradual increase in neutral pressure and a gradual decrease in effective pressure takes place and sum of the two is constant
both neutral pressure and effective pressure increase
both neutral pressure and effective pressure decrease

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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 an active state of plastic equilibrium
Vertical if the soil is in a passive state of plastic equilibrium
Inclined at 45° to the vertical plane

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