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

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

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Soil Mechanics and Foundation
The admixture of coarser particles like sand or silt to clay causes

decrease in liquid limit and increase in plasticity index
decrease in both liquid limit and plasticity index
decrease in liquid limit and no change in plasticity index
increase in both liquid limit and plasticity index

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