Soil Mechanics and Foundation
Compressibility of sandy soils is

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

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

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Soil Mechanics and Foundation
If the material of the base of the Casagrande liquid limit device on which the cup containing soil paste drops is softer than the standard hard rubber, then

The liquid limit of soil always increases
The liquid limit of soil may decrease
The liquid limit of soil may increase
The liquid limit of soil always decreases

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