Soil Mechanics and Foundation
Effective stress on soil

Increases voids ratio and decreases permeability
Decreases voids ratio and increases permeability
Increases both voids ratio and permeability
Decreases both voids ratio and permeability

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

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Soil Mechanics and Foundation
The average coefficient of permeability of natural deposits

Parallel to stratification may or may not be greater than that perpendicular to stratification
Parallel to stratification is always less than that perpendicular to stratification
Is always same in both directions
Parallel to stratification is always greater than that perpendicular to stratification

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Soil Mechanics and Foundation
Degree of consolidation is

directly proportional to square of drainage path and inversely proportional to time
directly proportional to time and inversely proportional to drainage path
directly proportional to drainage path and inversely proportional to time
directly proportional to time and inversely proportional to square of drainage path

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