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

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

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

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Soil Mechanics and Foundation
For a loose sand sample and a dense sand sample consolidated to the same effective stress

ultimate strength is same but peak strength of dense sand is greater than that of loose sand
ultimate strength is different but peak strength is same
ultimate strength is same and also peak strength is same
ultimate strength is same but peak

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