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 always increases
The liquid limit of soil may decrease

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Soil Mechanics and Foundation
Coefficient of earth pressure at rest is

less than active earth pressure but greater than passive earth pressure
greater than both the active earth pressure and passive earth pressure
less than both the active and passive earth pressures
greater than active earth pressure but less than passive earth pressure

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