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

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Soil Mechanics and Foundation
Quick sand is a

flow condition occurring in cohesionless soils
flow condition occurring in both cohesive and cohesionless soils
type of sand
flow condition occurring in cohesive soils

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