Soil Mechanics and Foundation
A normally consolidated clay settled 10 mm when effective stress was increased from 100 kN/m2 to 200 kN/ m2. If the effective stress is further increased from 200 kN/ m2 to 400 kN/ m2, then the settlement of the same clay is

20 mm
10 mm
None of these
40 mm

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Soil Mechanics and Foundation
In a deposit of normally consolidated clay

effective stress, water content and undrained strength decrease with depth
effective stress and water content increase with depth but undrained strength decreases with depth
effective stress increases with depth but water content of soil and un-drained strength decrease with depth
effective stress and undrained strength increase with depth but water content decreases with depth

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

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