Soil Mechanics and Foundation
The hydrometer method of sedimentation analysis differs from the pipette analysis mainly in

the method of preparation of soil suspension
the principle of test
All of these
the method of taking observations

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Soil Mechanics and Foundation
In a deposit of normally consolidated clay

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

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