Soil Mechanics and Foundation
Which of the following methods is most accurate for the determination of the water content of soil ?

sand bath method
pycnometer method
calcium carbide method
oven drying method

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Soil Mechanics and Foundation
The major principal stress in an element of cohesion-less soil within the backfill of a retaining wall is

Vertical if the soil is in a passive state of plastic equilibrium
Inclined at 45° to the vertical plane
None of these
Vertical if the soil is in an active state of plastic equilibrium

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