Soil Mechanics and Foundation
For proper field control, which of the following methods is best suited for quick determination of water content of a soil mass ?

oven drying method
sand bath method
calcium carbide method
alcohol method

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Soil Mechanics and Foundation
The shear strength of a soil

Decreases with decrease in normal stress
Decreases with increase in normal stress
Is directly proportional to the angle of internal friction of the soil
Is inversely proportional to the angle of internal friction of the soil

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Soil Mechanics and Foundation
With the increase in the amount of compaction energy

both optimum water content and maximum dry density increase
optimum water content decreases but maximum dry density increases
optimum water content increases but maximum dry density decreases
both optimum water content and maximum dry density decrease[ES 93]

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