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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Soil Mechanics and Foundation
In a triaxial compression test when drainage is allowed during the first stage (i. e. application of cell pressure) only and not during the second stage (i.e. application of deviator stress at constant cell pressure), the test is known as

unconsolidated drained test
unconsolidated undrained test
consolidated drained test
consolidated undrained test

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Soil Mechanics and Foundation
The shear strength of a soil

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

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