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

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

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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

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

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Soil Mechanics and Foundation
The average coefficient of permeability of natural deposits

Parallel to stratification may or may not be greater than that perpendicular to stratification
Parallel to stratification is always less than that perpendicular to stratification
Is always same in both directions
Parallel to stratification is always greater than that perpendicular to stratification

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