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
Is always same in both directions
Parallel to stratification is always less than that perpendicular to stratification
Parallel to stratification is always greater than that perpendicular to stratification

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

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

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