Soil Mechanics and Foundation
The maximum dry density upto which any soil can be compacted depends upon

moisture content only
amount of compaction energy only
both moisture content and amount of compaction energy
None of these

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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
Vertical if the soil is in an active state of plastic equilibrium
None of these

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