Soil Mechanics and Foundation
A plane inclined at an angle ‘φ’ to the horizontal at which the soil is expected to stay in the absence of any lateral support, is known as

Repose line
Natural slope line
The φ line
All listed here

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Soil Mechanics and Foundation
Effective stress on soil

Decreases both voids ratio and permeability
Increases voids ratio and decreases permeability
Increases both voids ratio and permeability
Decreases voids ratio and increases permeability

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