Soil Mechanics and Foundation
Coefficient of compressibility is

independent of type of soil but depends on the stress history of soil
different for different types of soils and also different for a soil under different states of consolidation
constant for any type of soil
different for different types of soils but same for a soil under different states of consolidation

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Soil Mechanics and Foundation
Coefficient of earth pressure at rest is

less than both the active and passive earth pressures
greater than both the active earth pressure and passive earth pressure
greater than active earth pressure but less than passive earth pressure
less than active earth pressure but greater than passive earth pressure

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