Soil Mechanics and Foundation
The total and effective stresses at a depth of 5 m below the top level of water in a swimming pool are respectively

zero and zero
0.5 kg/cm² and 0.5 kg/cm²
1.0 kg/cm² and 0.5 kg/cm²
0.5 kg/cm² and zero

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Soil Mechanics and Foundation
Coefficient of earth pressure at rest is

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

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