Soil Mechanics and Foundation
When the degree of saturation is zero, the soil mass under consideration represents

two phase system with soil and air
three phase system
two phase system with soil and water
one phase system

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Soil Mechanics and Foundation
The effect of cohesion on a soil is to

increase both the active earth pressure intensity and passive earth pressure intensity
reduce both the active earth pressure intensity and passive earth pressure intensity
reduce the active earth pressure in-tensity but to increase the passive earth pressure intensity
increase the active earth pressure in-tensity but to reduce the passive earth pressure intensity [GATE 99]

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