Soil Mechanics and Foundation
For a loose sand sample and a dense sand sample consolidated to the same effective stress

ultimate strength is same but peak strength of dense sand is greater than that of loose sand
ultimate strength is different but peak strength is same
ultimate strength is same but peak
ultimate strength is same and also peak strength is same

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Soil Mechanics and Foundation
Coefficient of compressibility is

constant for any type of soil
different for different types of soils but same for a soil under different states of consolidation
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

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

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

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