Soil Mechanics and Foundation
Which of the following methods is best suited for determination of permeability of coarse-grained soils ?

constant head method
None of these
falling head method
both the above

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Soil Mechanics and Foundation
With the increase in the amount of compaction energy

optimum water content increases but maximum dry density decreases
both optimum water content and maximum dry density increase
optimum water content decreases but maximum dry density increases
both optimum water content and maximum dry density decrease[ES 93]

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

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]
increase both the active earth pressure intensity and passive earth pressure intensity
reduce both the active earth pressure intensity and passive earth pressure intensity

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