Soil Mechanics and Foundation
Terzaghi’s bearing capacity factors Nc, Nq and Nr are functions of

angle of internal friction only
both cohesion and angle of internal friction
both cohesion and angle of internal friction
cohesion only

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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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Soil Mechanics and Foundation
If the material of the base of the Casagrande liquid limit device on which the cup containing soil paste drops is softer than the standard hard rubber, then

The liquid limit of soil always increases
The liquid limit of soil always decreases
The liquid limit of soil may decrease
The liquid limit of soil may increase

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