Soil Mechanics and Foundation Engineering

Coefficient of earth pressure at rest is__________________?

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Coefficient of earth pressure at rest is__________________?

A. less than active earth pressure but greater than passive earth pressure
B. greater than active earth pressure but less than passive earth pressure
C. greater than both the active earth pressure and passive earth pressure
D. less than both the active and passive earth pressures

The effect of cohesion on a soil is to______________?

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The effect of cohesion on a soil is to______________?

A. reduce both the active earth pressure intensity and passive earth pressure intensity
B. increase both the active earth pressure intensity and passive earth pressure intensity
C. reduce the active earth pressure in-tensity but to increase the passive earth pressure intensity
D. increase the active earth pressure in-tensity but to reduce the passive earth pressure intensity

A retaining wall 6m high supports a backfill with a surcharge angle of 10°. The back of the wall is inclined to the vertical at a positive batter angle of 5°. If the angle of wall friction is 7°, then the resultant active earth pressure will act at a distance of 2 m above the base and inclined to the horizontal at an angle of_________________?

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A retaining wall 6m high supports a backfill with a surcharge angle of 10°. The back of the wall is inclined to the vertical at a positive batter angle of 5°. If the angle of wall friction is 7°, then the resultant active earth pressure will act at a distance of 2 m above the base and inclined to the horizontal at an angle of_________________?

A. 7°
B. 10°
C. 12°
D. 17°

The major principal stress in an element of cohesionless soil within the backfill of a retaining wall is________________?

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The major principal stress in an element of cohesionless soil within the backfill of a retaining wall is________________?

A. vertical if the soil is in an active state of plastic equilibrium
B. vertical if the soil is in a passive state of plastic equilibrium
C. inclined at 45° to the vertical plane
D. none of the above

In the triaxial compression test, the application of additional axial stress (i.e. deviator stress) on the soil specimen produces shear stress on__________________?

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In the triaxial compression test, the application of additional axial stress (i.e. deviator stress) on the soil specimen produces shear stress on__________________?

A. horizontal plane only
B. vertical plane only
C. both horizontal and vertical planes
D. all planes except horizontal and vertical planes

During the first stage of triaxial test when the cell pressure is increased from 0.10 N/mm2 to 0.26 N/mm2, the pore water pressure increases from 0.07 N/mm2 to 0.15 “N/mm2. Skempton’s pore pressure parameter B is___________________?

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During the first stage of triaxial test when the cell pressure is increased from 0.10 N/mm2 to 0.26 N/mm2, the pore water pressure increases from 0.07 N/mm2 to 0.15 “N/mm2. Skempton’s pore pressure parameter B is___________________?

A. 0.5
B. -0.5
C. 2.0
D. – 2.0