Question: 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___________________?

• 1. 0.5
• 2. -0.5
• 3. 2.0
• 4. – 2.0

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

• 1. horizontal plane only
• 2. vertical plane only
• 3. both horizontal and vertical planes
• 4. all planes except horizontal and vertical planes

Question: The angle that Coulomb’s failure envelope makes with the horizontal is called________________?

• 1. cohesion
• 2. angle of internal friction
• 3. angle of repose
• 4. none of the above

Question: Rankine’s theory of earth pressure assumes that the back of the wall is_______________?

• 1. plane and smooth
• 2. plane and rough
• 3. vertical and smooth
• 4. vertical and rough

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

• 1. vertical if the soil is in an active state of plastic equilibrium
• 2. vertical if the soil is in a passive state of plastic equilibrium
• 3. inclined at 45° to the vertical plane
• 4. none of the above

Question: 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 dist

• 1. 7°
• 2. 10°
• 3. 12°
• 4. 17°

Question: Bishop’s method of stability analysis_______________?

• 1. is more conservative
• 2. neglects the effect of forces acting on the sides of the slices
• 3. assumes the slip surface as an arc of a circle
• 4. all of the above

Question: The effect of cohesion on a soil is to______________?

• 1. reduce both the active earth pressure intensity and passive earth pressure intensity
• 2. increase both the active earth pressure intensity and passive earth pressure intensity
• 3. reduce the active earth pressure in-tensity but to increase the passive earth pressure intensity
• 4. increase the active earth pressure in-tensity but to reduce the passive earth pressure intensity

Question: Coefficient of earth pressure at rest is__________________?

• 1. less than active earth pressure but greater than passive earth pressure
• 2. greater than active earth pressure but less than passive earth pressure
• 3. greater than both the active earth pressure and passive earth pressure
• 4. less than both the active and passive earth pressures

Question: Allowable bearing pressure for a foundation depends upon_______________?

• 1. allowable settlement only
• 2. ultimate bearing capacity of soil only
• 3. both allowable settlement and ultimate bearing capacity
• 4. none of above