A. plane and smooth
B. plane and rough
C. vertical and smooth
D. vertical and rough
Related Mcqs:
- 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° - 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 - The coefficient of active earth pressure for a loose sand having an angle of internal friction of 30° is___________________?
A. 1/3
B. 3
C. 1
D. 1/2 - 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 - In a triaxial compression test when drainage is allowed during the first stage (i. e. application of cell pressure) only and not during the second stage (i.e. application of deviator stress at constant cell pressure), the test is known as__________________?
A. consolidated drained test
B. consolidated undrained test
C. unconsolidated drained test
D. unconsolidated undrained test - 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 - The clay mineral with the largest swelling and shrinkage characteristics is_______________?
A. kaolinite
B. illite
C. montmorillonite
D. none of the above - If the permeability of a soil is 0.8 mm/sec, the type of soil is_______________?
A. gravel
B. sand
C. silt
D. clay - Time factor for a clay layer is_______________?
A. a dimensional parameter
B. directly proportional to permeability of soil
C. inversely proportional to drainage path
D. independent of thickness of clay layer - Coefficient of compressibility is_______________?
A. constant for any type of soil
B. different for different types of soils and also different for a soil under different states of consolidation
C. different for different types of soils but same for a soil under different states of consolidation
D. independent of type of soil but depends on the stress history of soil
