If the shearing stress is zero on two planes, then the angle between the two planes is________________?

Related Mcqs:

1. 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°...

2. A cylindrical specimen of saturated soil failed under an axial vertical stress of 100kN/m2 when it was laterally unconfmed. The failure plane was inclined to the horizontal plane at an angle of 45°. The values of cohesion and angle of internal friction for the soil are respectively______________________?

   A. 0.5 N/mm2 and 30° B. 0.05 N/mm2 and 0° C. 0.2 N/mm2 and 0° D. 0.05 N/mm2 and 45°...

3. 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...

4. A normally consolidated clay settled 10 mm when effective stress was increased from 100 kN/m2 to 200 kN/ m2. If the effective stress is further increased from 200 kN/ m2 to 400 kN/ m2, then the settlement of the same clay is__________________?

   A. 10 mm B. 20 mm C. 40 mm D. none of the above...

5. 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...

6. When the degree of saturation is zero, the soil mass under consideration represents______________?

   A. one phase system B. two phase system with soil and air C. two phase system with soil and water D. three phase system...

7. If the plasticity index of a soil mass is zero, the soil is______________?

   A. sand B. silt C. clay D. clayey silt...

8. 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...

9. The angle that Coulomb’s failure envelope makes with the horizontal is called________________?

   A. cohesion B. angle of internal friction C. angle of repose D. none of the above...

10. Total number of stress components at a point within a soil mass loaded at its boundary is______________?

    A. 3 B. 6 C. 9 D. 16...