Soil Mechanics and Foundation - Interview Questions | Exam2Win

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6. 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

Explanation:

7. According to IS specifications, the minimum depths of foundation in sand and clay should be respectively

A. 600 mm and 700 mm

B. 800 mm and 900 mm

C. 1 m and 800 mm

D. 1 m and 1.2 m

Explanation:

8. 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

Explanation:

9. Rise of water table in cohesionless soils upto ground surface reduces the net ultimate bearing capacity approximately by

A. 25%

B. 50%

C. 75%

D. 90%

Explanation:

10. Bishop's method of stability analysis

A. is more conservative

B. neglects the effect of forces acting on the sides of the slices

C. assumes the slip surface as an arc of a circle

D. all of the above

Explanation: