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Civil Engineering :: Soil Mechanics and Foundation

  1. 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

  2. A.

     consolidated drained test

    B.

     consolidated undrained test

    C.

     unconsolidated drained test

    D.

     unconsolidated undrained test

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  3. 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

  4. A.

     10 mm

    B.

     20 mm

    C.

     40 mm

    D.

     none of the above

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  5. The total discharge from two wells situated near to each other is

  6. A.

     sum of the discharges from individual wells

    B.

     less than the sum of the discharges from individual wells

    C.

     greater than the sum of the discharges from individual wells

    D.

     equal to larger of the two discharges from individual wells

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  7. Direct measurement of permeability of the specimen at any stage of loading can be made

  8. A.

     only in fixed ring type consolido-meter

    B.

     only in floating ring type consolido-meter

    C.

     both (A) and (B)

    D.

     none of the above

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  9. The rise of water table below the foundation influences the bearing capacity of soil mainly by reducing

  10. A.

     cohesion and effective angle of shearing resistance

    B.

     cohesion and effective unit weight of soil

    C.

     effective unit weight of soil and effective angle of shearing resistance

    D.

     effective angle of shearing resistance

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  11. 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

  12. A.

     7°

    B.

     10°

    C.

     12°

    D.

     17°

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  13. The total and effective stresses at a depth of 5 m below the top level of water in a swimming pool are respectively

  14. A.

     zero and zero

    B.

     0.5 kg/cm² and zero

    C.

     0.5 kg/cm² and 0.5 kg/cm²

    D.

     1.0 kg/cm² and 0.5 kg/cm²

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  15. Due to a rise in temperature, the viscosity and the unit weight of the percolating fluid are reduced to 60% and 90% respectively.
    If other things remain constant, the coefficient of permeability

  16. A.

     increases by 25%

    B.

     increases by 50%

    C.

     increases by 33.3%

    D.

     decreases by 33.3%

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  17. At liquid limit, all soils possess

  18. A.

     same shear strength of small magnitude

    B.

     same shear strength of large magnitude

    C.

     different shear strengths of small magnitude

    D.

     different shear strengths of large magnitude

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  19. Sensitivity of a soil can be defined as

  20. A.

     percentage of volume change of soil under saturated condition

    B.

     ratio of compressive strength of unconfined undisturbed soil to that of soil in a remoulded state

    C.

     ratio of volume of voids to volume of solids

    D.

     none of the above

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