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Soil Mechanics and Foundation Sheet 22

  • 1) Question.

    The coefficient of earth pressure at rest is given by

    [μ= Poisson's ratio]

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  • 2) Question.

    The earth pressure at rest is calculated by using

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  • 3) Question.

    The lateral earth pressure exerted by the soil when the retaining wall moves into the soil, is known as

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  • 4) Question.

    The effect of cohesion on a soil is to

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  • 5) Question.

    The active earth pressure of a soil is defined as the lateral pressure exerted by soil

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  • 6) Question.

    The earth pressure at rest is defined as the lateral pressure exerted by soil

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  • 7) Question.

    A line showing the dry density as a function of water content for soil containing no air voids, is called

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  • 8) Question.

    The useful method of finding the shear strength of very plastic cohesive soils is by means of

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  • 9) Question.

    The frictional resistance offered by sand is

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  • 10) Question.

    The frictional resistance of clayey soil is....... sandy soil.

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  • 11) Question.

    A vane 20cm long and 10 cm in diameter was pressed into a soft marine clay at the bottom of a bore hole. Torque was applied gradually and failure occurred at 1000 kg cm. The cohesion of the clay in kg/cm2is:

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  • 12) Question.

    Consider the following statements related to triaxial test:

    1.   Failure occurs along pre-determined plane.

    2.   Intermediate and minor principal stresses are equal.

    3.   Volume changes can be measured.

    4.   Field conditions can be simulated.

    Of these statements

     

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  • 13) Question.

    A and B are Skempton's pore pressure parameters and ∆σ1 and ∆σ3 are increemental principal stresses. Skempton's pore pressure equation is given by

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  • 14) Question.

    Using Mohr's diagram, the relation between major principal stress σ1 and minor principal stress σ3, and shear parameters c and ϕ is given by

    σ1=σ3Nϕ+2cNϕ where Nb
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  • 15) Question.

    For a given soil sample,

    Cc  = coefficient of gradation

    Cu  = coefficient of uniformity

    D10= effective size

    D30= diameter through which 30 per cent of the total soil mass is passing.

    If Cc=1.0 and Cu=4.0

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  • 16) Question.

    Increasing the depth of foundation in saturated clays results in an increased ultimate bearing capacity for strip footings

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  • 17) Question.

    The description of 'sandy silty clay' signifies that

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  • 18) Question.

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

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  • 19) Question.

    Contact pressure beneath a rigid footing resting on cohesive soil is

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  • 20) Question.

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

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