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Civil Engineering :: Soil Mechanics and Foundation Engineering

  1. Pick up the correct statement from the following :

  2. A.

    To an agriculturist, soil is the substance existing on the earth's surface, which grows and develops plants

    B.

    To a geologist, soil is the material in a relatively thin surface zone within which roots occur, and rest of the crust is termed as rock irrespective of hardness

    C.

    To an engineer, soil is the unaggregated and uncemented deposits of minerals and organic particles covering the earth's crust

    D.

    All the above.

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  3. The ratio of settlement at any time 't' to the final settlement, is known as

  4. A.

    co-efficient of consolidation

    B.

    degree of consolidation

    C.

    consolidation index

    D.

    consolidation of undisturbed soil.

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  5.   The Westergaard analysis is used for
  6. A.

    sandy soils

    B.

    cohesive soils

    C.

    stratified soils

    D.

    clayey soils.

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  7.  

    If L and B are the length and breadth of a footing, e the eccentricity along the length and P and Q are the axial force and bearing capacity of the soil, then, to avoid tension,

  8. A.

    BL = \( \frac { P } { Q} \) [ 1 + \( \frac { 6e } { L } \)]

    B.

    BL = \( \frac { Q } { P} \) [ 1 +\( \frac { 6e } { L } \)]

    C.

    BL = \( \frac { P } { Q} \) [ 1- \( \frac { 6e } { L } \)]

    D.

    BL = \( \frac { P } { Q} \) [ 1 - \( \frac { 3e } { L } \)]

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  9. 260 g of wet soil was taken in a pycnometer jar of weight 400 g in order to find the moisture content in the soil, with specific gravity of soil particles 2.75. The weight of soil and remaining water filled in pycnometer without air bubbles was 1415 g and the weight of pycnometer filled with water alone was 1275 g. The moisture content in the soil is

  10. A.

    24.2%

    B.
    18.2%
    C.

    53.8%

    D.

    none of these.

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  11. The earth pressure of a soil at rest, is proportional to (where φ is the angle of internal friction of the soil)

  12. A.

    tan (45° - φ)

    B.

    tan (45° + φ)

    C.

    tan2 (45° - φ)

    D.

    tan2 (45° + φ)

    E.

    none of these

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  13. A fundamental equation of void ratio(e), specific gravity (G), water content (ω) and degree of saturation (Sr) is

  14. A.

    e = \(\frac { wG } { Sr }\)

    B.

    w = \(\frac { eG } { Sr } \)

    C.

    G = \(\frac {ew} { S } \)

    D.

    Sr = \(\frac { ew } { G } \)

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  15. The critical exist gradient of seepage water in soils, is

  16. A.

    directly proportional to the voids ratio

    B.
    inversely proportional to the specific gravity
    C.

    directly proportional to the specific gravity

    D.

    inversely proportional to the voids ratio

    E.
    none of these.

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  17. Water content of a soil sample is the difference of the weight of the given sample at the given temperature and the weight determined after drying it for 24 hours at temperature ranging from

  18. A.

    80° to 90°C

    B.

    90° to 95°C

    C.

    95° to 100°C

    D.

    103° to 105°C

    E.
    105° to 110°C

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  19. The ratio of the volume of voids to the total volume of the given soil mass, is known

  20. A.

    porosity

    B.

    specific gravity

    C.

    void ratio

    D.

    water content.

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