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Civil Engineering :: Concrete Technology

  1. For the construction of cement concrete floor, the maximum permissible size of aggregate, is

  2. A.

    4 mm

    B.
    6 mm
    C.

    8 mm

    D.

    10 mm

    E.

    12 mm

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  3. The process of proper and accurate measurement of concrete ingredients for uniformity of proportion, is known

  4. A.

    grading

    B.

    curing

    C.

    mixing

    D.

    batching

    E.

    none of these.

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  5. Pick up the correct statement from the following:

  6. A.

    Insufficient quantity of water makes the concrete mix harsh

    B.

    Insufficient quantity of water makes the concrete unworkable

    C.

    Excess quantity of water makes the concrete segregated

    D.

    Excess quantity of water causes bleeding in concrete

    E.

    All the above.

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  7. The preliminary test is repeated if the difference of compressive strength of three test specimens, exceeds

  8. A.

    5 kg/cm2

    B.

    8 kg/cm2

    C.

    10 kg/cm2

    D.

    12 kg/cm2

    E.

    15 kg/cm2

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  9. Pick up the correct proportions of chemical ingredients of cement

  10. A.

    Lime : Silica : Alumina : Iron oxide : 63 : 22 : 6 : 3

    B.

    Silica : Lime : Alumina : Iron oxide : 63 : 22 : 6 : 3

    C.

    Alumina : Silica : Lime : Iron oxide : 63 : 22 : 6 : 3

    D.

    Iron oxide : Alumina : Silica : Lime : 63 : 22 : 6 : 3

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  11. Transport of concrete by pumps, is done for a distance of

  12. A.

    100 m

    B.

    200 m

    C.

    300 m

    D.

    400 m

    E.
    none of these.

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  13. If X, Y and Z are the fineness modulli of coarse, fine and combined aggregates, the percentage (P) of fine aggregates to combined aggregates, is


  14. Slump test is done for

  15. A.

    clay

    B.
    sand
    C.

    lime

    D.
    concrete.

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  16. The high strength of rapid hardening cement at early stage, is due to its

  17. A.

    finer grinding

    B.

    burning at high temperature

    C.

    increased lime cement

    D.

    higher content of tricalcium.

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  18. Pick up the correct statement from the following:

  19. A.

    The weight of ingredients of concrete mix, is taken in kilograms

    B.

    Water and aggregates are measured in litres

    C.

    The finished concrete is measured in cubic metres

    D.

    20 bags of cement make one tonne

    E.

    All the above.

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