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Civil Engineering :: Concrete Technology and Design of Concrete Structures

  1. The depth of footing for an isolated column is governed by
    i) maximum bending moment
    ii) shear force
    iii) punching shear
    The correct answer is

  2. A.

     only (i)

    B.

     (i) and (ii)

    C.

     (i) and (iii)

    D.

     (i), (ii) and (iii)

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  3. In the design of a front counterfort in a counterfort retaining wall, the main reinforcement is provided on
    i) bottom face near counterfort
    ii) top face near counterfort
    iii) bottom face near centre of span
    iv) top face near centre of span
    The correct answer is

  4. A.

     only (i)

    B.

     only (ii)

    C.

     both (i) and (iv)

    D.

     both (ii) and (iii)

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  5. The main reinforcement in the toe of a T- shaped R C. retaining wall is provided on
    i) top face parallel to the wall
    ii) top face perpendicular to the wall
    iii) bottom face paralleUo the wall
    iv) bottom face perpendicular to the wall
    The correct answer is

  6. A.

     only (ii) is correct

    B.

     (i) and (ii) are correct

    C.

     (iii) and (iv) are correct

    D.

     only (iv) is correct

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  7. Select the correct statement

  8. A.

     Elastic modulus of high tensile steel is nearly the same as that of mild steel

    B.

     Elastic modulus of high tensile steel is more than that of mild steel

    C.

     Carbon percentage in high carbon steel is less than that in mild steel

    D.

     High tensile steel is cheaper than mild steel

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  9. Select the incorrect statement

  10. A.

     Lean mixes bleed more as compared to rich ones.

    B.

     Bleeding can be minimized by adding pozzuolana finer aggregate.

    C.

     Bleeding can be increased by addition of calcium chloride.

    D.

     none of the above

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  11. Select the incorrect statement

  12. A.

     The loss of prestress is more in pre-tensioning system than in post-tensioning system.

    B.

     Pretensioning system has greater certainty about its durability.

    C.

     For heavy loads and large spans in buildings or bridges, post-tensioning system is cheaper than pretensioning system

    D.

     none of the above

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  13. To minimize the effect of differential settlement, the area of a footing should be designed for

  14. A.

     Dead load only

    B.

     Dead load + live load

    C.

     Dead load + fraction of live load

    D.

     Live load + fraction of dead load

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  15. The load carrying capacity of a helically reinforced column as compared to that of a tied column is about

  16. A.

     5% less

    B.

     10% less

    C.

     5% more

    D.

     10% more

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  17. If the permissible stress in steel in tension is 140 N/mm², then the depth of neutral axis for a singly reinforced rectangular balanced section will be

  18. A.

     0.35 d

    B.

     0.40 d

    C.

     0.45 d

    D.

     dependent on grade of concrete also

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  19. Maximum quantity of water needed per 50 kg of cement for M 15 grade of concrete is

  20. A.

     28 liters

    B.

     30 liters

    C.

     32 liters

    D.

     34 liters

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