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Civil Engineering :: Concrete Technology and Design of Concrete Structures

  1. A beam curved in plan is designed for

  2. A.

     bending moment and shear

    B.

     bending moment and torsion

    C.

     shear and torsion

    D.

     bending moment, shear and torsion

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  3. The load factors for live load and dead load are taken respectively as

  4. A.

     1.5 and 2.2

    B.

     2.2 and 1.5

    C.

     1.5 and 1.5

    D.

     2.2 and 2.2

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  5. Admixtures which cause early setting, and hardening of concrete are called

  6. A.

     workability admixtures

    B.

     accelerators

    C.

     retarders

    D.

     air entraining agents

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  7. Ratio of permissible stress in direct compression and bending compression is

  8. A.

     less than 1

    B.

     between 1 and 1.5

    C.

     between 1.5 and 2.0

    D.

     greater than 2

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  9. According to IS: 456-1978, the maximum reinforcement in a column is

  10. A.

     2 %

    B.

     4%

    C.

     6 %

    D.

     8 %

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  11. Minimum pitch of transverse reinforcement in a column is

  12. A.

     the least lateral dimension of the member

    B.

     sixteen times the smallest diameter of longitudinal reinforcement bar to be tied

    C.

     forty-eight times the diameter of transverse reinforcement

    D.

     lesser of the above three values

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  13. In case of hand mixing of concrete, the extra cement to be added is

  14. A.

     5%

    B.

     10%

    C.

     15%

    D.

     20%

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  15. Increase in the moisture content in concrete

  16. A.

     reduces the strength

    B.

     increases the strength

    C.

     does not change the strength

    D.

     all of the above

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  17. Which of the following statements is incorrect?

  18. A.

     Minimum cross sectional area of longitudinal reinforcement in a column is 0.8%

    B.

     Spacing of longitudinal bars measured along the periphery of column should not exceed 300 mm

    C.

     Reinforcing bars in a column should not be less than 12 mm in diameter

    D.

     The number of longitudinal bars provided in a circular column should not be less than four

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  19. Prestress loss due to friction occurs

  20. A.

     only in post-tensioned beams

    B.

     only in pretensioned beams

    C.

     in both post-tensioned and preten-sioned beams

    D.

     none of the above

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