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Civil Engineering :: Concrete Technology and Design of Concrete Structures

  1. To determine the modulus of rupture, the size of test specimen used is

  2. A.

     150 x150 x500 mm

    B.

     100 x100 x700 mm

    C.

     150 x150 x700 mm

    D.

     100 x100 x500 mm


  3. High carbon content in the steel causes

  4. A.

     decrease in tensile strength but increase in ductility

    B.

     increase in tensile strength but decrease in ductility

    C.

     decrease in both tensile strength and ductility

    D.

     increase in both tensile strength and ductility


  5. The slab is designed as one way if the ratio of long span to short span is

  6. A.

     less than 1

    B.

     between 1 and 1.5

    C.

     between 1.5 and 2

    D.

     greater than 2


  7. A continuous beam is deemed to be a deep beam when the ratio of effective span to overall depth (1/D) is less than

  8. A.

     1.5

    B.

     2.0

    C.

     2.5

    D.

     3.0


  9. According to IS : 456- 1978, minimum slenderness ratio for a short column is

  10. A.

     less than 12

    B.

     less than 18

    C.

     between 18 and 24

    D.

     more than 24


  11. Maximum percentage reinforcement in case of slabs is limited to

  12. A.

     2

    B.

     4

    C.

     6

    D.

     8


  13. The property of fresh concrete, in which the water in the mix tends to rise to the surface while placing and compacting, is called

  14. A.

     segregation

    B.

     bleeding

    C.

     bulking

    D.

     creep


  15. A T-shaped retaining wall mainly conssits of

  16. A.

     one cantilever

    B.

     two cantilevers

    C.

     three cantilevers

    D.

     four cantilevers


  17. In a counterfort retaining wall, the main reinforcement in the stem at mid span is provided on

  18. A.

     front face only

    B.

     inner face only

    C.

     both front face and inner face

    D.

     none of the above


  19. The average permissible stress in bond for plain bars in tension is

  20. A.

     increased by 10% for bars in compression

    B.

     increased by 25% for bars in compression

    C.

     decreased by 10% for bars in compression

    D.

     decreased by 25% for bars in compression