Home / Civil Engineering / Concrete Technology and Design of Concrete Structures :: Section-4

Civil Engineering :: Concrete Technology and Design of Concrete Structures

  1. For a continuous slab of 3 m x 3.5 m size, the minimum overall depth of slab to satisfy vertical deflection limits is

  2. A.

     50 mm

    B.

     75 mm

    C.

     100 mm

    D.

     120 mm


  3. The main reinforcement in the heel of a T-shaped R.C. retaining wall is provided on

  4. A.

     top face perpendicular to wall

    B.

     bottom face perpendicular to wall

    C.

     both top and bottom faces perpendicular to wall

    D.

     none of the above


  5. For walls, columns and vertical faces of all structural members, the form work is generally removed after

  6. A.

     24 to 48 hours

    B.

     3 days

    C.

     7 days

    D.

     14 days


  7. As compared to ordinary portland cement, high alumina cement has

  8. A.

     higher initial setting time but lower final setting time

    B.

     lower initial setting time but higher final setting time

    C.

     higher initial and final setting times

    D.

     lower initial and final setting times


  9. The compressive strength of 100 mm cube as compared to 150 mm cube is always

  10. A.

     less

    B.

     more

    C.

     equal

    D.

     none of the above


  11. Approximate value of shrinkage strain in concrete, is

  12. A.

     0.003

    B.

     0.0003

    C.

     0.00003

    D.

     0.03


  13. A beam curved in plan is designed for

  14. A.

     bending moment and shear

    B.

     bending moment and torsion

    C.

     shear and torsion

    D.

     bending moment, shear and torsion


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

  16. A.

     1.5 and 2.2

    B.

     2.2 and 1.5

    C.

     1.5 and 1.5

    D.

     2.2 and 2.2


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

  18. A.

     workability admixtures

    B.

     accelerators

    C.

     retarders

    D.

     air entraining agents


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

  20. A.

     less than 1

    B.

     between 1 and 1.5

    C.

     between 1.5 and 2.0

    D.

     greater than 2