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Civil Engineering :: Concrete Technology and Design of Concrete Structures

  1. As compared to ordinary portland cement, use of pozzuolanic cement

  2. A.

     reduces workability

    B.

     increases bleeding

    C.

     increases shrinkage

    D.

     increases strength


  3. Which of the following losses of prestress occurs only in pretensioning and not in post-tensioning ?

  4. A.

     elastic shortening of concrete

    B.

     shrinkage of concrete

    C.

     creep of concrete

    D.

     loss due to friction


  5. If nominal shear stress tv exceeds the design shear strength of concrete xc, the nominal shear reinforcement as per IS : 456-1978 shall be provided for carrying a shear stress equal to

  6. A.

     xv

    B.

     xc

    C.

     Tv + Tc

    D.


  7. Due to circumferential action of the spiral in a spirally reinforced column

  8. A.

     Capacity of column is decreased

    B.

     Ductility of column reduces

    C.

     Capacity of column is decreased but ductility of column increases

    D.

     Both the capacity of column and ductility of column increase


  9. The temperature reinforcement in the vertical slab of a T-shaped R.C. retaining wall is

  10. A.

     Not needed

    B.

     Provided equally on inner and front faces

    C.

     Provided more on inner face than on front face

    D.

     Provided more on front face than on inner face


  11. Finer grinding of cement

  12. A.

     affects only the early development of strength

    B.

     affects only the ultimate strength

    C.

     both (a) and (b)

    D.

     does not affect the strength


  13. For the design of retaining walls, the minimum factor of safety against overturning is taken as

  14. A.

     1.5

    B.

     2.0

    C.

     2.5

    D.

     3.0


  15. The minimum diameter of longitudinal bars in a column is

  16. A.

     6 mm

    B.

     8 mm

    C.

     12 mm

    D.

     16 mm


  17. Maximum distance between expansion joints in structures as per IS : 456 – 1978 is

  18. A.

     20 m

    B.

     30 m

    C.

     45 m

    D.

     60 m


  19. The fineness modulus of fine aggregate is in the range of

  20. A.

     2.0 to 3.5

    B.

     3.5 to 5.0

    C.

     5.0 to 7.0

    D.

     6.0 to 8.5