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Civil Engineering :: Concrete Technology and Design of Concrete Structures

  1. A higher modular ratio shows

  2. A.

     higher compressive strength of con-crete

    B.

     lower compressive strength of concrete

    C.

     higher tensile strength of steel

    D.

     lower tensile strength of steel


  3. Normally prestressing wires are arranged in the

  4. A.

     upper part of the beam

    B.

     lower part of the beam

    C.

     center

    D.

     anywhere


  5. Modulus of rupture of concrete is a measure of

  6. A.

     flexural tensile strength

    B.

     direct tensile strength

    C.

     compressive strength

    D.

     split tensile strength


  7. In order to obtain the best workability of concrete, the preferred shape of aggregate is

  8. A.

     rounded

    B.

     elongated

    C.

     angular

    D.

     all of the above


  9. In a counterfort retaining wall, the main reinforcement is provided on the
    i) bottom face in front counterfort
    ii) inclined face in front counterfort
    iii) bottom face in back counterfort
    iv) inclined face in back counterEort
    The correct answer is

  10. A.

     (i) and (ii),

    B.

     (ii) and (iii)

    C.

     (i) and (iv)

    D.

     (iii) and (iv)


  11. The effect of adding calcium chloride in concrete is
    i) to increase shrinkage
    ii) to decrease shrinkage
    iii) to increase setting time
    iv) to decrease setting time
    The correct answer is

  12. A.

     (i) and (iii)

    B.

     (i)and(iv)

    C.

     (ii) and (iii)

    D.

     (ii) and (iv)


  13. According to ISI recommendations, the maximum depth of stress block for balanced section of a beam of effective depth d is

  14. A.

     0.43 d

    B.

     0.55 d

    C.

     0.68 d

    D.

     0.85 d


  15. Which of the following R.C. retaining walls is suitable for heights beyond 6m?

  16. A.

     L-shaped wall

    B.

     T-shaped wall

    C.

     counterfort type

    D.

     all of the above


  17. In T-shaped R C. retaining walls, the main reinforcement in the stem is provided on

  18. A.

     the front face in one direction

    B.

     the front face in both directions

    C.

     the inner face in one direction

    D.

     the inner face in both directions


  19. Which of the following has high tensile strength ?

  20. A.

     plain hot rolled wires

    B.

     cold drawn wires

    C.

     heat treated rolled wires

    D.

     all have same tensile strength