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Civil Engineering :: Concrete Technology and Design of Concrete Structures

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

  2. A.

     0.43 d

    B.

     0.55 d

    C.

     0.68 d

    D.

     0.85 d

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

  4. A.

     L-shaped wall

    B.

     T-shaped wall

    C.

     counterfort type

    D.

     all of the above

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

  6. 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

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  7. Which of the following has high tensile strength ?

  8. A.

     plain hot rolled wires

    B.

     cold drawn wires

    C.

     heat treated rolled wires

    D.

     all have same tensile strength

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  9. Minimum grade of concrete to be used in reinforced concrete as per IS:456-1978 is

  10. A.

     M15

    B.

     M20

    C.

     M10

    D.

     M25

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  11. The purpose of reinforcement in pre-stressed concrete is

  12. A.

     To provide adequate bond stress

    B.

     To resist tensile stresses

    C.

     To impart initial compressive stress in concrete

    D.

     All of the above

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  13. For a cantilever of effective depth of 0.5m, the maximum span to satisfy vertical deflection limit is

  14. A.

     3.5 m

    B.

     4 m

    C.

     4.5 m

    D.

     5 m

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  15. The relation between modulus of rupture fcr, splitting strength fcs and direct tensile strength fcl is given by

  16. A.

     tcr – rcs = tct

    B.

     fcr>fcs>fc.

    C.

     fcr<fcs</fcs

    D.

     fc5>fcr>fC

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  17. According to IS: 456-1978, the column or the strut is the member whose effective length is greater than

  18. A.

     The least lateral dimension

    B.

     2 times the least lateral dimension

    C.

     3 times the least lateral dimension

    D.

     4 times the least lateral dimension

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  19. If the depth of actual neutral axis in a beam is more than the depth of critical neutral axis, then the beam is called

  20. A.

     balanced beam

    B.

     under-reinforced beam

    C.

     over-reinforced beam

    D.

     none of the above

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