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Civil Engineering :: RCC Structures Design

  1. If the maximum bending moment of a simply supported slab is M Kg.cm, the effective depth of the slab is (where Q is M.R. factor)

  2. A.

     M/100Q

    B.

     M/10√Q

    C.

     √(M/Q)

    D.

     √(M/100Q)


  3. If jd is the lever arm and ΣO is the total perimeter of reinforcement of an R.C.C. beam, the bond stress at the section having Q shear force, is

  4. A.

     Q/2jdƩO

    B.

     Q/3jdƩO

    C.

     Q/jdƩO

    D.

     2 × Q/jdƩO


  5. The minimum head room over a stair must be

  6. A.

     200 cm

    B.

     205 cm

    C.

     210 cm

    D.

     230 cm


  7. If the diameter of the main reinforcement in a slab is 16 mm, the concrete cover to main bars is

  8. A.

     10 mm

    B.

     12 mm

    C.

     14 mm

    D.

     16 mm


  9. Total pressure on the vertical face of a retaining wall of height ‘h’ per unit run exerted by the retained earth weighing ‘w’ per unit volume, is

  10. A.

     wh [(1 - sin φ)/(1 + sin φ)]

    B.

     wh² [(1 - sin φ)/(1 + sin φ)]

    C.

     wh² [(1 - sin φ)/2(1 + sin φ)]

    D.

     wh² [(1 - sin φ)/3(1 + sin φ)]


  11. According to I.S. : 456 specifications, the safe diagonal tensile stress for M 150 grade concrete, is

  12. A.

     5 kg/cm²

    B.

     10 kg/cm²

    C.

     15 kg/cm²

    D.

     20 kg/cm²


  13. For a circular slab carrying a uniformly distributed load, the ratio of the maximum negative to maximum positive radial moment, is

  14. A.

     1

    B.

     2

    C.

     3

    D.

     5


  15. If the width of the foundation for two equal columns is restricted, the shape of the footing generally adopted, is

  16. A.

     Square

    B.

     Rectangular

    C.

     Trapezoidal

    D.

     Triangular


  17. If the maximum shear stress at the end of a simply supported R.C.C. beam of 16 m effective span is 10 kg/cm², the length of the beam having nominal reinforcement, is

  18. A.

     12 cm

    B.

     6 cm

    C.

     8 cm

    D.

     10 cm


  19. Dimensions of a beam need be changed if the shear stress is more than

  20. A.

     10 kg/cm²

    B.

     15 kg/cm²

    C.

     20 kg/cm²

    D.

     25 kg/cm²