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Civil Engineering :: RCC Structures Design

  1. The self-weight of the footing, is

  2. A.

     Not considered for calculating the upward pressure on footing

    B.

     Also considered for calculating the upward pressure on footing

    C.

     Not considered for calculating the area of the footing

    D.

     Both (b) and (c)


  3. If permissible working stresses in steel and concrete are respectively 1400 kg/cm² and 80 kg/cm² and modular ratio is 18, in a beam reinforced in tension side and of width 30 cm and having effective depth 46 cm, the lever arms of the section, is

  4. A.

     37 cm

    B.

     38 cm

    C.

     39 cm

    D.

     40 cm


  5. The pitch of the main bars in a simply supported slab, should not exceed its effective depth by

  6. A.

     Three times

    B.

     Four times

    C.

     Five times

    D.

     Six times


  7. Top bars are extended to the projecting parts of the combined footing of two columns L distance apart for a distance of

  8. A.

     0.1 L from the outer edge of column

    B.

     0.1 L from the centre edge of column

    C.

     Half the distance of projection

    D.

     One-fourth the distance of projection


  9. For a ribbed slab

  10. A.

     Clear spacing between ribs shall not be greater than 4.5 cm

    B.

     Width of the rib shall not be less than 7.5 cm

    C.

     Overall depth of the slab shall not exceed four times the breadth of the rib

    D.

     All the above


  11. Design of a two way slab simply supported on edges and having no provision to prevent the corners from lifting, is made by

  12. A.

     Rankine formula

    B.

     Marcus formula

    C.

     Rankine Grashoff formula

    D.

     Grashoff formula


  13. Cantilever retaining walls can safely be used for a height not more than

  14. A.

     3 m

    B.

     4 m

    C.

     5 m

    D.

     6 m


  15. If the bearing capacity of soil is 10 tonnes/cm² and the projection of plain concrete footing from walls, is a cm, the depth D of footing is

  16. A.

     D = 0.0775 a

    B.

     D = 0.775 a

    C.

     D = 0.775 √a

    D.

     D = 0.775 a²


  17. For normal cases, stiffness of a simply supported beam is satisfied if the ratio of its span to its overall depth does not exceed

  18. A.

     10

    B.

     15

    C.

     20

    D.

     25


  19. If depth of slab is 10 cm, width of web 30 cm, depth of web 50 cm, centre to centre distance of beams 3 m, effective span of beams 6 m, the effective flange width of the beam, is

  20. A.

     200 cm

    B.

     300 cm

    C.

     150 cm

    D.

     100 cm