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Civil Engineering :: RCC Structures Design

  1. If C is creep coefficient, f is original pre-stress in concrete, m is modular ratio, E is Young's modulus of steel and e is shrinkage strain, the combined effect of creep and shrinkage is:

  2. A.

     (1 - C) mf - eE

    B.

     (C - 1) mf + eE

    C.

     (C - 1) mf - eE

    D.

     (1 - C) mf + eE

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  3. The percentage of minimum reinforcement of the gross sectional area in slabs, is

  4. A.

     0.10 %

    B.

     0.12 %

    C.

     0.15 %

    D.

     0.18 %

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  5. If R and T are rise and tread of a stair spanning horizontally, the steps are supported by a wall on one side and by a stringer beam on the other side, the steps are designed as beams of width

  6. A.

     R + T

    B.

     T - R

    C.

     √(R² + T²)

    D.

     R - T

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  7. If ‘W’ is the uniformly distributed load on a circular slab of radius ‘R’ fixed at its ends, the maximum positive radial moment at its centre, is

  8. A.

     3WR²/16

    B.

     2WR²/16

    C.

     WR²/16

    D.

     None of these

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  9. The stem of a cantilever retaining wall which retains earth level with top is 6 m. If the angle of repose and weight of the soil per cubic metre are 30° and 2000 kg respectively, the effective width of the stem at the bottom, is

  10. A.

     51.5

    B.

     52.5

    C.

     53.5

    D.

     54.5

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  11. The floor slab of a building is supported on reinforced cement floor beams. The ratio of the end and intermediate spans is kept

  12. A.

     0.7

    B.

     0.8

    C.

     0.9

    D.

     0.6

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  13. An R.C.C. column is treated as short column if its slenderness ratio is less than

  14. A.

     30

    B.

     35

    C.

     40

    D.

     50

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  15. A ribbed slab is provided for

  16. A.

     A plain ceiling

    B.

     Thermal insulation

    C.

     Acoustic insulation

    D.

     All the above

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  17. The thickness of the topping of a ribbed slab, varies between

  18. A.

     3 cm to 5 cm

    B.

     5 cm to 8 cm

    C.

     8 cm to 10 cm

    D.

     12 cm to 15 cm

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  19. The diameter of transverse reinforcement of columns should be equal to one-fourth of the diameter of the main steel rods but not less than

  20. A.

     4 mm

    B.

     5 mm

    C.

     6 mm

    D.

     7 mm

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