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Civil Engineering :: RCC Structures Design

  1. Based on punching shear consideration, the overall depth of a combined footing under a column A, is

  2. A.

     (Area of the column A × Safe punching stress)/Load on column A

    B.

     (Perimeter of column A × Safe punching stress)/(Load on column A + Upward pressure × Area of the column)

    C.

     (Perimeter of column A × Safe punching stress)/(Load on column A × Upward pressure × Area of the column)

    D.

     None of these


  3. According to load factor method, the permissible load ‘W’ on a short column reinforced with longitudinal bars and lateral stirrups, is

  4. A.

     Stress in concrete × area of concrete

    B.

     Stress in steel × area of steel

    C.

     Stress in concrete × area of concrete + Stress in steel × area of steel

    D.

     None of these


  5. High strength concrete is used in pre-stressed member

  6. A.

     To overcome high bearing stresses developed at the ends

    B.

     To overcome bursting stresses at the ends

    C.

     To provide high bond stresses

    D.

     All the above


  7. Design of R.C.C. cantilever beams, is based on the resultant force at

  8. A.

     Fixed end

    B.

     Free end

    C.

     Mid span

    D.

     Mid span and fixed support


  9. The diameter of longitudinal bars of a column should never be less than

  10. A.

     6 mm

    B.

     8 mm

    C.

     10 mm

    D.

     12 mm


  11. The effective width of a column strip of a flat slab, is

  12. A.

     One-fourth the width of the panel

    B.

     Half the width of the panel

    C.

     Radius of the column

    D.

     Diameter of the column


  13. The neutral axis of a T-beam exists

  14. A.

     Within the flange

    B.

     At the bottom edge of the slab

    C.

     Below the slab

    D.

     All the above


  15. The length of lap in tension reinforcement should not be less than the bar diameter × (actual tension / four times the permissible average bond stress) if it is more than

  16. A.

     18 bar diameters

    B.

     24 bar diameters

    C.

     30 bar diameters

    D.

     36 bar diameters


  17. As the percentage of steel increases

  18. A.

     Depth of neutral axis decreases

    B.

     Depth of neutral axis increases

    C.

     Lever arm increases

    D.

     Lever arm decreases


  19. A raft foundation is provided if its area exceeds the plan area of the building by

  20. A.

     10 %

    B.

     20 %

    C.

     40 %

    D.

     50 %