RCC Structures Design Objective Practice - Set 01 - ObjectiveBooks

# Practice Test: Question Set - 01

1. An R.C.C. beam of 6 m span is 30 cm wide and has a lever arm of 55 cm. If it carries a U.D.L. of 12 t per m and allowable shear stress is 5 kg/cm2, the beam
(A) Is safe in shear
(B) Is safe with stirrups
(C) Is safe with stirrups and inclined bars
(D) Needs revision of section

2. According to I.S. : 456, slabs which span in two directions with corners held down, are assumed to be divided in each direction into middle strips and edge strips such that the width of the middle strip, is
(A) Half of the width of the slab
(B) Two-third of the width of the slab
(C) Three-fourth of the width of the slab
(D) Four-fifth of the width of the slab

3. The load stress of a section can be reduced by
(A) Decreasing the lever arm
(B) Increasing the total perimeter of bars
(C) Replacing larger bars by greater number of small bars
(D) Replacing smaller bars by greater number of greater bars

4. The diameter of the column head support a flat slab, is generally kept
(A) 0.25 times the span length
(B) 0.25 times the diameter of the column
(C) 4.0 cm larger than the diameter of the column
(D) 5.0 cm larger than the diameter of the column

5. 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
(A) 3WR²/16
(B) 2WR²/16
(C) WR²/16
(D) None of these

6. The maximum ratio of span to depth of a slab simply supported and spanning in one direction, is
(A) 35
(B) 25
(C) 30
(D) 20

7. If the width of the foundation for two equal columns is restricted, the shape of the footing generally adopted, is
(A) Square
(B) Rectangular
(C) Trapezoidal
(D) Triangular

8. The floor slab of a building is supported on reinforced cement floor beams. The ratio of the end and intermediate spans is kept
(A) 0.7
(B) 0.8
(C) 0.9
(D) 0.6

9. Pick up the correct statement from the following:
(A) Lateral reinforcement in R.C.C. columns is provided to prevent the longitudinal reinforcement from buckling
(B) Lateral reinforcement prevents the shearing of concrete on diagonal plane
(C) Lateral reinforcement stops breaking away of concrete cover, due to buckling
(D) All the above

10. In case the factor of safety against sliding is less than 1.5, a portion of slab is constructed downwards at the end of the heel slab, which is known as
(A) A key
(B) A cut-off wall
(C) A rib
(D) All the above

11. Lapped splices in tensile reinforcement are generally not used for bars of size larger than
(A) 18 mm diameter
(B) 24 mm diameter
(C) 30 mm diameter
(D) 36 mm diameter

12. Minimum spacing between horizontal parallel reinforcement of the same size should not be less than
(A) One diameter
(B) 2.5 diameters
(C) 3 diameters
(D) 3.5 diameters

13. For a ribbed slab
(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

14. A very comfortable type of stairs is
(A) Straight
(B) Dog legged
(C) Geometrical
(D) Open newel

15. Columns may be made of plain concrete if their unsupported lengths do not exceed their least lateral dimension
(A) Two times
(B) Three times
(C) Four times
(D) Five times

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