Following are some of the multiple choice questions on the RCC Structures Design with answers that will help the students in developing their knowledge.
RCC Structures Design MCQ
1. If a rectangular pre-stressed beam of an effective span of 5 meters and carrying a total load 3840 kg/m, is designed by the load balancing method, the central dip of the parabolic tendon should be
2. The amount of reinforcement for main bars in a slab, is based upon
3. An R.C.C. roof slab is designed as a two way slab if
4. The advantage of a concrete pile over a timber pile, is
5. The maximum diameter of a bar used in a ribbed slab, is
6. The reinforced concrete beam which has width 25 cm, lever arm 40 cm, shear force 6t/cm², safe shear stress 5 kg/cm² and B.M. 24 mt,
7. [A + (m - 1)ASC] known as equivalent concrete area of R.C.C. is given by
8. For initial estimate for a beam design, the width is assumed
9. If the size of a column is reduced above the floor, the main bars of the columns, are
10. The transverse reinforcements provided at right angles to the main reinforcement
11. After pre-stressing process is completed, a loss of stress is due to
12. Lapped splices in tensile reinforcement are generally not used for bars of size larger than
13. An R.C.C. beam of 25 cm width and 50 cm effective depth has a clear span of 6 meters and carries a U.D.L. of 3000 kg/m inclusive of its self weight. If the lever arm constant for the section is 0.865, the maximum intensity of shear stress, is
14. The maximum area of tension reinforcement in beams shall not exceed
15. An R.C.C. lintel is spanning an opening of 2 m span in a brick wall. The height of the roof is 2.9 m above the floor level and that of the opening is 2.1 m above the floor level. The lintel is to be designed for self weight plus
16. The width of the flange of a T-beam, which may be considered to act effectively with the rib depends upon
17. According to the steel beam theory of doubly reinforced beams
18. Pick up the incorrect statement from the following: Tensile reinforcement bars of a rectangular beam
19. The percentage of minimum reinforcement of the gross sectional area in slabs, is
20. 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
21. The thickness of the topping of a ribbed slab, varies between
22. A ribbed slab is provided for
23. An R.C.C. column is treated as short column if its slenderness ratio is less than
24. The floor slab of a building is supported on reinforced cement floor beams. The ratio of the end and intermediate spans is kept
25. 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
26. 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
27. 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
28. If the maximum dip of a parabolic tendon carrying tension P is h and the effective length of the pre-stressed beam is L, the upward uniform pressure will be
29. 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:
30. Bottom bars under the columns are extended into the interior of the footing slab to a distance greater than
31. The thickness of base slab of a retaining wall generally provided, is
32. If ‘H’ is the overall height of a retaining wall retaining a surcharge, the width of the base slab usually provided, is
33. The width of the rib of a T-beam, is generally kept between
34. If p₁ and p₂ are mutually perpendicular principal stresses acting on a soil mass, the normal stress on any plane inclined at angle θ° to the principal plane carrying the principal stress p₁, is:
35. If ‘W’ is weight of a retaining wall and ‘P’ is the horizontal earth pressure, the factor of safety against sliding, is
36. The minimum clear cover for R.C.C. columns shall be
37. A pre-stressed rectangular beam which carries two concentrated loads W at L/3 from either end, is provided with a bent tendon with tension P such that central one-third portion of the tendon remains parallel to the longitudinal axis, the maximum dip h is
38. 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
39. A T-beam behaves as a rectangular beam of a width equal to its flange if its neutral axis
40. If the sides of a slab simply supported on edges and spanning in two directions are equal, the maximum bending moment is multiplied by
41. A foundation is called shallow if its depth, is
42. If the tendon is placed at an eccentricity e below the centroidal axis of the longitudinal axis of a rectangular beam (sectional modulus Z and stressed load P in tendon) the stress at the extreme top edge
43. If the length of an intermediate span of a continuous slab is 5 m, the length of the end span is kept
44. The maximum shear stress (q) in concrete of a reinforced cement concrete beam is
45. 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
46. An R.C.C beam of 25 cm width has a clear span of 5 metres and carries a U.D.L. of 2000 kg/m inclusive of its self weight. If the lever arm of the section is 45 cm., the beam is
47. If the ratio of long and short spans of a two way slab with corners held down is r, the actual reduction of B.M. is given by
48. In a pre-stressed beam carrying an external load W with a bent tendon is having angle of inclination ? and pre-stressed load P. The net downward load at the centre is
49. Total pressure on the vertical face of a retaining wall of height h acts parallel to free surface and from the base at a distance of
50. If L is the effective span of a R.C.C. beam which is subjected to maximum shear qmax at the ends, the distance from either end over which stirrups for the shear, are provided, is
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