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. An R.C.C. roof slab is designed as a two way slab if
2. The maximum shear stress (q) in concrete of a reinforced cement concrete beam is
3. 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
4. An R.C.C. column is treated as short column if its slenderness ratio is less than
5. 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,
6. Distribution of shear intensity over a rectangular section of a beam, follows:
7. 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
8. If ‘W’ is weight of a retaining wall and ‘P’ is the horizontal earth pressure, the factor of safety against sliding, is
9. The width of the rib of a T-beam, is generally kept between
10. The thickness of base slab of a retaining wall generally provided, is
11. A T-beam behaves as a rectangular beam of a width equal to its flange if its neutral axis
12. If the sides of a slab simply supported on edges and spanning in two directions are equal, the maximum bending moment is multiplied by
13. In a simply supported slab, alternate bars are curtailed at
14. A part of the slab may be considered as the flange of the T-beam if
15. The advantage of a concrete pile over a timber pile, is
16. The maximum diameter of a bar used in a ribbed slab, is
17. [A + (m - 1)ASC] known as equivalent concrete area of R.C.C. is given by
18. If the size of a column is reduced above the floor, the main bars of the columns, are
19. After pre-stressing process is completed, a loss of stress is due to
20. The maximum area of tension reinforcement in beams shall not exceed
21. According to the steel beam theory of doubly reinforced beams
22. 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
23. 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
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. A ribbed slab is provided for
26. The thickness of the topping of a ribbed slab, varies between
27. 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
28. 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:
29. The percentage of minimum reinforcement of the gross sectional area in slabs, is
30. 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
31. 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
32. If ‘H’ is the overall height of a retaining wall retaining a surcharge, the width of the base slab usually provided, is
33. 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:
34. Bottom bars under the columns are extended into the interior of the footing slab to a distance greater than
35. The transverse reinforcements provided at right angles to the main reinforcement
36. The amount of reinforcement for main bars in a slab, is based upon
37. For initial estimate for a beam design, the width is assumed
38. Lapped splices in tensile reinforcement are generally not used for bars of size larger than
39. 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
40. 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
41. The width of the flange of a T-beam, which may be considered to act effectively with the rib depends upon
42. Pick up the incorrect statement from the following: Tensile reinforcement bars of a rectangular beam
43. The radius of a bar bend to form a hook, should not be less than
44. If T and R are tread and rise respectively of a stair, then
45. If A is the area of the foundation of a retaining wall carrying a load W and retaining earth of weight 'w' per unit volume, the minimum depth (h) of the foundation from the free surface of the earth, is
46. An intermediate T-beam reinforced with two layers of tensile steel with clear cover 13 cm encased with the floor of a hall 12 meters by 7 meters, is spaced at 3 meters from adjoining beams and if the width of the beam is 20 cm, the breadth of the flange is
47. Minimum spacing between horizontal parallel reinforcement of the same size should not be less than
48. Minimum spacing between horizontal parallel reinforcement of different sizes, should not be less than
49. If W is total load per unit area on a panel, D is the diameter of the column head, L is the span in two directions, then the sum of the maximum positive bending moment and average of the negative bending moment for the design of the span of a square flat slab, should not be less than
50. The diameter of main bars in R.C.C. columns, shall not be less than
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