51. For M 150 grade concrete (1:2:4) the moment of resistance factor is_________________?
A. 0.87
B. 8.50
C. 7.50
D. 5.80
✅ The correct answer is option B.
RCC Structures Design MCQs
52. The breadth of a ribbed slab containing two bars must be between______________?
A. 6 cm to 7.5 cm
B. 8 cm to 10 cm
C. 10 cm to 12 cm
D. 12 cm to 15 cm
✅ The correct answer is option B.
53. 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________________?
A. (1 – C) mf – eE
B. (C – 1)mf + eE
C. (C – 1)mf – eE
D. (1 – C)mf + eE
✅ The correct answer is option B.
54. An R.C.C. roof slab is designed as a two way slab if________________?
A. It supports live loads in both directions
B. The ratio of spans in two directions is less than 2
C. The slab is continuous over two supports
D. The slab is discontinuous at edges
✅ The correct answer is option B.
55. The effective span of a simply supported slab, is_______________?
A. Distance between the centres of the bearings
B. Clear distance between the inner faces of the walls plus twice the thickness of the wall
C. Clear span plus effective depth of the slab
D. None of these
✅ The correct answer is option B.
56. The ratio of the breadth to effective depth of a beam is kept_______________?
A. 0.25
B. 0.50
C. 0.70
D. 0.75
✅ The correct answer is option B.
57. Side face reinforcement shall be provided in the beam when depth of the web in a beam exceeds_____________?
A. 50 cm
B. 75 cm
C. 100 cm
D. 120 cm
✅ The correct answer is option B.
58. 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_________________?
A. 5 cm
B. 10 cm
C. 15 cm
D. 20 cm
✅ The correct answer is option B.
59. For M 150 mix concrete, according to I.S. specifications, local bond stress, is_________________?
A. 5 kg/cm2
B. 10 kg/cm 2
C. 15 kg/cm2
D. 20 kg/cm2
✅ The correct answer is option B.
60. The amount of reinforcement for main bars in a slab, is based upon___________________?
A. Minimum bending moment
B. Maximum bending moment
C. Maximum shear force
D. Minimum shear force
✅ The correct answer is option B.