61. Design of R.C.C. simply supported beams carrying U.D.L. is based on the resultant B.M. at________________?
A. Supports
B. Mid span
C. Every section
D. Quarter span
✅ The correct answer is option B.
RCC Structures Design MCQs
62. 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
✅ The correct answer is option B.
63. 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________________?
A. Is safe in shear
B. Is unsafe in shear
C. Is over safe in shear
D. Needs redesigning
✅ The correct answer is option B.
64. The maximum shear stress (qmax) in a rectangular beam is_______________?
A. 1.25 times the average
B. 1.50 times the average
C. 1.75 times the average
D. 2.0 times the average
✅ The correct answer is option B.
65. If the loading on a pre-stressed rectangular beam, is uniformly distributed, the tendon to be provided should be_______________?
A. Straight below centroidal axis
B. Parabolic with convexity downward
C. Parabolic with convexity upward
D. Straight above centroidal axis
✅ The correct answer is option B.
66. The effective width of a column strip of a flat slab, is_______________?
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
✅ The correct answer is option B.
67. 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_____________________?
A. WL/P
B. WL/2P
C. WL/3P
D. WL/4P
✅ The correct answer is option C.
68. 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_______________?
A. 18 bar diameters
B. 24 bar diameters
C. 30 bar diameters
D. 36 bar diameters
✅ The correct answer is option C.
69. The maximum permissible size of aggregates to be used in casting the ribs of a slab, is______________?
A. 5 mm
B. 7.5 mm
C. 10 mm
D. 15 mm
✅ The correct answer is option C.
70. The stresses developed in concrete and steel in reinforced concrete beam 25 cm width and 70 cm effective depth, are 62.5 kg/cm2 and 250 kg/cm 2 respectively. If m = 15, the depth of its neutral axis is_______________?
A. 20 cm
B. 25 cm
C. 30 cm
D. 35 cm
✅ The correct answer is option C.