rcc structures design MCQs – Page 6

Practise focused rcc structures design questions with marked answers for exam preparation and subject revision.

rcc structures design Mcqs
101. Design of R.C.C. simply supported beams carrying U.D.L. is based on the resultant B.M. at________________?
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A. Supports

B. Quarter span

C. Every section

D. Mid span
102. For stairs spanning l metres longitudinally between supports at the bottom and top of a flight carrying a load w per unit horizontal area, the maximum bending moment per metre width, is_______________?
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A. wl/4

B. wl/12

C. wl/8

D. wl/16
103. If the modular ratio is , steel ratio is and overall depth of a beam is , the depth of the critical neutral axis of the beam, is___________________?
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A. [m/(m + r)] d

B. [(r m)/m] d

C. [(m + r)/ m] d

D. [m/(m r)] d

104. The shear reinforcement in R.C.C. is provided to resist__________________?
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A. Diagonal compression

B. Horizontal shear

C. Vertical shear

D. Diagonal tension
105. Dimensions of a beam need be changed if the shear stress is more than_______________?
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A. 20 kg/cm2

B. 10 kg/cm2

C. 15 kg/cm2

D. 25 kg/cm2

106. The maximum ratio of span to depth of a cantilever slab, is_______________?
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A. 8

B. 16

C. 12

D. 10

107. For a circular slab carrying a uniformly distributed load, the ratio of the maximum negative to maximum positive radial moment, is___________________?
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A. 3

B. 1

C. 2

D. 5

108. A column is regarded as long column if the ratio of its effective length and lateral dimension, exceeds_________________?
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A. 25

B. 10

C. 20

D. 15
109. If the diameter of longitudinal bars of a square column is 16 mm, the diameter of lateral ties should not be less than____________________?
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A. 6 mm

B. 5 mm

C. 4 mm

D. 8 mm

110. The advantage of a concrete pile over a timber pile, is_______________?
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A. No decay due to termites

111. bending moment of a simply supported slab is M Kg.cm, the effective depth of the If the maximum slab is (where Q is M.R. factor)________________?
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A. M/100Q

B. M/ Q

C. M/Q)

D. (M/100Q)
112. 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________________?
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A. 8hp/ l

B. 8hl/p

C. 8hl/p

D. 8hp/l
113. If the diameter of the main reinforcement in a slab is 16 mm, the concrete cover to main bars is_____________?
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A. 10 mm

B. 14 mm

C. 12 mm

D. 16 mm
114. In a combined footing if shear stress exceeds 5 kg/cm2, the nominal stirrups provided are______________?
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A. 12 legged

B. 8 legged

C. 6 legged

D. 10 legged

115. If the length of a wall on either side of a lintel opening is at least half of its effective span L, the load W carried by the lintel is equivalent to the weight of brickwork contained in an equilateral triangle, producing a maximum bending moment____________________?
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A. WL/6

B. WL/2

C. WL/8

D. WL/4

116. is the pre-stressed force applied to the tendon of a rectangular pre-stressed beam whose area of cross section is and sectional modulus is . The maximum stress in the beam, subjected to a maximum bending moment , is_________________?
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A. f = (P/A) + (M/6Z)

B. f = (P/A) + (Z/M)

C. f = (A/P) + (M/Z)

D. f = (P/A) + (M/Z)
117. Pick up the true statement from the following?
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A. In the absence of beams, it is easier to install piping

B. All the above

C. In the absence of beams, it is easier to paint

D. Plain ceiling provides the best property diffusing light

118. For normal cases, stiffness of a simply supported beam is satisfied if the ratio of its span to its overall depth does not exceed________________?
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A. 10

B. 20

C. 15

D. 25

119. The length of the lap in a compression member is kept greater than bar diameter x (Permissible stress in bar / Five times the bond stress) or____________________?
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A. 18 bar diameters

B. 24 bar diameters

C. 12 bar diameters

D. 30 bar diameters

120. The maximum shear stress (q) in concrete of a reinforced cement concrete beam is_____________?
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A. Width/(Lever arm Shear force)

B. Lever arm/(Shear force Width)

C. Shear force/(Lever arm Width)

D. (Shear force Width)/Lever arm