rcc structures design MCQs – Page 10

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

rcc structures design Mcqs

181. The horizontal portion of a step in a stairs case, is known as_________________?
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A. Flight

B. Tread

C. Rise

D. Winder

182. If permissible working stresses in steel and concrete are respectively 1400 kg/cm2 and 80 kg/cm2 and modular ratio is 18, in a beam reinforced in tension side and of width 30 cm and having effective depth 46 cm, the lever arms of the section, is______________?
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A. 37 cm

183. If the length of an intermediate span of a continuous slab is 5m, the length of the end span is kept_______________?
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A. 3.5 m

B. 4.0 m

C. 4.5 m

D. 3.0 m

184. 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
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A. (5/6) (r/1 + r4) M

B. (5/6) (r/1 + r) M

C. (5/6) (r/1 + r) M

D. (5/6) (r/1 + r3) M

185. A foundation rests on_______________?
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A. Base of the foundation

B. Sub-grade

C. Foundation soil

D. Both B. and C

186. The section of a reinforced beam where most distant concrete fibre in compression and tension in steel attains permissible stresses simultaneously, is called_________________?
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A. Economic section

B. Critical section

C. All the above

D. Balanced section

187. Pick up the correct statement from the following?
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A. Lateral reinforcement stops breaking away of concrete cover, due to buckling

B. All the above

C. Lateral reinforcement prevents the shearing of concrete on diagonal plane

D. Lateral reinforcement in R.C.C. columns is provided to prevent the longitudinal reinforcement from buckling

188. A flat slab is supported_______________?
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A. On beams

B. On beams and columns

C. On columns

D. On columns monolithically built with slab

189. A singly reinforced beam has breadth b, effective depth d, depth of neutral axis n and critical neutral axis n1. If fc and ft are permissible compressive and tensile stresses, the moment to resistance of the beam, is____________________?
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A. n1 (1 n1/3) cbd

B. All the above

C. bn (fc/2) (d n/3)

D. Atft (d n/3)

190. According to I.S.: 456, 1978 the thickness of reinforced concrete footing on piles at its edges, is kept less than______________?
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A. 15 cm

B. 20 cm

C. 5 cm

D. 10 cm

191. The width of the flange of a T-beam, which may be considered to act effectively with the rib depends upon____________________?
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A. All the above

B. Breadth of the rib

C. Overall thickness of the rib

D. Centre to centre distance between T-beams

192. If depth of slab is 10 cm, width of web 30 cm, depth of web 50 cm, centre to centre distance of beams 3 m, effective span of beams 6 m, the effective flange width of the beam, is________________?
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A. 200 cm

B. 100 cm

C. 300 cm

D. 150 cm

193. The radius of a bar bend to form a hook, should not be less than_______________?
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A. Four times the diameter

B. Thrice the diameter

C. Twice the diameter

D. Five times the diameter

194. The maximum diameter of a bar used in a ribbed slab, is______________?
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A. 12 mm

B. 20 mm

C. 6 mm

D. 22 mm

195. effective depth and depth of the neutral axis respectively of a singly reinforced If d and n are the beam, the lever arm of the beam, is_________________?
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A. n

B. d

C. d n/3

D. d + n/3

196. An R.C.C. column is treated as long if its slenderness ratio is greater than____________?
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A. 35

B. 30

C. 40

D. 50

197. According to the steel beam theory of doubly reinforced beams______________?
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A. Stress in tension steel equals the stress in compression steel

B. Tension is resisted by tension steel

C. Compression is resisted by compression steel

D. All the above

198. 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_________________?
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A. 15 cm

B. 10 cm

C. 20 cm

D. 5 cm

199. To have pressure wholly compressive under the base of a retaining wall of width b, the resultant of the weight of the wall and the pressure exerted by the retained, earth should have eccentricity not more than________________?
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A. b/3

B. b/4

C. b/5

D. b/6

200. A continuous beam shall be deemed to be a deep beam if the ratio of effective span to overall depth, is______________?
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A. 2

B. Less than 2

C. Less than 2.5

D. 2.5

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