rcc structures design MCQs – Page 8

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

rcc structures design Mcqs
141. An R.C.C. column is treated as short column if its slenderness ratio is less than_______________?
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A. 40

B. 30

C. 50

D. 35

142. If the maximum shear stress at the end of a simply supported R.C.C. beam of 16 m effective span is 10 kg/cm2, the length of the beam having nominal reinforcement, is________________?
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A. 8 cm

B. 6 m

C. 10 m

D. 8 m
143. The width of the flange of a T-beam should be less than_________________?
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A. Least of the above

B. One- third of the effective span of the T -beam

C. Breadth of the rib plus twelve times the thickness of the slab

D. Distance between the centres of T-beam

144. The system in which high tensile alloy steel bars (silica manganese steel) are used as prestressing tendons, is known as________________?
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A. Lee-McCall system

B. Freyssinet system

C. Magnel-Blaton system

D. C.C.L. standard system

145. A ribbed slab is provided for______________?
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A. A plain ceiling

B. Acoustic insulation

C. Thermal insulation

D. All the above
146. Pick up the incorrect statement from the following?
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A. In the stem of a retaining wall, reinforcement is provided near the earth side

B. None of these

C. In the toe slab of a retaining wall, reinforcement is provided at the bottom of the slab

D. In the heel slab of a retaining wall, reinforcement is provided at the top of the slab

147. In a singly reinforced beam, the effective depth is measured from its compression edge to_________________?
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A. Tensile edge

B. Tensile reinforcement

C. Longitudinal central axis

D. Neutral axis of the beam

148. If the maximum shear stress at the end of a simply supported R.C.C. beam of 6 m effective span is 10 kg/cm2, the share stirrups are provided for a distance from either end where, is________________?
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A. 150 cm

B. 50 cm

C. 200 cm

D. 100 cm

149. The angle of internal friction of soil mass is the angle whose_______________?
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A. Sine is equal to the ratio of the maximum resistance to sliding on any internal inclined plane to the normal pressure acting on the plane

B. None of these

C. Cosine is equal to the ratio of the maximum resistance sliding on any internal inclined plane to the normal pressure acting on the plane

D. Tangent is equal to the rate of the maximum resistance to sliding on any internal inclined plane to the normal pressure acting on the plane
150. The diameter of longitudinal bars of a column should never be less than_____________?
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A. 12 mm

B. 8 mm

C. 10 mm

D. 6 mm

151. As the percentage of steel increases________________?
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A. Lever arm increases

B. Depth of neutral axis decreases

C. Depth of neutral axis increases

D. Lever arm decreases

152. The thickness of base slab of a retaining wall generally provided, is_____________?
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A. Width of the stem at the bottom

B. One -third of the width of the stem at the bottom

C. One fourth of the width of the steam at the bottom

D. One half of the width of the stem at the bottom

153. In a combined footing for two columns carrying unequal loads, the maximum hogging bending moment occurs at
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A. More loaded column

B. A point of the maximum shear force

C. A point of zero shear force

D. Less loaded column

154. The maximum area of tension reinforcement in beams shall not exceed_______________?
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A. 4 %

B. 1.50%

C. 1%

D. 0.15%

155. The weight of reinforced concrete, is generally taken as______________?
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A. 2200 kg/m3

B. 2400 kg/m3

C. 2300 kg/m3

D. 2500 kg/m3

156. The minimum cube strength of concrete used for a pre-stressed member, is________________?
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A. 150 kg/cm 2

B. 50 kg/cm2

C. 350 kg/cm2

D. 250 kg/cm2

157. An intermediate T-beam reinforced with two layers of tensile steel with clear cover 13 cm encasted with the floor of a hall 12 metres by 7 metres, is spaced at 3 metres from adjoining beams and if the width of the beam is 20 cm, the breadth of the flange is__________________?
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A. 176 cm

B. 300 cm

C. 236 cm

D. 233 cm

158. An R.C.C. beam of 25 cm width and 50 cm effective depth has a clear span of 6 metres 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_______________?
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A. 21.5 kg/cm 2

B. 11.4 kg/cm2

C. 8.3 kg/cm2

D. 7.6 kg/cm2

159. Based on punching shear consideration, the overall depth of a combined footing under a column A, is_______________?
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A. None of these

B. (Perimeter of column A Safe punching stress)/(Load on column A Upward pressure Area of the column)

C. (Perimeter of column A Safe punching stress)/(Load on column A + Upward pressure Area of the column)

D. (Area of the column A Safe punching stress)/Load on column A

160. The effective span of a simply supported slab, is_______________?
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A. Distance between the centres of the bearings

B. Clear span plus effective depth of the slab

C. None of these

D. Clear distance between the inner faces of the walls plus twice the thickness of the wall