rcc structures design Mcqs
53. Pick up the incorrect statement from the following: Tensile reinforcement bars of a rectangular beam_______________?
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A. Are bent up at suitable places to serve as shear reinforcement

B. Are bent down at suitable places to serve as shear reinforcement

C. Are curtailed if not required to resist the bending moment

D. Are maintained at bottom to provide at least local bond stress

59. A very comfortable type of stairs is_______________?
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A. Dog legged

B. Straight

C. Open newel

D. Geometrical

60. For a ribbed slab______________?
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A. Width of the rib shall not be less than 7.5 cm

B. Clear spacing between ribs shall not be greater than 4.5 cm

C. Overall depth of the slab shall not exceed four times the breadth of the rib

D. All the above
61. In a pre-stressed member it is advisable to use________________?
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A. High strength concrete and high tensile steel

B. Low strength concrete but high tensile steel

C. High strength concrete only

D. Low strength concrete only

66. The Youngs modulus of elasticity of steel, is__________________?
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A. 250 KN/mm2

B. 150 KN/mm2

C. 275 KN/mm2

D. 200 KN/mm2

67. the column head support a flat slab, is generally kept The diameter of_____________?
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A. 5.0 cm larger than the diameter of the column

B. 4.0 cm larger than the diameter of the column

C. 0.25 times the diameter of the column

D. 0.25 times the span length
68. For initial estimate for a beam design, the width is assumed__________________?
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A. 1/15th of span

B. 1/25th of span

C. 1/20th of span

D. 1/30th of span
69. If the shear stress in a R.C.C. beam is_______________?
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A. Equal or less than 5 kg/cm2, no shear reinforcement is provided

74. The amount of reinforcement for main bars in a slab, is based upon___________________?
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A. Maximum bending moment

B. Minimum bending moment

C. Minimum shear force

D. Maximum shear force

75. [A + (m 1)ASC] known as equivalent concrete area of R.C.C. is given by______________?
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A. Ultimate load method

B. Load factor method

C. None of these

D. Modular ratio method
82. As per I.S. 456 1978, the pH value of water shall be_______________?
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A. Equal to 6

B. Equal to 7

C. Not less than 6

D. Less than 6

85. If the loading on a pre-stressed rectangular beam, is uniformly distributed, the tendon to be provided should be_______________?
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A. Straight below centroidal axis

B. Straight above centroidal axis

C. Parabolic with convexity downward

D. Parabolic with convexity upward

86. The advantage of reinforced concrete, is due to_______________?
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A. Economy because of less maintenance cost

B. Fire-resisting and durability

C. Monolithic character

D. All the above
87. Post tensioning system_______________?
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A. Is economical for large spans and is adopted now a days

B. Was widely used in earlier days

C. Is not economical and hence not generally used

D. None of these
92. Bottom bars under the columns are extended into the interior of the footing slab to a distance greater than____________?
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A. 24 diameters from the centre of the column

B. 42 diameters from the outer edge of the column

C. 42 diameters from the inner edge of the column

D. 42 diameters from the centre of the column

93. A part of the slab may be considered as the flange of the T-beam if__________________?
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A. All the above

B. It is built integrally with the beam

C. It is effectively bonded together with the beam

D. Flange has adequate reinforcement transverse to beam

96. A pre-stressed concrete member__________________?
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A. Possesses internal stresses

B. Is made of reinforced concrete

C. Is made of concrete

D. Is stressed after casting

97. Pick up the incorrect statement from the following. The intensity of horizontal shear stress at the elemental part of a beam section, is directly proportional to__________________?
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A. Moment of the beam section about its neutral axis

B. Shear force

C. Distance of the C.G. of the area from its neutral axis

D. Area of the section

98. The breadth of a ribbed slab containing two bars must be between______________?
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A. 6 cm to 7.5 cm

B. 10 cm to 12 cm

C. 8 cm to 10 cm

D. 12 cm to 15 cm