RCC Structures Design

101. If the diameter of longitudinal bars of a square column is 16 mm, the diameter of lateral ties should not be less than

  1. 4 mm
  2. 5 mm
  3. 6 mm
  4. 8 mm

Correct answer: (B)
5 mm

102. If the diameter of the main reinforcement in a slab is 16 mm, the concrete cover to main bars is

  1. 10 mm
  2. 12 mm
  3. 14 mm
  4. 16 mm

Correct answer: (D)
16 mm

103. If the effective length of a 32 cm diameter R.C.C. column is 4.40 m, its slenderness ratio, is

  1. 40
  2. 45
  3. 50
  4. 55

Correct answer: (D)
55

104. 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

  1. WL/2
  2. WL/4
  3. WL/6
  4. WL/8

Correct answer: (C)
WL/6

105. If the length of an intermediate span of a continuous slab is 5m, the length of the end span is kept

  1. 4.5 m
  2. 4.0 m
  3. 3.5 m
  4. 3.0 m

Correct answer: (A)
4.5 m

106. If the loading on a pre-stressed rectangular beam, is uniformly distributed, the tendon to be provided should be.

  1. Straight below centroidal axis
  2. Parabolic with convexity downward
  3. Parabolic with convexity upward
  4. Straight above centroidal axis

Correct answer: (B)
Parabolic with convexity downward

107. If the maximum bending moment of a simply supported slab is M Kg.cm, the effective depth of the slab is (where Q is M.R. factor)

  1. M/100Q
  2. M/√Q
  3. √M/Q)
  4. √(M/100Q)

Correct answer: (D)
√(M/100Q)

108. 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

  1. 8hp/l
  2. 8hp/l2
  3. 8hl/p
  4. 8hl/p2

Correct answer: (B)
8hp/l2

109. 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

  1. 8 cm
  2. 6 m
  3. 8 m
  4. 10 m

Correct answer: (C)
8 m

110. 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 'x' from either end where, 'x'is

  1. 50 cm
  2. 100 cm
  3. 150 cm
  4. 200 cm

Correct answer: (C)
150 cm

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