RCC Sheet 48

1) Question.

For simply supported beams of spans above 10 m, span to depth ratio 20 must be multiplied to get permitted value by

in metres
Answer.
- 1
  
  $\frac{10}{s p a n}$
- 2
  
  $\frac{15}{s p a n}$
- 3
  
  $\frac{20}{s p a n}$
- 4
  
  $\frac{25}{s p a n}$
Answer: 1

Explanation:
2) Question.

The criterion of vertical deflection is satisfied for simply supported beams for spans up to 10 m if span to depth ratio is not greater than
Answer.
- 1
  
  7
- 2
  
  20
- 3
  
  26
- 4
  
  15
Answer: 2

Explanation:
3) Question.

The criterion of vertical deflection is satisfied for cantilever for spans up to 10 m if span to depth ratio is not greater than
Answer.
- 1
  
  7
- 2
  
  20
- 3
  
  16
- 4
  
  15
Answer: 1

Explanation:
4) Question.

The deflection of structure designed by limit state methods, due to all loads including the effects of temperature, creep and shrinkage below the as-cast level of the supports of roofs, floors and all other horizontal members should not normally exceed the lesser value
Answer.
- 1
  
  $\frac{s p a n}{350} o r 20 m m$
- 2
  
  $\frac{s p a n}{250} o r 20 m m$
- 3
  
  $\frac{s p a n}{200} o r 15 m m$
- 4
  
  $\frac{s p a n}{300} o r 25 m m$
Answer: 1

Explanation:
5) Question.

The deflection of a structure designed by limit state method, due to all loads including theeffects of temperature, creep and shrinkage below the as-cast level of the supports of roofs, floors and all other horizontal members should not normally exceed
Answer.
- 1
  
  $\frac{s p a n}{150}$
- 2
  
  $\frac{s p a n}{200}$
- 3
  
  $\frac{s p a n}{250}$
- 4
  
  $\frac{s p a n}{300}$
Answer: 3

Explanation:
6) Question.

If $x_{1}$ and $x_{2}$ are half the clear distance between two adjacement beams for contimuous beams, the effective width of the T-beams is

where bw is the breath of the rib
Answer.
- 1
  
  $x_{1} + x_{2} + b w$
- 2
  
  $\frac{1}{2} (x_{1} + x_{2}) + b w$
- 3
  
  $x_{1} + x_{2} + = b w$
- 4
  
  $(x_{1} + x_{2}) + b w$
Answer: 1

Explanation:
7) Question.

If the breadth of the rib = bw, actual width of flange = b, the distance between points of zeroment in a flanged beam = $l_{o}$ the effective depth of flange = $D_{f}$ , then effective width of flange is
Answer.
- 1
  
  $\frac{l_{o}}{2} + b w + 6 D_{f}$
- 2
  
  $\frac{l_{o}}{4} + b w + 4 D_{f}$
- 3
  
  $\frac{l_{o}}{6} + b w + 6 D_{f}$
- 4
  
  $\frac{l_{o}}{3} + b w + 3 D_{f}$
Answer: 3

Explanation:
8) Question.

The aspect ratio of slab is:
Answer.
- 1
  
  the ratio of length to breadth
- 2
  
  the ratio of breadth and length
- 3
  
  the ratio of superimposed load and the self weight
- 4
  
  none of these
Answer: 1

Explanation:
9) Question.

The intermediate beams between several beams case monolithically with the slab
Answer.
- 1
  
  act as I-beams
- 2
  
  act as T-beams
- 3
  
  act as L-beams
- 4
  
  act as rectangular beams
Answer: 2

Explanation:
10) Question.

At continuous supports, the lower portion of
Answer.
- 1
  
  the slab is in tension
- 2
  
  the slab is in compression
- 3
  
  the slab experiences neither the tension nor compression
- 4
  
  none of these
Answer: 2

Explanation:
11) Question.

The slab forming the top part of flanged the beam mix span in subject to compression over a length a
Answer.
- 1
  
  greater than the width of the rib
- 2
  
  equal to the width of the rib
- 3
  
  less than the width of the rib
- 4
  
  equal to the perimeter of effective rectangular of the secion
Answer: 1

Explanation:
12) Question.

In doubly reinforced beams, the percentage of the maximum compession reinforcement of the gross cross-sectional area of beam should not exceed:
Answer.
- 1
  
  2%
- 2
  
  3%
- 3
  
  4%
- 4
  
  5%
Answer: 3

Explanation:
13) Question.

The strain at the level of compression reinforcement is doubly reinforced beam is:

where d' is the effective cover in compression reinforcement and $X_{m}$ is the maximum depth of the neutral axis.
Answer.
- 1
  
  $0.0035 (1 - \frac{d'}{X_{m}})$
- 2
  
  $0.0035 (1 + \frac{d'}{X_{m}})$
- 3
  
  $0.087 (1 - \frac{d'}{X_{m}})$
- 4
  
  $0.087 (1 + \frac{d'}{X_{m}})$
Answer: 1

Explanation:
14) Question.

The design of a doubly reinforcement beam section involves the determination of:
Answer.
- 1
  
  breadth of no section
- 2
  
  depth of the section
- 3
  
  area of tension reinforcement
- 4
  
  none of these
Answer: 4

Explanation:
15) Question.

In doubly reinforced beam, tension reinforcement is designed for a stress of $0.87 σ_{ψ}$ and in compression reinforcedment the stress is taken;
Answer.
- 1
  
  equal to that of tension reinforcement
- 2
  
  greater than the tension reinforcement
- 3
  
  lower than the tension reinforcement
- 4
  
  double the tension reinforcement
Answer: 3

Explanation:
16) Question.

For a rectangular simply supported beam for 4.5 m effective span, based on the code restriction, the depth is:
Answer.
- 1
  
  180 mm
- 2
  
  225 mm
- 3
  
  300 mm
- 4
  
  none of these
Answer: 2

Explanation:
17) Question.

The ensure that under the applied moment the concrete and steel in singly reinforced beam reach their stresses, the minimum area of steel

where bd is the effective compression area and $σ_{ψ}$ is the characteristic
Answer.
- 1
  
  $0.42 \frac{b d}{σ_{y}}$
- 2
  
  $0.36 \frac{b d}{σ_{y}}$
- 3
  
  $0.85 \frac{b d}{σ_{y}}$
- 4
  
  $0.87 \frac{b d}{σ_{y}}$
Answer: 3

Explanation:
18) Question.

The dowel force is the shear force
Answer.
- 1
  
  across the steel bars
- 2
  
  across the neutral axis
- 3
  
  at the top of the beam
- 4
  
  at the bottom of the beam
Answer: 1

Explanation:
19) Question.

The aspect ratio is defined as the ratio of
Answer.
- 1
  
  length to breadth of a state
- 2
  
  effective width of flange and effective depth of the beam
- 3
  
  width of well and depth of flange
- 4
  
  none of these
Answer: 1

Explanation:
20) Question.

The most economical design of singly reinforced beams is given by:
Answer.
- 1
  
  Limit state theory
- 2
  
  Working stress theory
- 3
  
  ultimate stress theory
- 4
  
  All of these
Answer: 1

Explanation:

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