RCC Sheet 16

1) Question.

The footing at the base for a circular column may be
Answer.
- 1
  
  Trapezoidal
- 2
  
  square
- 3
  
  circle
- 4
  
  either (b) or (c)
Answer: 4

Explanation:
2) Question.

When there are some restrictions on the maximum value of the footing, a ...............footing should be provided even for a square column.
Answer.
- 1
  
  triangular
- 2
  
  trapezoidal
- 3
  
  rectangular
- 4
  
  circular
Answer: 3

Explanation:
3) Question.

For a square footing of width B, the depth of footing (D) considering punching shear, is calculated by the relation
Answer.
- 1
  
  $D = \frac{p_{0} (B^{2} - b^{2})}{2 b . τ_{p}}$
- 2
  
  $D = \frac{p_{0} (B^{2} - b^{2})}{4 b . τ_{p}}$
- 3
  
  $D = \frac{p_{0} (B^{2} - b^{2})}{8 b . τ_{p}}$
- 4
  
  $D = \frac{p_{0} (B^{2} - b^{2})}{16 b . τ_{p}}$
Answer: 2

Explanation:
Where $p_{0}$ = Net upward pressure on the footing

b = Width of column, and

$τ_{p}$ = Unit punching shear strength of concrete.
4) Question.

For M 15 concrete, unit punching shear strength of concrete is taken as
Answer.
- 1
  
  1 N/m $m^{2}$
- 2
  
  2 N/m $m^{2}$
- 3
  
  3 N/m $m^{2}$
- 4
  
  4 N/m $m^{2}$
Answer: 1

Explanation:
5) Question.

If the net upward pressure on a square footing is $p_{0}$ width of footing is B and width of column wall is b, than maximum bending moment (m) near the column is given by
Answer.
- 1
  
  $M = \frac{p_{0} B}{2} {(B - b)}^{2}$
- 2
  
  $M = \frac{p_{0} B}{4} {(B - b)}^{2}$
- 3
  
  $M = \frac{p_{0} B}{8} {(B - b)}^{2}$
- 4
  
  $M = \frac{p_{0} B}{16} {(B - b)}^{2}$
Answer: 3

Explanation:
6) Question.

The net upward pressure on footing ( $p_{0}$ ) is given by
Answer.
- 1
  
  $p_{0} = \frac{W + W'}{W x q_{0}}$
- 2
  
  $p_{0} = \frac{W x q_{0}}{W + W'}$
- 3
  
  $p_{0} = \frac{W - W'}{W x q_{0}}$
- 4
  
  $p_{0} = \frac{W x q_{0}}{W - W'}$
Answer: 2

Explanation:
Where W = Weight transferred from the column

W' = Weight of footing, and

$q_{0}$ = Safe bearing capacity of soil
7) Question.

The weight of footings is assumed as ...... of the weight transffered to the column
Answer.
- 1
  
  5%
- 2
  
  10%
- 3
  
  15%
- 4
  
  20%
Answer: 2

Explanation:
8) Question.

According to IS : 456- 1978, the thikness at the edge, in reinforced concrete footing shall not be less than ......... for footing on soils
Answer.
- 1
  
  100 mm
- 2
  
  150 mm
- 3
  
  250 mm
- 4
  
  350 mm
Answer: 2

Explanation:
9) Question.

For the purpose of the design of reinforced concrete footings, presure distribution is assumed to be
Answer.
- 1
  
  linear
- 2
  
  parabolic
- 3
  
  hyperbolic
- 4
  
  none of these
Answer: 1

Explanation:
10) Question.

When the footing is symmetrically loaded, the pressure beneath the footing will
Answer.
- 1
  
  be uniform
- 2
  
  not be uniform
- 3
  
  be zero in the centre
- 4
  
  be more at the edges
Answer: 2

Explanation:

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