RCC Sheet 38

1) Question.

In a combined footing if shear stress exceeds $5 k g / c m^{2}$ , the nominal stirrrups provided are
Answer.
- 1
  
  6 legged8 legged
- 2
  
  8 legged
- 3
  
  12 legged
- 4
  
  10 legged
Answer: 3

Explanation:
2) Question.

In a combined footing if shear stress does not exceed $5 k g / c m^{2}$ , the nominal stirrups provided are
Answer.
- 1
  
  6 legged
- 2
  
  8 legged
- 3
  
  10 legged
- 4
  
  12 legged
Answer: 2

Explanation:
3) Question.

In a combined footing for two columns carrying unequal loads, the maximum hogging bending moment occurs at
Answer.
- 1
  
  less loaded column
- 2
  
  more loaded column
- 3
  
  a point equidistant from either column
- 4
  
  a point of zero shear force
Answer: 4

Explanation:
4) Question.

Based on punching shear consideration, the overall depth of a combined footing sunder a column A, is
Answer.
- 1
  
  $\frac{A r e a o f t h e c o l u m n A x S a f e p u n c h i n g s t r e s s}{L o a d o n c o l u m n A}$
- 2
  
  $\frac{P e r i m e t e r o f c o l u m n A x S a f e p u n c h i n g s t r e s s}{L o a d o n c o l u m n A + U p w a r d p r e s s u r e x A r e a o f c o l u m n}$
- 3
  
  $\frac{P e r i m e t e r o f c o l u m n A x S a f e p u n c h i n g s t r e s s}{L o a d o n c o l u m n A + U p w a r d p r e s s u r e x A r e a o f c o l u m n}$
- 4
  
  None of these
Answer: 2

Explanation:
5) Question.

If the length of a combined footing for two columns l metres is L and the projection on the left side of the exterior column is x, then the projection y on the right side of the exterior column, in order to have a uniformly distributed load, is

where $\bar{x}$ is the distance of centre of gravity of column loads.
Answer.
- 1
  
  $y = L - (l - \bar{x})$
- 2
  
  $y = \frac{L}{2} + (l - \bar{x})$
- 3
  
  $y = \frac{L}{2} - (l + \bar{x})$
- 4
  
  $y = \frac{L}{2} - (l - \bar{x})$
Answer: 4

Explanation:
6) Question.

If the width of the foundation for two equal columns is restricted, the shape of the footing generally adopted, is
Answer.
- 1
  
  square
- 2
  
  rectangular
- 3
  
  trapezoidal
- 4
  
  triangular
Answer: 2

Explanation:
7) Question.

If the diameter of longitudinal bars of a square column is 16 mm, the diameter of lateral ties should not be less than
Answer.
- 1
  
  4 mm
- 2
  
  5 mm
- 3
  
  6 mm
- 4
  
  8 mm
Answer: 2

Explanation:
8) Question.

If q is the punching shear resistance per unit area a, is the side of a square footing for a column of side b, carrying a weight W including the weight of the footing, the depth (D) of the footing from punching shear considereation, is
Answer.
- 1
  
  $D = \frac{W (a - b)}{4 a^{2} b q}$
- 2
  
  $D = \frac{W (a^{2} - b^{2})}{4 a^{2} b q}$
- 3
  
  $D = \frac{W (a^{2} - b^{2})}{8 a^{2} b q}$
- 4
  
  $D = \frac{W (a^{2} - b^{2})}{4 a b q}$
Answer: 2

Explanation:
9) Question.

If p is the net upward pressure on a square footing of side b for a square column of side a, the maximum bending moment is given by
Answer.
- 1
  
  $B . M . = \frac{p b (c - a)}{4}$
- 2
  
  $B . M . = \frac{p b {(b - a)}^{2}}{4}$
- 3
  
  $B . M . = \frac{p b {(b - a)}^{2}}{8}$
- 4
  
  $B . M . = \frac{p b (b + a)}{8}$
Answer: 1

Explanation:
10) Question.

The self-weight of the fooitng, is
Answer.
- 1
  
  not considered for calculating the upward pressure on footing
- 2
  
  also considered for calculating the upward pressure on footing
- 3
  
  not considered for calculating the area of the footing
- 4
  
  both (b) and (c)
Answer: 1

Explanation:

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