113. 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

A. B.M. - pb(c- a)

B. B.M. - pb(b - a)2

C.pb (b - a)2

D. B.M. pb(b + a)

114. 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 consideration, is

A. 30?

B. 45?

C. 60?

D. none of these

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

A. 4 mm

B. 5 mm

C. 6 mm

D. 8 mm

116. If the width of the foundation for two equal columns is restricted, the shape of the footing generally adopted, is

A. square

B. rectangular

C. trapezoidal

D. triangular

117. Based on punching shear consideration, the overall depth of a combined footing under a column A, is

A. Area of the column Ax Safe punching stress Load on column A

B. Perimeter of column A x Safe punching stress Load on column A + Upward pressure x Area of column

C. Perimeter of column Ax Safe punching stress Load on columnA + Upward pressure x Area of column

D. None of these.

118. In a combined footing for two columns carrying unequal loads, the maximum hogging bending moment occurs at

A. less loaded column

B. more loaded column

C. a point-equidistant from either column

D. a point of zero shear force.

119. In a combined footing if shear stress does not exceed 5 kg/cm2, the nominal stirrups provided are

A. 6 legged

B. 8 legged

C. 10 legged

D. 12 legged

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