85. The minimum thickness of a flat slab is taken

A. 13 cm

B. 1132 for end panels without drops

C. 1136 for end panels without drops

D. all the above.

86. The effective width of a column strip of a flat slab, is

A. one-fourth the width of the panel

B. half the width of the panel

C. radius of the column

D. diameter of the column

87. If W is total load per unit area on a panel, D is the diameter of the column head, L is the span in two directions,then the sum of the maximum positive bending moment and average of the negative bending moment for the design of the span of a square flat slab, should not be less than

A.

B.

C.

D.

88. A circular slab subjected to external loading, deflects to form a

A. semi-hemisphere

B. ellipsoid

C. parabolloid

D. none of these.

89. For a circular slab carrying a uniformly distributed load, the ratio of the maxi-mum negative to maximum positive radial moment, is

A.1

B.2

C.3

D.4

90. For normal cases, stiffness of a simply supported beam is satisfied if the ratio of its span to its overall depth does not exceed

A.10

B.15

C.20

D.25

91. If the ratio of the span to the overall depth does not exceed 10, the stiffness of the beam will ordinarily be satisfactory in case of a

A. simply supported beam

B. continuous beam

C. cantilever beam

D. none of these.

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