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31.

For a continuous slab of 3 m x 3.5 m size, the minimum overall depth of slab to satisfy vertical deflection limits is                        


A. 50 mm B. 75 mm
C. 100 mm D. 120 mm




32.

For a longitudinal reinforcing bar in a column, the minimum cover shall neither be less than the diameter of bar nor less than                        


A. 15 mm B. 25 mm
C. 30mm D. 40 mm




33.

For a reinforced concrete section, the shape of shear stress diagram is                        


A. wholly parabolic B. wholly rectangular
C. parabolic above neutral axis and rectangular below neutral axis D. rectangular above neutral axis and parabolic below neutral axis




34.

For a simply supported beam of span 15m, the minimum effective depth to satisfy the vertical deflection limits should be                        


A. 600 mm B. 750 mm
C. 900 mm D. more than 1 m




35.

For a slab supported on its four edges with corners held down and loaded uniformly, the Marcus correction factor to the moments obtained by Grashoff Rankine's theory                        


A. is always less than 1 B. is always greater than 1
C. can be more than 1 D. can be less than 1




36.

For concreting of heavily reinforced sections without vibration, the workability of concrete expressed as compacting factor should be                        


A. 0.75-0.80 B. 0.80-0.85
C. 0.85 - 0.92 D. above 0.92




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