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.Management Sciences
Category: Design of Concrete Structures
The fineness modulus of fine aggregate is in the range of______________?
0
A. 2.0 to 3.5
B. 3.5 to 5.0
C. 5.0 to 7.0
D. 6.0 to 8.5
Maximum quantity of water needed per 50 kg of cement for M 15 grade of concrete is_______________?
A. 28 liters
B. 30 liters
C. 32 liters
D. 34 liters
For a cantilever of effective depth of 0.5m, the maximum span to satisfy vertical deflection limit is______________?
A. 3.5 m
B. 4 m
C. 4.5 m
D. 5 m
The individual variation between test strength of sample should not be more than______________?
A. ±5% of average
B. ± 10% of average
C. ± 15% of average
D. ±20% of average
To determine the modulus of rupture, the size of test specimen used is_______________?
A. 150 x150 x500 mm
B. 100 x100 x700 mm
C. 150 x150 x700 mm
D. 100 x100 x500 mm
The design yield stress of steel according to IS: 456-1978 is_______________?
A. 0.37 fy
B. 0.57 fy
C. 0.67 fy
D. 0.87 fy
where fy is the characteristic yield strength of steel
Prestress loss due to friction occurs________________?
A. only in post-tensioned beams
B. only in pretensioned beams
C. in both post-tensioned and preten-sioned beams
D. none of the above
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
Air entrainment in the concrete increases________________?
A. workability
B. strength
C. the effects of temperature variations
D. the unit weight
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