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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
Ratio of permissible stress in direct compression and bending compression is

less than 1
greater than 2
between 1.5 and 2.0
between 1 and 1.5

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Concrete Technology and Design of Concrete Structures
The centroid of compressive force, from the extreme compression fiber, in limit state design lies at a distance of (where xu is the depth of neutral axis at the limit state of collapse)

0.416 xu
0.573 xu
0.367 xu
0.446 xu

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Concrete Technology and Design of Concrete Structures
For a longitudinal reinforcing bar in a column, the minimum cover shall neither be less than the diameter of bar nor less than

45mm
40 mm
60 mm
50 mm

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Concrete Technology and Design of Concrete Structures
Shrinkage of concrete depends upon i) humidity of atmosphere ii) passage of time iii) stress The correct answer is

All (i), (ii) and (iii)
only (iii)
(ii) and (iii)
(i) and (ii)

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Concrete Technology and Design of Concrete Structures
The design yield stress of steel according to IS: 456-1978 is (where fy is the characteristic yield strength of steel)

0.37 fy
0.87 fy
0.57 fy
0.67 fy

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Concrete Technology and Design of Concrete Structures
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

can be more than 1
is always less than 1
can be less than 1
is always greater than 1

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