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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
When shear stress exceeds the permissible limit in a slab, then it is reduced by

Providing shear reinforcement
Using high strength steel
Using thinner bars but more in number
Increasing the depth

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

900 mm
600 mm
750 mm
more than 1 m

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Concrete Technology and Design of Concrete Structures
In a counterfort retaining wall, the main reinforcement is provided on the i) bottom face in front counterfort ii) inclined face in front counterfort iii) bottom face in back counterfort iv) inclined face in back counterEort The correct answer is

(i) and (ii),
(iii) and (iv)
(i) and (iv)
(ii) and (iii)

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Concrete Technology and Design of Concrete Structures
Due to shrinkage stresses, a simply supported beam having reinforcement only at bottom tends to

Deflect upward
Deflect downward or upward
Deflect downward
None of these

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Concrete Technology and Design of Concrete Structures
According to IS: 456-1978, the column or the strut is the member whose effective length is greater than

The least lateral dimension
2 times the least lateral dimension
4 times the least lateral dimension
3 times the least lateral dimension

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Concrete Technology and Design of Concrete Structures
If the permissible stress in steel in tension is 140 N/mm², then the depth of neutral axis for a singly reinforced rectangular balanced section will be

0.45 d
0.40 d
dependent on grade of concrete also
0.35 d

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