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

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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

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

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Concrete Technology and Design of Concrete Structures
The purpose of reinforcement in pre-stressed concrete is

To provide adequate bond stress
All of these
To impart initial compressive stress in concrete
To resist tensile stresses

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Concrete Technology and Design of Concrete Structures
Most common method of prestressing used for factory production is

Lee-Macall system
Magnel-Blaton system
Long line method
Freyssinet system

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Concrete Technology and Design of Concrete Structures
Poisson’s ratio for concrete

increases with richer mixes
None of these
remains constant
decreases with richer mixes

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Concrete Technology and Design of Concrete Structures
The factor of safety for

steel is higher than that for concrete
steel is lower than that for concrete
None of these
steel and concrete are same

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