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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
Increase in the moisture content in concrete

increases the strength
All of these
reduces the strength
does not change the strength

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Concrete Technology and Design of Concrete Structures
The property of fresh concrete, in which the water in the mix tends to rise to the surface while placing and compacting, is called

creep
bulking
segregation
bleeding

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Concrete Technology and Design of Concrete Structures
Cube strength of controlled concrete to be used for pretensioned and post-tensioned work respectively should not be less than

42 MPa and 35 MPa
53 MPa and 42 MPa
42 MPa and 53 MPa
35 MPa and 42 MPa

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

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

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Concrete Technology and Design of Concrete Structures
The minimum cover in a slab should neither be less than the diameter of bar nor less than

15 mm
10 mm
30 mm
20 mm

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