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Concrete Technology and Design of Concrete Structures

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

bleeding
segregation
creep
bulking

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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
35 MPa and 42 MPa
42 MPa and 53 MPa

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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

600 mm
750 mm
900 mm
more than 1 m

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Concrete Technology and Design of Concrete Structures
1% of voids in a concrete mix would reduce its strength by about

5%
20%
10 %
15%

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Concrete Technology and Design of Concrete Structures
In reinforced concrete footing on soil, the minimum thickness at edge should not be less than

250 mm
200 mm
100 mm
150 mm

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Concrete Technology and Design of Concrete Structures
To determine the modulus of rupture, the size of test specimen used is

100 x100 x700 mm
150 x150 x700 mm
150 x150 x500 mm
100 x100 x500 mm

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