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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
In order to obtain the best workability of concrete, the preferred shape of aggregate is

rounded
All of these
elongated
angular

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Concrete Technology and Design of Concrete Structures
For concreting of heavily reinforced sections without vibration, the workability of concrete expressed as compacting factor should be

0.85 - 0.92
0.75 - 0.80
0.75 - 0.80
Above 0.92

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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

50 mm
60 mm
45mm
40 mm

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Concrete Technology and Design of Concrete Structures
The limits of percentage p of the longitudinal reinforce-ment in a column is given by

0.8% to 8%
0.8% to 4%
0.8% to 6%
0.15% to 2%

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Concrete Technology and Design of Concrete Structures
In the design of a front counterfort in a counterfort retaining wall, the main reinforcement is provided on
i) bottom face near counterfort
ii) top face near counterfort
iii) bottom face near centre of span
iv) top face near centre of span
The correct answer is

both (i) and (iv)
both (ii) and (iii)
only (ii)
only (i)

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Concrete Technology and Design of Concrete Structures
The effect of adding calcium chloride in concrete is i) to increase shrinkage ii) to decrease shrinkage iii) to increase setting time iv) to decrease setting time The correct answer is

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

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