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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
Shrinkage of concrete depends upon i) humidity of atmosphere ii) passage of time iii) stress The correct answer is

(i) and (ii)
only (iii)
(ii) and (iii)
All (i), (ii) and (iii)

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Concrete Technology and Design of Concrete Structures
Which of the following losses of prestress occurs only in pretensioning and not in post-tensioning ?

creep of concrete
elastic shortening of concrete
loss due to friction
shrinkage of concrete

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Concrete Technology and Design of Concrete Structures
The slab is designed as one way if the ratio of long span to short span is

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

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

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

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

rounded
elongated
All of these
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

0.75 - 0.80
Above 0.92
0.85 - 0.92
0.75 - 0.80

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