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Concrete Technology and Design of Concrete Structures

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

100 mm
150 mm
200 mm
250 mm

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Concrete Technology and Design of Concrete Structures
Maximum quantity of water needed per 50 kg of cement for M 15 grade of concrete is

32 liters
34 liters
30 liters
28 liters

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

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Concrete Technology and Design of Concrete Structures
For walls, columns and vertical faces of all structural members, the form work is generally removed after

7 days
24 to 48 hours
3 days
14 days

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Concrete Technology and Design of Concrete Structures
Workability of concrete is directly proportional to

All of above
Time of transit
Grading of the aggregate
Aggregate cement ratio

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Concrete Technology and Design of Concrete Structures
Sinking of an intermediate support of a continuous beami) reduces the negative moment at supportii) increases the negative moment at supportiii) reduces the positive moment at center of spaniv) increases the positive moment at center of span The correct answer is

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

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