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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
In case of hand mixing of concrete, the extra cement to be added is

10%
15%
5%
20%

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Concrete Technology and Design of Concrete Structures
If the depth of actual neutral axis in a beam is more than the depth of critical neutral axis, then the beam is called

balanced beam
under-reinforced beam
over-reinforced beam
None of these

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Concrete Technology and Design of Concrete Structures
The purpose of reinforcement in pre-stressed concrete is

To impart initial compressive stress in concrete
To resist tensile stresses
All of these
To provide adequate bond stress

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Concrete Technology and Design of Concrete Structures
Maximum percentage reinforcement in case of slabs is limited to

4
8
2
9

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Concrete Technology and Design of Concrete Structures
The effect of adding calcium chloride in concrete isi) to increase shrinkageii) to decrease shrinkageiii) to increase setting timeiv) to decrease setting timeThe correct answer is

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

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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

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

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