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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
According to ISI recommendations, the maximum depth of stress block for balanced section of a beam of effective depth d is

0.85 d
0.43 d
0.55 d
0.68 d

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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

bulking
bleeding
creep
segregation

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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

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

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Concrete Technology and Design of Concrete Structures
The average permissible stress in bond for plain bars in tension is

decreased by 25% for bars in compression
increased by 10% for bars in compression
increased by 25% for bars in compression
decreased by 10% for bars in compression

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Concrete Technology and Design of Concrete Structures
The percentage of voids in cement is approximately

40%
60%
70%
50%

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Concrete Technology and Design of Concrete Structures
Critical section for shear in case of flat slabs is at a distance of

at the periphery of column
effective depth of slab from periphery of column/drop panel
d/2 from periphery of column/capital/ drop panel
at the drop panel of slab

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