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Concrete Technology and Design of Concrete Structures

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

size of aggregate
vater-cement ratio
the air in the mix
time of transit

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Concrete Technology and Design of Concrete Structures
According to Whitney’s theory, ultimate strain of concrete is assumed to be

0.3%
0.6%
0.5%
0.4%

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Concrete Technology and Design of Concrete Structures
In counterfort retaining walls, the main reinforcement in the stem at support is

Provided both on inner and front faces
Not provided
Provided only on front face
Provided only on inner face

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Concrete Technology and Design of Concrete Structures
The permissible diagonal tensile stress in reinforced brick work is

0.3 N/mm² to 0.7 N/mm²
about 1.0 N/mm²
about 0.1 N/mm²
zero

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Concrete Technology and Design of Concrete Structures
Maximum distance between expansion joints in structures as per IS : 456 – 1978 is

60 m
20 m
30 m
45 m

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

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