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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
Poisson’s ratio for concrete

decreases with richer mixes
None of these
remains constant
increases with richer mixes

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

5%
15%
10%
20%

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Concrete Technology and Design of Concrete Structures
Select the incorrect statement for ...

Lean mixes bleed more as compared to rich ones.
None of these
Bleeding can be minimized by adding pozzuolana finer aggregate.
Bleeding can be increased by addition of calcium chloride.

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

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

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

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Concrete Technology and Design of Concrete Structures
The ratio of the diameter of reinforcing bars and the slab thickness is

1/4
1/6
1/5
1/8

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