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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

20%
5%
15%
10%

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Concrete Technology and Design of Concrete Structures
1% of voids in a concrete mix would reduce its strength by about

5%
15%
20%
10 %

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Concrete Technology and Design of Concrete Structures
If the size of panel in a flat slab is 6m x 6m, then as per Indian Standard Code, the widths of column strip and middle strip are

1.5 m and 1.5 m
1.5 m and 3.0 m
3.0 m and 3.0 m
3.0 m and 1.5 m

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Concrete Technology and Design of Concrete Structures
The maximum value of hoop compression in a dome is given by (where, w = load per unit area of surface of dome R = radius of curvature d = thickness of dome)

wR/2d
2wR/d
wR / 4d
wR/d

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Concrete Technology and Design of Concrete Structures
The load carrying capacity of a helically reinforced column as compared to that of a tied column is about

5% more
5% less
10% less
10% more

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Concrete Technology and Design of Concrete Structures
Diagonal tension in a beam

Remains same
Decreases below the neutral axis and increases above the neutral axis
Increases below the neutral axis and decreases above the neutral axis
Is maximum at neutral axis

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