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Concrete Technology and Design of Concrete Structures

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

0.6%
0.4%
0.5%
0.3%

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Concrete Technology and Design of Concrete Structures
According to IS: 456-1978, the column or the strut is the member whose effective length is greater than

3 times the least lateral dimension
4 times the least lateral dimension
The least lateral dimension
2 times the least lateral dimension

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Concrete Technology and Design of Concrete Structures
Sinking of an intermediate support of a continuous beam i) reduces the negative moment at support ii) increases the negative moment at support iii) reduces the positive moment at center of span iv) increases the positive moment at center of span The correct answer is

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

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Concrete Technology and Design of Concrete Structures
When shear stress exceeds the permissible limit in a slab, then it is reduced by

Increasing the depth
Using thinner bars but more in number
Using high strength steel
Providing shear reinforcement

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Concrete Technology and Design of Concrete Structures
In the design of a front counterfort in a counterfort retaining wall, the main reinforcement is provided on
i) bottom face near counterfort
ii) top face near counterfort
iii) bottom face near centre of span
iv) top face near centre of span
The correct answer is

only (i)
both (i) and (iv)
only (ii)
both (ii) and (iii)

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Concrete Technology and Design of Concrete Structures
The fineness modulus of fine aggregate is in the range of

5.0 to 7.0
2.0 to 3.5
6.0 to 8.5
3.5 to 5.0

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