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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
A higher modular ratio shows

higher compressive strength of con-crete
lower tensile strength of steel
higher tensile strength of steel
lower compressive strength of concrete

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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

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

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

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

0.4%
0.6%
0.3%
0.5%

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Concrete Technology and Design of Concrete Structures
Prestress loss due to friction occurs

in both post-tensioned and preten-sioned beams
only in post-tensioned beams
only in pretensioned beams
None of these

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Concrete Technology and Design of Concrete Structures
In a ring beam subjected to uniformly distributed loadi) shear force at mid span is zeroii) shear force at mid span is maximumiii) torsion at mid span is zeroiv) torsion at mid span is maximum The correct answer is

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

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