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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
Ratio of permissible stress in direct compression and bending compression is

greater than 2
between 1 and 1.5
between 1.5 and 2.0
less than 1

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

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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/d
wR / 4d

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Concrete Technology and Design of Concrete Structures
The recommended value of modular ratio for reinforced brick work is

40
99
35
88

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Concrete Technology and Design of Concrete Structures
The minimum cover in a slab should neither be less than the diameter of bar nor less than

20 mm
10 mm
15 mm
30 mm

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Concrete Technology and Design of Concrete Structures
Bulking of sand is maximum if moisture content is about

5%
6%
4%
7%

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