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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
According to ISI recommendations, the maximum depth of stress block for balanced section of a beam of effective depth d is

0.68 d
0.55 d
0.43 d
0.85 d

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Concrete Technology and Design of Concrete Structures
The percentage of voids in cement is approximately

60%
50%
40%
70%

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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
wR/d
wR / 4d
2wR/d

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Concrete Technology and Design of Concrete Structures
A T-shaped retaining wall mainly conssits of

one cantilever
three cantilevers
four cantilevers
two cantilevers

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Concrete Technology and Design of Concrete Structures
In symmetrically reinforced sections, shrinkage stresses in concrete and steel are respectively

tensile and compressive
both compressive
both tensile
compressive and tensile

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Concrete Technology and Design of Concrete Structures
To determine the modulus of rupture, the size of test specimen used is

150 x150 x500 mm
100 x100 x700 mm
100 x100 x500 mm
150 x150 x700 mm

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