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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
Air entrainment in the concrete increases

strength
the effects of temperature variations
the unit weight
workability

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Concrete Technology and Design of Concrete Structures
In a spherical dome the hoop stress due to a concentrated load at crown is

zero
compressive everywhere
partly compressive and partly tensile
tensile everywhere

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

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Concrete Technology and Design of Concrete Structures
Shrinkage of concrete depends uponi) humidity of atmosphereii) passage of timeiii) stressThe correct answer is

(ii) and (iii)
All (i), (ii) and (iii)
only (iii)
(i) and (ii)

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Concrete Technology and Design of Concrete Structures
To minimize the effect of differential settlement, the area of a footing should be designed for

Dead load + fraction of live load
Dead load + live load
Live load + fraction of dead load
Dead load only

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Concrete Technology and Design of Concrete Structures
The minimum diameter of longitudinal bars in a column is

12 mm
6 mm
8 mm
16 mm

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