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Concrete Technology and Design of Concrete Structures

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

50%
40%
60%
70%

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Concrete Technology and Design of Concrete Structures
The property of fresh concrete, in which the water in the mix tends to rise to the surface while placing and compacting, is called

segregation
bleeding
bulking
creep

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Concrete Technology and Design of Concrete Structures
The depth of footing for an isolated column is governed by i) maximum bending moment ii) shear force iii) punching shear The correct answer is

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

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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

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

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Concrete Technology and Design of Concrete Structures
The permissible diagonal tensile stress in reinforced brick work is

about 1.0 N/mm²
about 0.1 N/mm²
zero
0.3 N/mm² to 0.7 N/mm²

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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
compressive and tensile
both compressive
both tensile

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