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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
When shear stress exceeds the permissible limit in a slab, then it is reduced by

Using high strength steel
Using thinner bars but more in number
Increasing the depth
Providing shear reinforcement

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Concrete Technology and Design of Concrete Structures
For the design of retaining walls, the minimum factor of safety against overturning is taken as

2
2.5
3
1.5

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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
Diagonal tension in a beam

Is maximum at neutral axis
Remains same
Increases below the neutral axis and decreases above the neutral axis
Decreases below the neutral axis and increases above the neutral axis

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Concrete Technology and Design of Concrete Structures
The main reason for providing number of reinforcing bars at a support in a simply supported beam is to resist in that zone

shear stress
bond stress
tensile stress
compressive stress

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Concrete Technology and Design of Concrete Structures
The effect of adding calcium chloride in concrete isi) to increase shrinkageii) to decrease shrinkageiii) to increase setting timeiv) to decrease setting timeThe correct answer is

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

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