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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
In case of hand mixing of concrete, the extra cement to be added is

10%
20%
15%
5%

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Concrete Technology and Design of Concrete Structures
The purpose of reinforcement in pre-stressed concrete is

To provide adequate bond stress
All of these
To resist tensile stresses
To impart initial compressive stress in concrete

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Concrete Technology and Design of Concrete Structures
For a longitudinal reinforcing bar in a column, the minimum cover shall neither be less than the diameter of bar nor less than

45mm
40 mm
60 mm
50 mm

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Concrete Technology and Design of Concrete Structures
The load factors for live load and dead load are taken respectively as

2.2 and 1.5
2.2 and 2.2
1.5 and 1.5
1.5 and 2.2

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Concrete Technology and Design of Concrete Structures
For a cantilever of effective depth of 0.5m, the maximum span to satisfy vertical deflection limit is

3.5 m
5 m
4 m
6 m

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Concrete Technology and Design of Concrete Structures
Modulus of elasticity of steel as per IS : 456-1978 shall be taken as

200 kN/cm²
200kN/mm²
2xl06N/cm²
20 kN/cm²

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