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Concrete Technology and Design of Concrete Structures

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
20 kN/cm²
2xl06N/cm²

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Concrete Technology and Design of Concrete Structures
In order to obtain the best workability of concrete, the preferred shape of aggregate is

angular
All of these
rounded
elongated

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Concrete Technology and Design of Concrete Structures
According to IS : 456- 1978, minimum slenderness ratio for a short column is

less than 12
between 18 and 24
less than 18
more than 24

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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 x500 mm
100 x100 x700 mm
150 x150 x700 mm

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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 / 4d
wR/2d
wR/d
2wR/d

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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

1.5
3
2.5
2

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