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Concrete Technology and Design of Concrete Structures

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
2wR/d
wR / 4d

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Concrete Technology and Design of Concrete Structures
The minimum cover to the ties or spirals should not be less than

25 mm
50mm
15 mm
20 mm

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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

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

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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

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

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Concrete Technology and Design of Concrete Structures
Which of the following R.C. retaining walls is suitable for heights beyond 6m?

counterfort type
T-shaped wall
All of these
L-shaped wall

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Concrete Technology and Design of Concrete Structures
The approximate value of the ratio between direct tensile strength and flexural strength is

0.5
1
0.75
0.33

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