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Concrete Technology and Design of Concrete Structures

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

50 mm
40 mm
60 mm
45mm

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

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

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Concrete Technology and Design of Concrete Structures
The minimum diameter of longitudinal bars in a column is

12 mm
6 mm
8 mm
16 mm

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Concrete Technology and Design of Concrete Structures
In a ring beam subjected to uniformly distributed load i) shear force at mid span is zero ii) shear force at mid span is maximum iii) torsion at mid span is zero iv) torsion at mid span is maximum The correct answer is

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

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Concrete Technology and Design of Concrete Structures
Ultimate strength of cold drawn high steel wires

increases with increase in diameter of bar
None of these
does not depend on diameter of bar
decreases with increase in diameter of bar

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Concrete Technology and Design of Concrete Structures
In a counterfort retaining wall, the main reinforcement is provided on the i) bottom face in front counterfort ii) inclined face in front counterfort iii) bottom face in back counterfort iv) inclined face in back counterEort The correct answer is

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

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