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Concrete Technology and Design of Concrete Structures

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

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

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Concrete Technology and Design of Concrete Structures
The property of fresh concrete, in which the water in the mix tends to rise to the surface while placing and compacting, is called

segregation
bleeding
creep
bulking

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Concrete Technology and Design of Concrete Structures
The property of the ingredients to separate from each other while placing the concrete is called

segregation
bulking
compaction
shrinkage

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Concrete Technology and Design of Concrete Structures
For walls, columns and vertical faces of all structural members, the form work is generally removed after

14 days
7 days
3 days
24 to 48 hours

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

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Concrete Technology and Design of Concrete Structures
In symmetrically reinforced sections, shrinkage stresses in concrete and steel are respectively

tensile and compressive
both compressive
both tensile
compressive and tensile

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