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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
Maximum distance between expansion joints in structures as per IS : 456 – 1978 is

60 m
45 m
20 m
30 m

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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 approximate value of the ratio between direct tensile strength and flexural strength is

0.75
0.33
0.5
1

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Concrete Technology and Design of Concrete Structures
The percentage of voids in cement is approximately

70%
60%
50%
40%

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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

shrinkage
bulking
compaction
segregation

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Concrete Technology and Design of Concrete Structures
A higher modular ratio shows

lower tensile strength of steel
higher compressive strength of con-crete
lower compressive strength of concrete
higher tensile strength of steel

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