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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
The load carrying capacity of a helically reinforced column as compared to that of a tied column is about

5% more
10% more
10% less
5% less

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Concrete Technology and Design of Concrete Structures
The ratio of the diameter of reinforcing bars and the slab thickness is

1/5
1/4
1/8
1/6

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

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

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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

3 days
7 days
14 days
24 to 48 hours

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Concrete Technology and Design of Concrete Structures
Admixtures which cause early setting, and hardening of concrete are called

air entraining agents
workability admixtures
accelerators
retarders

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Concrete Technology and Design of Concrete Structures
In a spherical dome the hoop stress due to a concentrated load at crown is

zero
partly compressive and partly tensile
tensile everywhere
compressive everywhere

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