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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
Workability of concrete is inversely proportional to

vater-cement ratio
size of aggregate
the air in the mix
time of transit

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Concrete Technology and Design of Concrete Structures
Minimum thickness of load bearing RCC wall should be

40 mm
100 mm
50 mm
105 mm

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Concrete Technology and Design of Concrete Structures
In T-shaped R C. retaining walls, the main reinforcement in the stem is provided on

the front face in both directions
the front face in one direction
the inner face in one direction
the inner face in both directions

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Concrete Technology and Design of Concrete Structures
Diagonal tension in a beam

Remains same
Increases below the neutral axis and decreases above the neutral axis
Decreases below the neutral axis and increases above the neutral axis
Is maximum at neutral axis

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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
retarders
accelerators

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Concrete Technology and Design of Concrete Structures
Cube strength of controlled concrete to be used for pretensioned and post-tensioned work respectively should not be less than

53 MPa and 42 MPa
42 MPa and 53 MPa
35 MPa and 42 MPa
42 MPa and 35 MPa

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