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Concrete Technology and Design of Concrete Structures

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

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

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

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Concrete Technology and Design of Concrete Structures
The fineness modulus of fine aggregate is in the range of

3.5 to 5.0
6.0 to 8.5
5.0 to 7.0
2.0 to 3.5

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Concrete Technology and Design of Concrete Structures
Select the incorrect statement for ...

None of these
Bleeding can be minimized by adding pozzuolana finer aggregate.
Bleeding can be increased by addition of calcium chloride.
Lean mixes bleed more as compared to rich ones.

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Concrete Technology and Design of Concrete Structures
Which of the following R.C. retaining walls is suitable for heights beyond 6m?

L-shaped wall
All of these
counterfort type
T-shaped wall

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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

24 to 48 hours
3 days
14 days
7 days

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