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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

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

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

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

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Concrete Technology and Design of Concrete Structures
As compared to ordinary portland cement, use of pozzuolanic cement

increases strength
increases bleeding
increases shrinkage
reduces workability

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Concrete Technology and Design of Concrete Structures
1% of voids in a concrete mix would reduce its strength by about

10 %
5%
15%
20%

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Concrete Technology and Design of Concrete Structures
The slab is designed as one way if the ratio of long span to short span is

between 1 and 1.5
greater than 2
between 1.5 and 2
less than 1

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Concrete Technology and Design of Concrete Structures
According to IS : 456- 1978, minimum slenderness ratio for a short column is

between 18 and 24
less than 12
less than 18
more than 24

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