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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
Poisson’s ratio for concrete

None of these
decreases with richer mixes
increases with richer mixes
remains constant

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Concrete Technology and Design of Concrete Structures
Most common method of prestressing used for factory production is

Magnel-Blaton system
Long line method
Lee-Macall system
Freyssinet system

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Concrete Technology and Design of Concrete Structures
Bulking of sand is maximum if moisture content is about

7%
5%
4%
6%

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Concrete Technology and Design of Concrete Structures
The depth of footing for an isolated column is governed by i) maximum bending moment ii) shear force iii) punching shear The correct answer is

(i), (ii) and (iii)
only (i)
(i) and (ii)
(i) and (iii)

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Concrete Technology and Design of Concrete Structures
For a simply supported beam of span 15m, the minimum effective depth to satisfy the vertical deflection limits should be

750 mm
more than 1 m
600 mm
900 mm

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Concrete Technology and Design of Concrete Structures
According to IS: 456-1978, the column or the strut is the member whose effective length is greater than

4 times the least lateral dimension
The least lateral dimension
2 times the least lateral dimension
3 times the least lateral dimension

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