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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
Strength of concrete increases with

increase in water-cement ratio
increase in fineness of cement
decrease in curing time
decrease in size of aggregate

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

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

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Concrete Technology and Design of Concrete Structures
The design yield stress of steel according to IS: 456-1978 is (where fy is the characteristic yield strength of steel)

0.87 fy
0.57 fy
0.37 fy
0.67 fy

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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

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

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Concrete Technology and Design of Concrete Structures
Shrinkage of concrete depends uponi) humidity of atmosphereii) passage of timeiii) stress The correct answer is

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

more than 1 m
750 mm
900 mm
600 mm

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