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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
Which of the following has high tensile strength ?

cold drawn wires
heat treated rolled wires
plain hot rolled wires
all have same tensile strength

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Concrete Technology and Design of Concrete Structures
The load carrying capacity of a helically reinforced column as compared to that of a tied column is about

10% less
5% less
10% more
5% more

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Concrete Technology and Design of Concrete Structures
For a longitudinal reinforcing bar in a column, the minimum cover shall neither be less than the diameter of bar nor less than

60 mm
50 mm
40 mm
45mm

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Concrete Technology and Design of Concrete Structures
In order to obtain the best workability of concrete, the preferred shape of aggregate is

rounded
All of these
angular
elongated

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Concrete Technology and Design of Concrete Structures
The relation between modulus of rupture fcr, splitting strength fcs and direct tensile strength fcl is given by

fcr
tcr – rcs = tct
fcr>fcs>fc.
fc5>fcr>fC

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

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