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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
The minimum cover to the ties or spirals should not be less than

20 mm
15 mm
50mm
25 mm

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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

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

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

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

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Concrete Technology and Design of Concrete Structures
In the design of a front counterfort in a counterfort retaining wall, the main reinforcement is provided on i) bottom face near counterfort ii) top face near counterfort iii) bottom face near centre of span iv) top face near centre of span The correct answer is

only (ii)
both (i) and (iv)
only (i)
both (ii) and (iii)

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Concrete Technology and Design of Concrete Structures
Approximate value of shrinkage strain in concrete, is

3.0E-5
0.0003
0.003
0.03

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Concrete Technology and Design of Concrete Structures
If the permissible stress in steel in tension is 140 N/mm², then the depth of neutral axis for a singly reinforced rectangular balanced section will be

0.45 d
0.35 d
0.40 d
dependent on grade of concrete also

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