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Concrete Technology and Design of Concrete Structures

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

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

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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
In symmetrically reinforced sections, shrinkage stresses in concrete and steel are respectively

compressive and tensile
both compressive
both tensile
tensile and compressive

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Concrete Technology and Design of Concrete Structures
For concreting of heavily reinforced sections without vibration, the workability of concrete expressed as compacting factor should be

0.85 - 0.92
0.75 - 0.80
0.75 - 0.80
Above 0.92

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

reduces workability
increases bleeding
increases strength
increases shrinkage

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Concrete Technology and Design of Concrete Structures
According to IS: 456-1978, the maximum reinforcement in a column is

6 %
8 %
4%
2 %

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