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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
The purpose of reinforcement in pre-stressed concrete is

To resist tensile stresses
To provide adequate bond stress
To impart initial compressive stress in concrete
All of these

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Concrete Technology and Design of Concrete Structures
Increase in the moisture content in concrete

increases the strength
reduces the strength
does not change the strength
All of these

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

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

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Concrete Technology and Design of Concrete Structures
The recommended value of modular ratio for reinforced brick work is

99
35
88
40

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Concrete Technology and Design of Concrete Structures
To minimize the effect of differential settlement, the area of a footing should be designed for

Live load + fraction of dead load
Dead load + fraction of live load
Dead load only
Dead load + live load

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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

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

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