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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
Normally prestressing wires are arranged in the

anywhere
center
upper part of the beam
lower part of the beam

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Concrete Technology and Design of Concrete Structures
Admixtures which cause early setting, and hardening of concrete are called

air entraining agents
accelerators
retarders
workability admixtures

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Concrete Technology and Design of Concrete Structures
For a continuous slab of 3 m x 3.5 m size, the minimum overall depth of slab to satisfy vertical deflection limits is

120 mm
50 mm
75 mm
100 mm

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

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

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Concrete Technology and Design of Concrete Structures
The main reinforcement in the heel of a T-shaped R.C. retaining wall is provided on

both top and bottom faces perpendicular to wall
top face perpendicular to wall
bottom face perpendicular to wall
None of these

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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

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

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