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Concrete Technology and Design of Concrete Structures

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

accelerators
workability admixtures
air entraining agents
retarders

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Concrete Technology and Design of Concrete Structures
To determine the modulus of rupture, the size of test specimen used is

100 x100 x700 mm
100 x100 x500 mm
150 x150 x700 mm
150 x150 x500 mm

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Concrete Technology and Design of Concrete Structures
In a ring beam subjected to uniformly distributed load i) shear force at mid span is zero ii) shear force at mid span is maximum iii) torsion at mid span is zero iv) torsion at mid span is maximum The correct answer is

(i) and (iv)
(ii) and (iii)
(ii) and (iv)
(i) and (iii)

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Concrete Technology and Design of Concrete Structures
The effect of creep on modular ratio is

to decrease it
either to decrease or to increase it
to increase it
to keep it unchanged

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Concrete Technology and Design of Concrete Structures
In counterfort retaining walls, the main reinforcement in the stem at support is

Provided only on front face
Provided only on inner face
Provided both on inner and front faces
Not provided

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Concrete Technology and Design of Concrete Structures
The factor of safety for

None of these
steel is higher than that for concrete
steel is lower than that for concrete
steel and concrete are same

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