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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
Workability of concrete is inversely proportional to

the air in the mix
size of aggregate
time of transit
vater-cement ratio

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Concrete Technology and Design of Concrete Structures
The approximate value of the ratio between direct tensile strength and flexural strength is

0.5
1
0.33
0.75

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Concrete Technology and Design of Concrete Structures
In a ring beam subjected to uniformly distributed loadi) shear force at mid span is zeroii) shear force at mid span is maximumiii) torsion at mid span is zeroiv) torsion at mid span is maximum The correct answer is

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

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Concrete Technology and Design of Concrete Structures
Prestress loss due to friction occurs

only in post-tensioned beams
in both post-tensioned and preten-sioned beams
only in pretensioned beams
None of these

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Concrete Technology and Design of Concrete Structures
A continuous beam is deemed to be a deep beam when the ratio of effective span to overall depth (1/D) is less than

2.5
5.5
4.5
3.5

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Concrete Technology and Design of Concrete Structures
In T-shaped R C. retaining walls, the main reinforcement in the stem is provided on

the inner face in one direction
the front face in both directions
the front face in one direction
the inner face in both directions

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