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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
Which of the following R.C. retaining walls is suitable for heights beyond 6m?

counterfort type
L-shaped wall
T-shaped wall
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
heat treated rolled wires
all have same tensile strength

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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 inner face in both directions
the front face in one direction

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Concrete Technology and Design of Concrete Structures
The effect of adding calcium chloride in concrete is i) to increase shrinkage ii) to decrease shrinkage iii) to increase setting time iv) to decrease setting time The correct answer is

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

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Concrete Technology and Design of Concrete Structures
The minimum cover to the ties or spirals should not be less than

15 mm
50mm
20 mm
25 mm

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Concrete Technology and Design of Concrete Structures
Cube strength of controlled concrete to be used for pretensioned and post-tensioned work respectively should not be less than

53 MPa and 42 MPa
42 MPa and 35 MPa
35 MPa and 42 MPa
42 MPa and 53 MPa

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