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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

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

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Concrete Technology and Design of Concrete Structures
In symmetrically reinforced sections, shrinkage stresses in concrete and steel are respectively

compressive and tensile
both compressive
both tensile
tensile and compressive

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Concrete Technology and Design of Concrete Structures
The individual variation between test strength of sample should not be more than

± 10% of average
± 15% of average
±5% of average
±20% of average

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Concrete Technology and Design of Concrete Structures
In the design of a front counterfort in a counterfort retaining wall, the main reinforcement is provided oni) bottom face near counterfortii) top face near counterfortiii) bottom face near centre of spaniv) top face near centre of span The correct answer is

only (ii)
both (i) and (iv)
only (i)
both (ii) and (iii)

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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

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

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

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

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