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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
lower part of the beam
center
upper part of the beam

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Concrete Technology and Design of Concrete Structures
The average permissible stress in bond for plain bars in tension is

decreased by 25% for bars in compression
increased by 25% for bars in compression
decreased by 10% for bars in compression
increased by 10% for bars in compression

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Concrete Technology and Design of Concrete Structures
Sinking of an intermediate support of a continuous beam i) reduces the negative moment at support ii) increases the negative moment at support iii) reduces the positive moment at center of span iv) increases the positive moment at center of span The correct answer is

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

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

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Concrete Technology and Design of Concrete Structures
In counterfort type retaining walls i) the vertical slab is designed as a continuous slab ii) the heel slab is designed as a continuous slab iii) the vertical slab is designed as a cantilever iv) the heel slab is designed as a cantilever The correct answer is

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

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Concrete Technology and Design of Concrete Structures
A higher modular ratio shows

lower tensile strength of steel
higher tensile strength of steel
lower compressive strength of concrete
higher compressive strength of con-crete

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