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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
Which of the following losses of prestress occurs only in pretensioning and not in post-tensioning ?

elastic shortening of concrete
loss due to friction
shrinkage of concrete
creep of concrete

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Concrete Technology and Design of Concrete Structures
In reinforced concrete footing on soil, the minimum thickness at edge should not be less than

150 mm
250 mm
100 mm
200 mm

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Concrete Technology and Design of Concrete Structures
The property of fresh concrete, in which the water in the mix tends to rise to the surface while placing and compacting, is called

bulking
segregation
creep
bleeding

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Concrete Technology and Design of Concrete Structures
Maximum percentage reinforcement in case of slabs is limited to

4
8
9
2

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Concrete Technology and Design of Concrete Structures
Sinking of an intermediate support of a continuous beami) reduces the negative moment at supportii) increases the negative moment at supportiii) reduces the positive moment at center of spaniv) increases the positive moment at center of span The correct answer is

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

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Concrete Technology and Design of Concrete Structures
For a reinforced concrete section, the shape of shear stress diagram is

wholly rectangular
rectangular above neutral axis and parabolic below neutral axis
wholly parabolic
parabolic above neutral axis and rectangular below neutral axis

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