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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
creep of concrete
shrinkage of concrete
loss due to friction

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Concrete Technology and Design of Concrete Structures
If nominal shear stress tv exceeds the design shear strength of concrete xc, the nominal shear reinforcement as per IS : 456-1978 shall be provided for carrying a shear stress equal to

Tv + Tc
xv
xc

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Concrete Technology and Design of Concrete Structures
A T-shaped retaining wall mainly conssits of

two cantilevers
four cantilevers
one cantilever
three cantilevers

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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

creep
bleeding
segregation
bulking

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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

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

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Concrete Technology and Design of Concrete Structures
The depth of footing for an isolated column is governed byi) maximum bending momentii) shear forceiii) punching shear The correct answer is

only (i)
(i), (ii) and (iii)
(i) and (ii)
(i) and (iii)

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