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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
The maximum value of hoop compression in a dome is given by (where, w = load per unit area of surface of dome R = radius of curvature d = thickness of dome)

wR/d
wR / 4d
wR/2d
2wR/d

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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
loss due to friction
shrinkage of concrete

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Concrete Technology and Design of Concrete Structures
Modulus of rupture of concrete is a measure of

compressive strength
direct tensile strength
split tensile strength
flexural tensile strength

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Concrete Technology and Design of Concrete Structures
A beam curved in plan is designed for

bending moment and shear
bending moment and torsion
shear and torsion
bending moment, shear and torsion

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Concrete Technology and Design of Concrete Structures
The approximate value of the ratio between direct tensile strength and flexural strength is

0.33
0.75
0.5
1

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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

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

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