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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
Strength of concrete increases with

decrease in curing time
decrease in size of aggregate
increase in water-cement ratio
increase in fineness of cement

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Concrete Technology and Design of Concrete Structures
Increase in the moisture content in concrete

All of these
reduces the strength
does not change the strength
increases the strength

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Concrete Technology and Design of Concrete Structures
Due to shrinkage stresses, a simply supported beam having reinforcement only at bottom tends to

Deflect downward
Deflect downward or upward
Deflect upward
None of these

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Concrete Technology and Design of Concrete Structures
The recommended value of modular ratio for reinforced brick work is

35
40
99
88

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Concrete Technology and Design of Concrete Structures
Prestress loss due to friction occurs

only in pretensioned beams
in both post-tensioned and preten-sioned beams
only in post-tensioned beams
None of these

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

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