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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
In a spherical dome subjected to concentrated load at crown or uniformly distributed load, the meridional force is always

tensile
compressive
zero
tensile or compressive

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Concrete Technology and Design of Concrete Structures
Finer grinding of cement

both (a) and (b)
affects only the ultimate strength
does not affect the strength
affects only the early development of strength

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Concrete Technology and Design of Concrete Structures
Maximum quantity of water needed per 50 kg of cement for M 15 grade of concrete is

34 liters
32 liters
28 liters
30 liters

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Concrete Technology and Design of Concrete Structures
The property of the ingredients to separate from each other while placing the concrete is called

segregation
compaction
bulking
shrinkage

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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)

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

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Concrete Technology and Design of Concrete Structures
In a spherical dome the hoop stress due to a concentrated load at crown is

partly compressive and partly tensile
compressive everywhere
zero
tensile everywhere

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