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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
The compressive strength of 100 mm cube as compared to 150 mm cube is always

more
None of these
less
equal

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Concrete Technology and Design of Concrete Structures
The purpose of reinforcement in pre-stressed concrete is

All of these
To resist tensile stresses
To provide adequate bond stress
To impart initial compressive stress in concrete

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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 on
i) bottom face near counterfort
ii) top face near counterfort
iii) bottom face near centre of span
iv) top face near centre of span
The correct answer is

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

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Concrete Technology and Design of Concrete Structures
The load carrying capacity of a helically reinforced column as compared to that of a tied column is about

5% less
10% more
10% less
5% more

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Concrete Technology and Design of Concrete Structures
Finer grinding of cement

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

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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
wR / 4d
2wR/d

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