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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
Which of the following R.C. retaining walls is suitable for heights beyond 6m?

L-shaped wall
counterfort type
All of these
T-shaped wall

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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

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

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Concrete Technology and Design of Concrete Structures
Air entrainment in the concrete increases

the unit weight
strength
workability
the effects of temperature variations

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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

compressive everywhere
partly compressive and partly tensile
zero
tensile everywhere

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Concrete Technology and Design of Concrete Structures
The strength of concrete after one year as compared to 28 days strength is about

15 to 20% more
25 to 50% more
20 to 25% more
10 to 15% more

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

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

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