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Concrete Technology and Design of Concrete Structures

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

0.75
0.5
1
0.33

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Concrete Technology and Design of Concrete Structures
Workability of concrete is inversely proportional to

the air in the mix
vater-cement ratio
time of transit
size of aggregate

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Concrete Technology and Design of Concrete Structures
In case of hand mixing of concrete, the extra cement to be added is

5%
10%
20%
15%

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Concrete Technology and Design of Concrete Structures
The percentage of voids in cement is approximately

60%
50%
40%
70%

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

less
more
equal
None of these

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Concrete Technology and Design of Concrete Structures
In counterfort type retaining walls i) the vertical slab is designed as a continuous slab ii) the heel slab is designed as a continuous slab iii) the vertical slab is designed as a cantilever iv) the heel slab is designed as a cantilever The correct answer is

(iii) and (iv)
(ii) and (iii)
(i) and (ii)
(i) and (iv)

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