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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
To determine the modulus of rupture, the size of test specimen used is

100 x100 x500 mm
150 x150 x500 mm
100 x100 x700 mm
150 x150 x700 mm

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Concrete Technology and Design of Concrete Structures
Which of the following losses of prestress occurs only in pretensioning and not in post-tensioning ?

creep of concrete
loss due to friction
elastic shortening of concrete
shrinkage of concrete

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Concrete Technology and Design of Concrete Structures
The effect of creep on modular ratio is

to keep it unchanged
to decrease it
to increase it
either to decrease or to increase it

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Concrete Technology and Design of Concrete Structures
For concreting of heavily reinforced sections without vibration, the workability of concrete expressed as compacting factor should be

0.75 - 0.80
Above 0.92
0.85 - 0.92
0.75 - 0.80

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

1
0.75
0.5
0.33

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Concrete Technology and Design of Concrete Structures
In reinforced concrete footing on soil, the minimum thickness at edge should not be less than

200 mm
100 mm
150 mm
250 mm

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