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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
Maximum distance between expansion joints in structures as per IS : 456 – 1978 is

20 m
30 m
60 m
45 m

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Concrete Technology and Design of Concrete Structures
Strength of concrete increases with

decrease in curing time
decrease in size of aggregate
increase in water-cement ratio
increase in fineness of cement

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Concrete Technology and Design of Concrete Structures
According to IS : 456- 1978, minimum slenderness ratio for a short column is

more than 24
less than 12
less than 18
between 18 and 24

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Concrete Technology and Design of Concrete Structures
In a counterfort retaining wall, the main reinforcement is provided on thei) bottom face in front counterfortii) inclined face in front counterfortiii) bottom face in back counterfortiv) inclined face in back counterEortThe correct answer is

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

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Concrete Technology and Design of Concrete Structures
In order to obtain the best workability of concrete, the preferred shape of aggregate is

All of these
rounded
angular
elongated

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

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

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