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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
The property of the ingredients to separate from each other while placing the concrete is called

bulking
shrinkage
segregation
compaction

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Concrete Technology and Design of Concrete Structures
The minimum cover in a slab should neither be less than the diameter of bar nor less than

30 mm
20 mm
10 mm
15 mm

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Concrete Technology and Design of Concrete Structures
The slab is designed as one way if the ratio of long span to short span is

greater than 2
between 1 and 1.5
between 1.5 and 2
less than 1

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Concrete Technology and Design of Concrete Structures
When shear stress exceeds the permissible limit in a slab, then it is reduced by

Using high strength steel
Providing shear reinforcement
Using thinner bars but more in number
Increasing the depth

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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 ?

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

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Concrete Technology and Design of Concrete Structures
Modulus of elasticity of steel as per IS : 456-1978 shall be taken as

20 kN/cm²
200kN/mm²
2xl06N/cm²
200 kN/cm²

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