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Concrete Technology and Design of Concrete Structures

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

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

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Concrete Technology and Design of Concrete Structures
While designing the pile as a column, the end conditions are nearly

one end fixed and other end free
both ends hinged
both ends fixed
one end fixed and other end hinged

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Concrete Technology and Design of Concrete Structures
The main reason for providing number of reinforcing bars at a support in a simply supported beam is to resist in that zone

shear stress
tensile stress
compressive stress
bond stress

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Concrete Technology and Design of Concrete Structures
Minimum grade of concrete to be used in reinforced concrete as per IS:456-1978 is

M25
M15
M20
M10

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Concrete Technology and Design of Concrete Structures
The purpose of reinforcement in pre-stressed concrete is

To impart initial compressive stress in concrete
All of these
To provide adequate bond stress
To resist tensile stresses

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Concrete Technology and Design of Concrete Structures
The load carrying capacity of a helically reinforced column as compared to that of a tied column is about

10% more
5% more
5% less
10% less

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