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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
According to Whitney’s theory, ultimate strain of concrete is assumed to be

0.3%
0.4%
0.6%
0.5%

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Concrete Technology and Design of Concrete Structures
Most common method of prestressing used for factory production is

Long line method
Freyssinet system
Lee-Macall system
Magnel-Blaton system

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Concrete Technology and Design of Concrete Structures
Modulus of rupture of concrete is a measure of

compressive strength
split tensile strength
direct tensile strength
flexural tensile strength

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Concrete Technology and Design of Concrete Structures
For a reinforced concrete section, the shape of shear stress diagram is

rectangular above neutral axis and parabolic below neutral axis
wholly parabolic
parabolic above neutral axis and rectangular below neutral axis
wholly rectangular

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

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

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Concrete Technology and Design of Concrete Structures
Increase in the moisture content in concrete

All of these
does not change the strength
reduces the strength
increases the strength

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