Concrete Technology and Design of Concrete Structures
High carbon content in the steel causes

increase in tensile strength but decrease in ductility
decrease in tensile strength but increase in ductility
increase in both tensile strength and ductility
decrease in both tensile strength and ductility

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Concrete Technology and Design of Concrete Structures
In prestressed concrete

forces of tension and compression change but lever arm remains unchanged
both forces of tension and compres-sion as well as lever arm remain unchanged
forces of tension and compressions remain unchanged but lever arm changes with the moment
both forces of tension and compres-sion as well as lever arm change

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Concrete Technology and Design of Concrete Structures
Select the correct statement for

Elastic modulus of high tensile steel is more than that of mild steel
Carbon percentage in high carbon steel is less than that in mild steel
High tensile steel is cheaper than mild steel
Elastic modulus of high tensile steel is nearly the same as that of mild steel

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