Concrete Technology and Design of Concrete Structures
Examine the following statements :i) Factor of safety for steel should be based on its yield stress,ii) Factor of safety for steel should be based on its ultimate stress,iii) Factor of safety for concrete should be based on its yield stress,iv) Factor of safety for concrete should be based on its ultimate stress.The correct statements are

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

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

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

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