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

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

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Concrete Technology and Design of Concrete Structures
According to IS : 456-1978, the fiexural strength of concrete is

inversely proportional to compressive strength
inversely proportional to square root of compressive strength
directly proportional to square root of compressive strength
directly proportional to compressive strength

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

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

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