Engineering Materials
Bronze contains

70 - 75% copper and rest tin
90% copper and 10% tin
70% copper and 30% zinc
85 - 92% copper and rest tin with little lead and nickel

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Engineering Materials
Carbon steel is

An alloy of iron and carbon with varying quantities of phosphorus and sulphur
Extensively used for making cutting tools
Refined from cast iron
Made by adding carbon in steel

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Engineering Materials
The brown smoke during the operation of a Bessemer converter indicates that the

The brown smoke does not occur during the operation of a Bessemer converter
Air is burning out silicon and manganese
Silicon and manganese has burnt and carbon has started oxidizing
The converter must be titled to remove the contents of the converter

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