Engineering Materials
Corrosion resistance of steel is increased by adding

Nickel and molybdenum
Chromium and nickel
Tungsten and sulphur
Aluminium and zinc

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

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

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