Engineering Materials
1841 high speed steel contains

Vanadium 4%, chromium 18% and tungsten 1%
Vanadium 1%, chromium 4% and tungsten 18%
Vanadium 18%, chromium 1% and tungsten 4%
None of these

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Engineering Materials
Aluminium bronze contains

94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe
92.5% aluminium, 4% copper, 2% nickel, and 1.5% Mg
10% aluminium and 90% copper
90% magnesium and 9% aluminium with some copper

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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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