Engineering Materials
Amorphous material is one

Which is not attacked by phosphorous
Which emits fumes on melting
In which atoms align themselves in a geometric pattern upon solidification
In which there is no definite atomic structure and atoms exist in a random pattern just as in a liquid

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

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

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