Engineering Materials
Acidic solution is one which has pH value

pH value has nothing to do with neutral solution
Less than 7
Equal to 7
Greater than 7

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Engineering Materials
In spheroidising process, the steel is

Heated up to the lower critical temperature and then cooled in still air
Heated slightly above the lower critical temperature and then cooled slowly to a temperature of 600°C
None of these
Heated below the lower critical temperature and then cooled slowly

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