Civil Engineering - Building Materials - Discussion

5. 

Pig iron is manufactured from the ores by

[A]. dressing
[B]. calcination and roasting
[C]. smelting
[D]. all the above.

Answer: Option D

Explanation:

No answer description available for this question.

Aamir said: (Aug 21, 2016)  
What does mean dressing in here?

Adolf said: (Nov 1, 2016)  
Dressing is the removal of earth impurities from ore after it digged !

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