1.

Which material is not used as an iron coating on the electrode used in arc welding?(a) Cellulose(b) Iron powder(c) Calcium fluoride(d) Steel

Answer» Correct answer is (d) Steel

Explanation: Materials that are used as coating on the electrode, that are used in arc welding, are cellulose, iron powder, calcium fluoride and rutile. Iron is used for ease of weld, but not steel, though it mainly contains iron.


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