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) SteelThis question was addressed to me during an internship interview.This question is from Arc Welding topic in division Welding and Related Processes of Casting-Forming-Welding II

Which material is not used as an iron coating on the electrode used in

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) SteelThis question was addressed to me during an internship interview.This question is from Arc Welding topic in division Welding and Related Processes of Casting-Forming-Welding II
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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