Which of the following characteristic does not define a coated electrode?(a) Maintenance of arc(b) Protection from oxygen(c) Protection from nitrogen(d) Preventing other elements into molten metalThis question was posed to me in unit test.I'd like to ask this question from Arc Welding Equipment topic in portion Welding and Related Processes of Casting-Forming-Welding II

Which of the following characteristic does not define a coated electro

1.	Which of the following characteristic does not define a coated electrode?(a) Maintenance of arc(b) Protection from oxygen(c) Protection from nitrogen(d) Preventing other elements into molten metalThis question was posed to me in unit test.I'd like to ask this question from Arc Welding Equipment topic in portion Welding and Related Processes of Casting-Forming-Welding II
Answer» Right option is (d) PREVENTING other elements into molten METAL For EXPLANATION I would say: A coated electrode is a further classification of a consumable electrode. The purpose of the electrode is to maintain the arc, to SHIELD the molten metal from oxygen and nitrogen PRESENT in the air and to provide other alloying elements into the molten metal.

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