Which gas is used as a protection in carbon arc welding?(a) Carbon dioxide(b) Carbon monoxide(c) Carbon tetra fluoride(d) MethaneI had been asked this question in class test.I'd like to ask this question from Arc Welding Methods topic in portion Welding and Related Processes of Casting-Forming-Welding II

Which gas is used as a protection in carbon arc welding?(a) Carbon dio

1.	Which gas is used as a protection in carbon arc welding?(a) Carbon dioxide(b) Carbon monoxide(c) Carbon tetra fluoride(d) MethaneI had been asked this question in class test.I'd like to ask this question from Arc Welding Methods topic in portion Welding and Related Processes of Casting-Forming-Welding II
Answer» The correct answer is (b) Carbon monoxide Explanation: In carbon ARC welding, there has to be a protection to be PROVIDED to the molten weld. This protection is provided in the FORM of an envelope by USING a long arc GIVING carbon monoxide gas.

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