Protective gas used in the annealing furnace for steel coil comprises – McqOptions

MCQOPTIONS

1.	Protective gas used in the annealing furnace for steel coil comprises of$?
A.	95% N‚Äö√á√á + 5% H‚Äö√á√á
B.	5% H‚Äö√á√á + 9% N‚Äö√á√á
C.	100% CO
D.	100 %H‚Äö√á√á
Answer» B. 5% H‚Äö√á√á + 9% N‚Äö√á√á

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