38.Which of these non-metals is mainly used as an inert shielding gas? [A] Xenon [B] Hydrogen [C] Argon [D] Krypton Show Answer
The two inert gases that are generally used for shielding gases are argon and helium. Helium is a less dense gas than argon which means that when helium is used, more cubic feet per hour are required than with argon.
