What hazards are unique to gas welding and not common in most arc welding processes?

• A. Gas leaks and oxygen enrichment leading to fire risk; pure oxygen near hydrocarbons can cause explosive mixtures.
• B. Arc glare and spatter.
• C. Requires flux.
• D. No hazards.

Answer: (A)

Gas welding centers on using a fuel gas with oxygen, so the hazards tied to this method come from the gases themselves and their flame. Gas leaks can fill the workspace with flammable vapors, and if the flame uses or creates an oxygen-rich environment near hydrocarbons, those vapors can ignite more easily or form explosive mixtures. Pure oxygen near oils, greases, or other hydrocarbons can cause very rapid and violent combustion, a risk not common in arc welding. Arc glare, spatter, fumes, and electric shock are typical concerns with arc welding but aren’t the unique fire/explosion hazards of gas welding. The option describing gas leaks and oxygen enrichment near hydrocarbons best captures the hazards distinctive to gas welding.