In terms of welding safety, what is a "flashback"?

A "flashback" refers to a dangerous situation in welding where the flame travels back into the torch or gas supply line. This phenomenon can occur due to an improper flame setting, a clogged torch, or insufficient gas flow. When a flashback happens, it poses a significant risk as it can lead to torch damage, fire, or explosion.

Understanding this concept is crucial for maintaining safety during welding operations. Proper equipment maintenance and operation, along with adherence to safety protocols, can help prevent flashbacks. The other options, while related to welding, do not accurately describe the specific hazard associated with flashbacks. Knowledge of flashback prevention is essential for all welders to ensure a safe working environment.