What is recommended when any welding is required on a job site?

• A. No special precautions.
• B. A fire extinguisher must be on site during welding.
• C. A person with a fire extinguisher should be on a fire watch for at least 30 minutes after welding.
• D. Evacuate the area during welding.

Answer: (C)

Welding on a job site can produce sparks and heat that easily start fires if nearby materials are flammable. The way to prevent this is to assign a fire watch: a person with a fire extinguisher who stays on site to monitor for signs of fire during the welding and for a period after welding ends. The standard practice is at least 30 minutes after work finishes, because embers can smolder and ignite materials once the main heat source is gone. This ongoing watch allows immediate action if a spark jumps to a nearby object, and it supports a quick alert and response if a fire starts.

Being without special precautions misses the risk entirely; having only a fire extinguisher present during welding doesn’t cover post-weld ignition; evacuating the area eliminates monitoring and sudden control of any fire. The fire watch approach directly addresses the risk by providing continuous oversight and readiness to suppress fires as soon as they appear.