To prevent accidental ignition in a welding shop, which action should be followed?

• A. Store shop rags in metal containers
• B. Store shop rags in wooden boxes
• C. Store shop rags in plastic bags
• D. Bury shop rags in a metal drum

Answer: (A)

The main concept is preventing spontaneous ignition of oil-soaked rags by isolating them in a metal container with a tight-fitting lid. Metal is noncombustible and resists heat, and a solid lid limits air flow and helps contain any heat that develops, reducing the chance that the rags will ignite on their own in a welding shop environment. Wooden boxes are combustible and can catch fire themselves, while plastic bags can trap heat and moisture and may encourage smoldering. Burying rags in a metal drum does not address heat buildup and is not a standard, safe disposal method. Use a closed metal container for oily rags and dispose of or refresh the contents regularly according to safety guidelines.