Which action is not recommended when dealing with flammable materials?

Welding without protection is not recommended when dealing with flammable materials because it creates sparks and heat which can ignite nearby items. Flammable materials, such as liquids and gases, pose significant safety hazards if not handled properly. When welding, it is crucial to have adequate safety measures in place, such as using protective barriers, proper personal protective equipment, and ensuring that flammable items are moved away from the area to prevent accidental ignition.

In contrast, using cooling systems, maintaining a safe distance, and storing flammable materials in an appropriate location are all recommended practices designed to minimize the risk of fire. Cooling systems can help to reduce the temperature of materials and surfaces, while maintaining a safe distance helps to ensure that flammable materials are not exposed to sources of ignition. Proper storage in designated areas prevents accidental spills or leaks that could lead to hazardous situations. Collectively, these practices promote a safer environment when working with flammable materials.