True or False: Used drums should not be used for welding, cutting, or hot work because of the potential for explosions.

The statement is true because used drums, especially those that previously contained flammable materials, can retain hazardous vapors that may ignite during processes like welding, cutting, or other hot work. The residues within these drums can create an explosive atmosphere if the proper precautions are not taken. Therefore, it's essential to follow safety protocols regarding these materials to prevent accidents and ensure the safety of workers and the surrounding environment.

In contrast, the other options suggest varying degrees of risk or misunderstanding regarding the safety and handling of used drums. Some may imply that there could be situations where used drums are deemed safe without recognizing the inherent risks involved, while others might downplay the necessary precautions that should always be observed regardless of whether a drum is empty or full.