In which of the following situations is cutting and welding NOT permitted?

Cutting and welding are high-temperature processes that can generate sparks, molten metal, and heat, which pose significant risks in certain environments. In explosive atmospheres, the presence of flammable gases, vapors, or dust can easily ignite from the heat and sparks produced during cutting and welding operations. This risk is heightened because explosive atmospheres can lead to catastrophic explosions that may endanger not just the workers but also the surrounding areas.

In contrast, cutting and welding in authorized areas ensures that safety protocols and regulations are observed, while well-ventilated rooms help dissipate potentially hazardous fumes and gases. Areas with safety signage are generally identified as safer locations for such activities, promoting awareness and precaution among personnel. Therefore, performing cutting and welding in explosive atmospheres is strictly prohibited to prevent accidents and ensure the safety of all involved.