Final answer:
Statement B is correct; firefighters must wear suitable personal protective equipment (PPE) for the hazards they face, such as Nomex gear for fire and heat resistance, whereas PPE like BSL-4 suits offer protection in a laboratory setting.
Step-by-step explanation:
Among the statements provided regarding personal protective clothing, the true statement is B. It requires firefighters to wear the most appropriate PPE for the hazard they face. This aligns with safety standards that dictate that firefighters must select personal protective equipment (PPE) based on the specific hazards they are likely to encounter. Nomex, a material widely used in protective clothing, is an example of an innovation that came from space technology, developed to provide heat resistance and durability in extreme conditions. Firefighter gear, including Nomex hoods, shirts, and trousers, is designed to protect against the intense heat and potential burns one might encounter during fires and especially in wildland firefighting scenarios. However, it is important to note that PPE cannot always prevent burns in all situations, such as a flashover. PPE, like that worn by medical personnel, is also essential for protection against infections or hazardous materials, with some suits even providing their own air supply, as is necessary for BSL-4 laboratory work.