Which personal safety equipment is essential during fuel system maintenance?

In the context of fuel system maintenance, flame-resistant clothing is essential due to the inherent risks associated with handling fuels, which are flammable and can pose serious fire hazards. This type of protective clothing helps to minimize the risk of burns or injuries in the event of a flash fire. When working in an environment where fuel vapors may ignite, wearing flame-resistant gear provides an extra layer of safety, reducing the potential for severe injuries.

While other personal safety equipment might have their place in various work environments—such as sunblock for sun exposure or rubber boots for protecting against spills—flame-resistant clothing specifically addresses the crucial risk posed by flammable materials encountered in fuel system maintenance. This makes it the most relevant and necessary choice in this context.