Final answer:
The safe distance for fuel service equipment during refuel/defuel operations is not universally set and depends on several factors including regulations, type of fuel, and equipment used. Safety precautions and knowledge of emergency procedures are also important to ensure a safe environment.
Step-by-step explanation:
The question refers to the necessary precautions and safety distances required during fuel service operations, specifically refueling and defueling processes. The safety distance for fuel service equipment during these operations varies depending on several factors including the type of fuel, the equipment used, and the specific regulations or standards set by authoritative bodies such as the National Fire Protection Association (NFPA) or local safety regulations.
There isn't a universally prescribed distance as it is subject to local laws and regulations, but as a general rule, maintaining a safe distance ensures that in the event of a spill, ignition sources are far enough away to prevent a fire or explosion. Additionally, safety precautions such as knowing the location of a fire extinguisher, eyewash station, and having a clear understanding of emergency procedures are critical.