What is a "fuel line"?

A "fuel line" refers specifically to a tube or pipe that transports fuel from the fuel tank to the engine. This component is essential in the aircraft fuel system, as it facilitates the flow of fuel necessary for the operation of the engine. The fuel line must be constructed of materials that can withstand the pressures and temperatures associated with fuel delivery while also being resistant to corrosion and other forms of wear over time.

When considering the functions of the other options, they represent separate components or systems within the fuel management process but do not define a fuel line. For instance, regulating fuel temperature and filtering fuel are both critical to maintaining engine performance and safety but are distinct functions served by different parts. Similarly, a container where fuel is stored would refer to the fuel tank itself, which is the starting point for fuel delivery rather than the pathway it takes to the engine. Thus, the definition of a fuel line is accurately captured as the tube carrying fuel from the tank to the engine, highlighting its crucial role in the fuel delivery system of an aircraft.