Which aircraft system operates hydraulic pumps, warning systems, and the fuel system?

The correct answer reflects the vital role of the electrical system in operating various components of an aircraft, including hydraulic pumps, warning systems, and the fuel system. The electrical system supplies power to hydraulic pumps, enabling them to function properly and manipulate flight control surfaces or landing gear effectively. Additionally, warning systems rely on electrical signals to alert the crew about any issues within the aircraft systems, including those related to hydraulics and fuel. The fuel system also utilizes electrical components for fuel pumps and valves that ensure proper fuel delivery to the engines.

Although mechanical systems play a role in numerous aircraft functions, they typically do not encompass the breadth of modern aircraft operations that rely significantly on electrical power. Electro-hydraulic refers specifically to systems that combine electrical control with hydraulic actuation but is more niche compared to the broader function of the electrical system as a whole. The hydraulic system itself focuses primarily on fluid mechanics and does not encompass the electrical power necessary to operate these critical subsystems.