Commercial Pilot Airplane (CAX) General Practice Exam 2025 – Your Complete All-in-One Guide to Exam Success!

The electrical system in an aircraft is crucial because it powers all onboard lighting and avionics equipment. This system is responsible for generating, distributing, and managing electrical energy throughout the aircraft. It provides the necessary power for cockpit instruments, navigation systems, communication equipment, and various lighting features including cabin lights and exterior lights.

In contrast, the hydraulic system operates components such as flight control surfaces and landing gear, but it does not play a role in electrical functions. The control system refers to the mechanisms that govern the aircraft's flight, including the pilot's input into the aircraft's various controls. The fuel system is dedicated to the storage, management, and delivery of fuel to the engines, completely separate from electrical functions. Thus, the correct identification of the electrical system recognizes its fundamental role in ensuring that essential systems like lighting and avionics function properly for safe aircraft operation.