Which unit provides external electrical power to an aircraft while on the ground?

Which unit provides external electrical power to an aircraft while on the ground?

• A. Auxiliary Power Unit
• B. Ground Power Unit
• C. Circuit Breaker
• D. PRAM

Answer: (B)

Ground Power Unit provides external electrical power to an aircraft while it’s on the ground. A GPU is ground-based equipment that connects to the aircraft through a power receptacle and delivers the necessary electrical power for cabin systems, avionics, and environmental control, as well as to start the aircraft’s systems if needed. Using external power from a GPU lets the aircraft avoid drawing power from its own systems or from the APU, saving fuel and reducing wear on onboard equipment. The onboard APU can supply power when external power isn’t available, but it’s an internal source used when gates don’t have a GPU. A circuit breaker is a protective device that interrupts power if something goes wrong, not a power source, and PRAM isn’t used to provide external ground power.

Ground Power Unit provides external electrical power to an aircraft while it’s on the ground. A GPU is ground-based equipment that connects to the aircraft through a power receptacle and delivers the necessary electrical power for cabin systems, avionics, and environmental control, as well as to start the aircraft’s systems if needed. Using external power from a GPU lets the aircraft avoid drawing power from its own systems or from the APU, saving fuel and reducing wear on onboard equipment. The onboard APU can supply power when external power isn’t available, but it’s an internal source used when gates don’t have a GPU. A circuit breaker is a protective device that interrupts power if something goes wrong, not a power source, and PRAM isn’t used to provide external ground power.