Which device serves as a ground power source on the ground when connected?

Which device serves as a ground power source on the ground when connected?

• A. GPU
• B. APU Gen
• C. ADG
• D. IDG 1

Answer: (A)

This item tests how external power is supplied to an aircraft while it’s on the ground. A Ground Power Unit provides electrical power to the aircraft through a ground receptacle, allowing systems, avionics, climate control, and preflight tasks to run without starting the engines or the APU. An on-board APU generator can supply power too, but it operates only when the APU is running and is not the external ground power source used when the aircraft is connected to ground power. The Air Driven Generator is a backup unit activated in an emergency rather than the regular ground power source. The Integrated Drive Generator is the onboard generator that supplies power during flight and when the engines are running, not the external ground power supply used parked on the apron.

This item tests how external power is supplied to an aircraft while it’s on the ground. A Ground Power Unit provides electrical power to the aircraft through a ground receptacle, allowing systems, avionics, climate control, and preflight tasks to run without starting the engines or the APU.

An on-board APU generator can supply power too, but it operates only when the APU is running and is not the external ground power source used when the aircraft is connected to ground power. The Air Driven Generator is a backup unit activated in an emergency rather than the regular ground power source. The Integrated Drive Generator is the onboard generator that supplies power during flight and when the engines are running, not the external ground power supply used parked on the apron.