What is the APU's primary function?

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Prepare for the GoJet Airlines CRJ-550 Test. Use flashcards, multiple choice questions, and detailed explanations to ace your exam!

Multiple Choice

What is the APU's primary function?

Explanation:
An Auxiliary Power Unit is mainly there to provide electrical power for the aircraft when the engines aren’t running. That electrical power lets you run avionics, lighting, climate control, and other systems on the ground or before starting the engines, without needing external power. The APU can also supply bleed air for engine starts and for air conditioning, but that’s a secondary capability. Hydraulic power and cooling come from other systems, not the APU’s primary role. So electrical power generation is the best answer.

An Auxiliary Power Unit is mainly there to provide electrical power for the aircraft when the engines aren’t running. That electrical power lets you run avionics, lighting, climate control, and other systems on the ground or before starting the engines, without needing external power. The APU can also supply bleed air for engine starts and for air conditioning, but that’s a secondary capability. Hydraulic power and cooling come from other systems, not the APU’s primary role. So electrical power generation is the best answer.

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