What device uses engine power to generate electrical power?

Prepare for the Airplane Flying Test. Study with multiple-choice questions, flashcards, and comprehensive explanations. Get ready to ace your test!

Multiple Choice

What device uses engine power to generate electrical power?

Explanation:
Engine power drives an alternator or generator, which converts mechanical energy from the engine into electrical energy to power the aircraft’s electrical system. The engine’s accessory drive spins the generator, and the output is typically 28-volt DC after rectification and regulation. When the engine isn’t running, the battery or an emergency power source can sustain essential systems for a short time. The other options are not devices that generate electricity: an altimeter is an instrument that measures altitude from air pressure, altitude (MSL) is a height reference, and Alpha Mode of Operation isn’t a device for generating electrical power.

Engine power drives an alternator or generator, which converts mechanical energy from the engine into electrical energy to power the aircraft’s electrical system. The engine’s accessory drive spins the generator, and the output is typically 28-volt DC after rectification and regulation. When the engine isn’t running, the battery or an emergency power source can sustain essential systems for a short time. The other options are not devices that generate electricity: an altimeter is an instrument that measures altitude from air pressure, altitude (MSL) is a height reference, and Alpha Mode of Operation isn’t a device for generating electrical power.

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