Prepare for the Aircraft Maintenance Technician 40 OandP Exam. Practice with flashcards and multiple choice questions. Each question is accompanied by hints and explanations to support your learning. Ace your exam with confidence!

Multiple Choice

Which device generates ignition spark independent of the aircraft's electrical system?

Magneto is the device that generates ignition spark independent of the aircraft’s electrical system. It is driven directly by the engine and uses permanent magnets and windings to produce a high-voltage pulse that fires the spark plugs without needing battery power or an alternator. This self-contained ignition means the engine can continue to run if the aircraft’s electrical system fails, and many aircraft use dual magnetos for redundancy. Carburetors and fuel pumps deal with fuel delivery and mixing, not ignition. An altimeter measures altitude using air pressure and does not generate or control ignition. This is why a magneto is the correct choice for producing a spark without relying on the electrical system.

Magneto is the device that generates ignition spark independent of the aircraft’s electrical system. It is driven directly by the engine and uses permanent magnets and windings to produce a high-voltage pulse that fires the spark plugs without needing battery power or an alternator. This self-contained ignition means the engine can continue to run if the aircraft’s electrical system fails, and many aircraft use dual magnetos for redundancy.

Carburetors and fuel pumps deal with fuel delivery and mixing, not ignition. An altimeter measures altitude using air pressure and does not generate or control ignition. This is why a magneto is the correct choice for producing a spark without relying on the electrical system.