Which statement about engine starting is true?

• A. Transmits power to the engine for starts.
• B. Transmits lubrication to engine
• C. Transmits electrical power to avionics
• D. Transmits hydraulic power to pumps

Answer: (A)

The key idea is how the engine actually gets moving to begin a cycle. Starting an engine requires delivering torque to rotate the engine’s shafts so air, fuel, and ignition can take over and the engine spools up to idle speed. The starting system is what provides that initial power to the engine, turning it over until ignition and fuel control can sustain the run. That’s why the statement about transmitting power to the engine for starts is the correct one.

Lubrication, avionics power, and hydraulic pumps are all important systems, but they’re not what initiates engine rotation. Lubrication is about reducing wear once the engine is turning; avionics power comes from the aircraft’s electrical system; hydraulic power drives various actuators and pumps. None of these describe the act of starting the engine itself, which is accomplished by delivering power to rotate the engine.