Which three components are essential in a turbine engine ignition system?

The essential components of a turbine engine ignition system are ignition exciters, high tension leads, and igniters. Ignition exciters generate the high-voltage electrical energy needed to create a spark for ignition. This energy is transmitted through high tension leads, which deliver the spark to the igniters. The igniters then produce the actual spark that ignites the fuel-air mixture in the combustion chamber.

Each of these components plays a vital role in ensuring that the engine can start and operate efficiently. Without the ignition exciters, there would be no sufficient voltage to initiate the spark. High tension leads are crucial for conducting that energy safely to the igniters, and without functional igniters, the combustion process cannot begin.

In contrast, the other options contain components that, while important for the overall functioning of the engine, do not specifically pertain to the ignition system. Fuel injectors and piston rings relate to fuel delivery and engine sealing, respectively, while components like the combustion chamber and exhaust system involve broader engine operation but do not directly contribute to ignition. Lastly, the throttle body, fuel pumps, and valves are integral to fuel management and engine performance but are not components of the ignition system itself.