FAA Powerplant Written Practice Test

What happens after control signals are sent from the Electronic Engine Control to the engine?

1. A The engine operates independently of the control unit

2. B Feedback is sent back to the EEC

3. C The system enters standby mode

4. D Manual overrides are necessary

The correct answer is: B Feedback is sent back to the EEC

After control signals are sent from the Electronic Engine Control (EEC) to the engine, feedback is sent back to the EEC. This feedback loop is essential for the EEC to monitor the performance of the engine and make any necessary adjustments to ensure optimal operation. The EEC continuously analyzes data from engine sensors, such as temperature, pressure, and speed, and uses this information to adjust fuel flow, ignition timing, and other parameters to maintain efficient and safe engine performance. The feedback mechanism allows the EEC to detect any changes in engine condition and respond promptly, which is crucial in maintaining engine stability and efficiency. This dynamic interaction between the EEC and the engine is what characterizes modern electronic engine control systems, enabling precise control over engine functions. In contrast, the other options do not accurately represent the operation of an EEC. The engine operating independently of the control unit would negate the benefits of electronic control, while entering standby mode would imply a lack of active feedback and control. Manual overrides being necessary is also not the standard operation, as the EEC is designed to manage the engine autonomously under normal conditions.