FAA Powerplant Written Practice Test

What does the engine inlet do on a turbine engine?

1. Provides uniform air flow to avoid compressor stall

2. Increases drag on the aircraft

3. Reduces engine weight for improved efficiency

4. Enhances fuel mixing during combustion

The correct answer is: Provides uniform air flow to avoid compressor stall

The engine inlet plays a critical role in the performance of a turbine engine by ensuring that the airflow entering the compressor is uniform and stable. A well-designed inlet helps to minimize turbulence and pressure losses, which can lead to compressor stall—a condition where the airflow into the compressor becomes disrupted, causing a significant loss of thrust and potential engine damage. By providing a streamlined path for the air to flow smoothly into the engine, the inlet allows the compressor to operate efficiently across a range of speeds and altitudes, effectively enhancing the overall performance and reliability of the engine.