AMP - Aviation Maintenance Technician Powerplant Practice Exam

What is "compressor stall"?

1. A reduction in engine temperature

2. A disruption in airflow through the compressor

3. An increase in fuel flow

4. A malfunction of the ignition system

The correct answer is: A disruption in airflow through the compressor

Compressor stall refers to a condition where there is a disruption in airflow through the compressor section of a gas turbine or jet engine. This disruption can occur due to various factors, such as sudden changes in throttle setting, severe maneuvers, or an engine operating outside of its designed envelope. When airflow is disrupted, the normal smooth flow of air is impeded, which can lead to a loss of pressure and an increase in engine vibration and noise. In a functioning compressor, air is compressed and channeled efficiently, maintaining the required pressure and temperature for proper combustion. A stall interrupts this process. When airflow is insufficient, the air can reverse or separate from the compressor blades, leading to a decrease in thrust and potentially causing the engine to surge or lose power. It’s critical for aircraft operators to recognize and respond to compressor stall promptly, as it can affect engine performance and safety. The other options do not accurately depict the nature of a compressor stall. A reduction in engine temperature could be a result of various factors but is not related to airflow disruption. An increase in fuel flow could theoretically influence combustion but isn't inherently related to the stall phenomenon. Lastly, a malfunction of the ignition system addresses a different aspect of engine functionality, unrelated to airflow dynamics