The two main types of compressor stall are known as what?

Correct Answer: Option C — Steady state and transient.

Steady state stalls are localized flow separations occurring at specific operating points, while transient stalls result from rapid changes in engine speed or load. Both types disrupt the Brayton cycle efficiency and require immediate control system intervention, such as adjusting variable stator vanes or bleed valves, to restore stable airflow.