The two main types of "compressor" stalls are known as which of the following?

Correct Answer: Option A — Steady state and transient.

Compressor stalls are categorized as steady state or transient. Steady state stalls result from aerodynamic imbalances at constant speeds, while transient stalls occur during rapid power changes. Both disrupt airflow through the compressor blades, potentially causing severe mechanical damage if not managed by the engine control system's bleed air logic.