🔍 Key Concepts

• Compressor stall behavior in gas turbine or jet engines • Difference between long-lasting (sustained) conditions and short, momentary (dynamic) events • Typical terminology used in aviation and marine gas turbine engineering

💭 Think About

• Which option uses wording that sounds like two different patterns of how a stall can occur over time, rather than unrelated engine problems? • Do any of the choices describe conditions that sound more like causes or consequences (e.g., flame going out, high temperature) rather than types of stall? • Think about how textbooks usually divide phenomena: do they often pair a stable/continuous condition with a brief/changing one?

✅ Before You Answer

• Identify which choices include terms that are clearly not normally paired with the word ‘stall’ in gas turbine discussions. • Ask whether each pair sounds like two modes of the same phenomenon or two totally different engine issues. • Before selecting, be sure your choice reflects a contrast between a more constant condition and a more momentary or changing condition.