Gas Turbines USCG Question #307 (Set 4)

When a compressor is in a stall condition, what will happen to the combustor and turbine temperatures?

Official USCG Answer & Rule Citation

Correct Answer: Option B — Rapidly increase.

During a compressor stall, the mass airflow through the engine drops significantly while fuel flow remains high. This creates an overly rich mixture, causing a rapid, uncontrolled increase in combustor and turbine temperatures. If not corrected, this thermal spike can quickly exceed the metallurgical limits of the turbine blades and nozzles.

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