Engine Gas Turbines (Supplementary) USCG Question #31 (Set 1)

Which type of GTE can handle a larger volume of air?

Official USCG Answer & Rule Citation

Correct Answer: Option A — Twin-spool engine

Twin-spool engines utilize two independent compressor-turbine sets rotating at different speeds. This configuration allows for higher overall pressure ratios and greater mass airflow capacity compared to single-spool designs. The high-pressure and low-pressure spools operate at their respective optimal speeds, significantly enhancing engine efficiency and total power output.

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