The fuel oil system of a gas turbine engine provides all EXCEPT which of the following?
Official USCG Answer & Rule Citation
Correct Answer: Option D — Acts as a cooling medium for the lube oil cooler
Gas turbine fuel systems meter fuel, actuate variable stator vanes, and serve as hydraulic media for control systems. However, fuel is not used as a cooling medium for lube oil; that function is performed by dedicated lube oil coolers using seawater or air as the primary heat sink.
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