Engine Gas Turbines (Supplementary) USCG Question #54 (Set 2)

How is the lube oil supplied to each bearing in a GTE controlled?

Official USCG Answer & Rule Citation

Correct Answer: Option A — By a calibrated orifice

Calibrated orifices provide a fixed, predictable flow rate to each bearing based on the system's supply pressure. This method ensures that each bearing receives the precise volume of oil required for cooling and lubrication without the complexity of individual flow control valves at every bearing location.

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