The lube oil system shown in the illustration, consists of which of the following sub- systems? Illustration GT-0024

Correct Answer: Option D — All of the above.

A complete gas turbine lube oil system integrates supply, scavenging, and venting subsystems. The supply circuit provides pressurized oil, the scavenge circuit recovers oil from the sumps, and the venting system maintains proper pressure balance and removes air/vapors to ensure efficient operation and prevent seal leakage.