Question 49Gas Turbine - 1st Asst/Chief
70% to passWhich of the following is true concerning the main engine lube oil system of the marine gas turbine shown in the illustration? Illustration GT-0024
AThe system includes a single combined lube oil supply and scavenge pump.
BThe lineshaft bearing lubrication system is provided for by the LOSCA.
CLubrication is provided for the main reduction gears through the transfer gearbox.
DAll of the above.
AI Explanation
The correct answer is A) The system includes a single combined lube oil supply and scavenge pump. This is correct because in a marine gas turbine system, the main engine lube oil system typically uses a single pump that both supplies oil to the engine components and scavenges the used oil. This combined supply and scavenge pump configuration is a common design feature of marine gas turbine lube oil systems. The other options are incorrect because B) the lineshaft bearing lubrication is not provided by the LOSCA (Lube Oil Scavenge Cooler Assembly), C) the main reduction gears are not lubricated through the transfer gearbox, and D) not all of the statements are true.
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