Question 107Gas Turbine - Assistant Engineer

The correct answer is B) Prevent lube oil contained in the LO storage and conditioning tank from draining into gearboxes and sumps. The lube oil supply check valves in the gas turbine engine lube oil system serve to prevent the lube oil stored in the LO storage and conditioning tank from draining back into the engine's gearboxes and sumps when the engine is not running. This ensures that the lube oil remains in the designated storage tank, ready to be distributed to the engine components when the engine is started and the lube oil pumps are activated. The other answer choices, while related to the lube oil system, do not accurately describe the primary purpose of the lube oil supply check valves in this specific system configuration.