Question 106Gas Turbine - 1st Asst/Chief
70% to passLubricating oil contamination in a gas turbine bearing oil sump will most likely come from which of the following?
AFailure of the lube oil pump.
BFuel oil contamination.
CFailure of the scavenging pump.
DFailure of seal pressurization air.
AI Explanation
The correct answer is D) Failure of seal pressurization air. Explanation: In a gas turbine, the lube oil sump is typically pressurized with seal air to prevent oil contamination from entering the system. If the seal pressurization air system fails, it can allow lubricating oil to be drawn into the bearing oil sump, leading to oil contamination. This is the most likely cause of lubricating oil contamination in a gas turbine bearing oil sump, compared to the other options provided, which are less likely to be the primary source of the issue.
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