Which of the following is the most probable...

Which of the following is the most probable...

Question 1 of 270705eccef9fbacbc34ba4d46b67

Which of the following is the most probable cause for the sump oil to be excessively aerated on an aeroderivative main propulsion gas turbine engine?

Question 1 of 27070

Q

Which of the following is the most probable cause for the sump oil to be excessively aerated on an aeroderivative main propulsion gas turbine engine?

🔍 Key Concepts

• Lube oil system on an aeroderivative gas turbine and where air can enter the oil • Purpose and operation of an air‑oil separator in a gas turbine lubrication system • How compressor discharge pressure and inlet air temperature mainly affect overall engine performance rather than directly mixing air into sump oil

💭 Think About

• Which component in the options is directly part of the lubrication system and has the specific job of separating air from oil? • Do changes in exhaust pressure, compressor discharge pressure, or inlet temperature normally cause foaming/aeration in the sump, or do they mainly affect thrust/power and efficiency? • Think about a failure that would allow more air to remain mixed with the returning oil instead of being removed—what device is designed to prevent that?

✅ Before You Answer

• Identify which choice is a lubrication‑system component versus general engine operating conditions. • Ask: which option would most directly result in air remaining entrained in the oil returning to the sump? • Confirm whether any of the pressure/temperature options would typically show up first as performance changes (power/efficiency) rather than as a lubrication issue like foamy or aerated sump oil.