Final Quiz GTE1

Which component maintains fuel flow if the filter becomes clogged?

• Pressure regulator
• Flow divider
• Filter bypass valve
• Fuel return line

Which fuel-related issue can cause intermittent thrust loss without engine shutdown?

• Sticking fuel pressurizing valve
• Partially clogged fuel filter with a sticking bypass valve
• Fluctuating fuel metering unit response
• Vapor lock in high-pressure fuel line

Which condition can most likely cause a rich blowout during engine acceleration?

• Oversupply of fuel due to a stuck metering valve
• Fuel pump lag under thermal stress
• Delayed igniter spark
• Low compressor bleed pressure during spool-up

Which issue might go unnoticed during preflight but lead to fuel starvation in-flight?

• Sticking fuel shutoff valve solenoid
• Blocked fuel vent line
• Slightly miscalibrated fuel flow transmitter
• Intermittent fuel boost pump cycling

What’s the likely result of a partial failure in the secondary nozzle circuit of a duplex fuel system?

• Flameout during idle
• Reduced compressor pressure ratio
• Unstable flame and potential hot spots
• Delayed turbine spool-up time

Why must FSII (fuel system icing inhibitor) in jet fuel be precisely dosed and monitored?

• It degrades fuel volatility if overdosed
• It thickens at low temperatures
• It can absorb water and become corrosive
• It neutralizes fuel additives if imbalanced

Which oil seal type uses internal pressure to minimize leakage?

• Lip-type seal
• Carbon ring seal
• Labyrinth seal
• Face seal

Which property is least desirable in turbine engine lubricants?

• High volatility
• Low volatility
• High Viscosity
• Low Viscosity

What is the maximum allowable concentration of antioxidants in jet fuel?

• 18 mg/L
• 24 mg/L
• 30 mg/L
• 50 mg/L

Why is it crucial for turbine oils to have low volatility, particularly at high altitudes?

• To reduce oil loss due to evaporation
• To prevent excessive oil thickening
• To improve oil's ability to withstand heat
• To increase oil's lifespan at high speeds