FAA AMT (Aviation Maintenance Technician) Airframe Practice Exam

Question: 1 / 1030

To prevent vapor lock in fuel lines at high altitude, some aircraft are equipped with what?

Booster pumps

As the aircraft ascends to higher altitudes, the air thins and provides less oxygen for combustion. This can result in a decrease in fuel flow and potential vapor lock in the fuel lines. Booster pumps are installed to increase the pressure and flow of fuel, preventing any interruptions in fuel delivery to the engine. Pressure relief valves, centrifugal pumps, and piston pumps are not specifically designed to prevent vapor lock and may not be as effective as booster pumps in addressing this issue.

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Pressure relief valves

Centrifugal pumps

Piston pumps

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