During a normal preflight, what should be checked by applying fuel to the system?

• A. Burner pressure and condition of the valves
• B. Altimeter settings
• C. Wind direction at the ground
• D. Temperature of the tank

Answer: (A)

Testing the fuel delivery during a preflight focuses on making sure the burner system will respond reliably once you’re in flight. By introducing fuel into the lines, you can verify that the fuel is reaching the burner at the correct pressure and that the valves are functioning properly—opening, closing, and sealing without leaks. If the burner pressure is off or a valve leaks or sticks, fuel flow can become unsafe during operation, which is why this check is essential.

Altimeter settings, wind direction at the ground, and tank temperature aren’t determined by this aspect of the preflight. Altimeter settings relate to airspace and altitude, wind direction is a weather and environment factor, and while temperature can matter in some aspects of operation, it isn’t the test used to confirm the fuel system’s readiness.