During preflight, all fuel tanks should be fired to determine what?

• A. The burner pressure and condition of the valves
• B. The height above ground
• C. The color of the propane
• D. The air temperature at altitude

Answer: (A)

Testing the fuel system by firing the burner during preflight confirms that the burner can deliver the correct flame and that the fuel control valves are functioning properly. This check ensures the regulator is supplying the right pressure, that valves open and close smoothly, and that there are no leaks or hose issues that could cause a unsafe flame or failure to ignite. The other ideas—how high you are above the ground, the color of the propane, or the air temperature at altitude—aren’t determined or affected by a burner fire test, so they aren’t what this preflight check is meant to verify.