Tailpipe fires can result from what during startup?

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Multiple Choice

Tailpipe fires can result from what during startup?

Explanation:
Excess fuel during startup can lead to a tailpipe fire because the engine may deliver more fuel than can be burned in the combustor while starting. If there’s a rich mixture or fuel flooding during start, some unburned fuel travels through the exhaust and encounters the very hot tailpipe. The high exhaust temperature can ignite that unburned fuel, producing a tailpipe fire. Proper fuel control during start minimizes unburned fuel reaching the exhaust, reducing this risk. The idea that there’s no risk of spread or that it’s only internal to the engine isn’t correct, and a proper fuel balance helps prevent the problem.

Excess fuel during startup can lead to a tailpipe fire because the engine may deliver more fuel than can be burned in the combustor while starting. If there’s a rich mixture or fuel flooding during start, some unburned fuel travels through the exhaust and encounters the very hot tailpipe. The high exhaust temperature can ignite that unburned fuel, producing a tailpipe fire. Proper fuel control during start minimizes unburned fuel reaching the exhaust, reducing this risk. The idea that there’s no risk of spread or that it’s only internal to the engine isn’t correct, and a proper fuel balance helps prevent the problem.

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