A Back Fire Flame Arrestor is designed to:

A Back Fire Flame Arrestor is designed to:

• A. Prevent water ingress
• B. Prevent heat and flames of an engine backfire from igniting vapors
• C. Prevent oil leaks
• D. Improve engine efficiency

Answer: (B)

A backfire flame arrestor is designed to prevent ignition of flammable vapors by heat and flames from an engine backfire. If a backfire travels back into the intake or ventilation lines, it can ignite vapors present in the system or nearby fuel vapors. The arrestor uses a dense metal screen or baffle that cools the flame and blocks its progression, allowing gas to vent while stopping the flame front from reaching the vapors. This dramatically reduces the risk of a fire or explosion in the engine compartment or fuel systems. It isn’t meant to keep water out, fix oil leaks, or improve engine efficiency, which is why those options don’t fit this purpose.

A backfire flame arrestor is designed to prevent ignition of flammable vapors by heat and flames from an engine backfire. If a backfire travels back into the intake or ventilation lines, it can ignite vapors present in the system or nearby fuel vapors. The arrestor uses a dense metal screen or baffle that cools the flame and blocks its progression, allowing gas to vent while stopping the flame front from reaching the vapors. This dramatically reduces the risk of a fire or explosion in the engine compartment or fuel systems.

It isn’t meant to keep water out, fix oil leaks, or improve engine efficiency, which is why those options don’t fit this purpose.