Backfire flame arrestors are required on gasoline powered engines on small passenger vessels. Which option below correctly identifies this engine type?

Backfire flame arrestors are required on gasoline powered engines on small passenger vessels. Which option below correctly identifies this engine type?

• A. Gasoline powered engines
• B. Diesel engines
• C. Electric motors
• D. Steam engines

Answer: (A)

Gasoline-powered engines on small boats create a risk of flames traveling back into the intake and igniting fuel vapors in the carburetor or air path. A backfire flame arrestor is installed on the air intake to stop any flame from moving backward into the engine, protecting the engine compartment from ignition. Diesel, electric, and steam systems don’t pose the same backfire risk through the intake, so they aren’t described by this requirement. So the engine type referred to is gasoline-powered engines.

Gasoline-powered engines on small boats create a risk of flames traveling back into the intake and igniting fuel vapors in the carburetor or air path. A backfire flame arrestor is installed on the air intake to stop any flame from moving backward into the engine, protecting the engine compartment from ignition. Diesel, electric, and steam systems don’t pose the same backfire risk through the intake, so they aren’t described by this requirement. So the engine type referred to is gasoline-powered engines.