Your vessel has a gasoline engine and a mechanical exhaust ventilation system. BEFORE starting the engine, the exhaust blower should be run long enough to __________.
• Gasoline vapors behavior in enclosed spaces (heavier than air, explosion risk) • Purpose of a mechanical exhaust blower on gasoline-powered vessels • Difference between removing dangerous fumes vs. providing combustion air for the engine
• Ask yourself: What is the MAIN safety hazard with gasoline in engine compartments before starting the engine? • Which option directly addresses getting rid of a potential ignition/explosion hazard rather than testing equipment or helping the engine run better? • Does the blower’s primary job relate more to crew safety or engine performance?
• Verify which answer clearly describes clearing hazardous fumes from the compartment, not just checking equipment • Check which option refers to the space where vapors collect, not to the engine itself • Eliminate any choice that focuses mainly on the blower motor or engine comfort, instead of vapor removal and compartment safety
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