Question 10 LB01 - Lifeboat Operator

The Correct Answer is A. **Explanation for Option A (Ventilate before starting engine):** Gasoline vapors are heavier than air and tend to accumulate in the lower parts of a boat, particularly in the bilges and engine compartment. These vapors are highly flammable and explosive when mixed with air in the correct concentration. Before starting the engine, which can introduce a spark (from the starter, wiring, or ignition system), it is crucial to eliminate or disperse these vapors. Ventilation—typically using a blower system mandated by safety regulations—forces fresh air into the compartment and draws the vapors out, significantly reducing the risk of a dangerous explosion. **Why the other options are incorrect:** * **B) Keep ports, doors, windows, and hatches closed:** This action traps the volatile gasoline vapors inside the boat, concentrating them and increasing the risk of an explosion when the engine is started. Proper ventilation requires openings to allow fresh air in and vapors out. * **C) Start the engines immediately:** Starting the engines immediately is extremely dangerous. Any residual gasoline fumes accumulated during the fueling process pose a significant explosion hazard that must be mitigated by ventilation *before* any ignition source is activated. * **D) None of the above:** This is incorrect because ventilation (Option A) is a mandatory and critical safety procedure after fueling.