🔍 Key Concepts

• Fire and explosion prevention in machinery spaces and bilges • Why bilges are a concern for fuel vapors and flammable gases • Regulatory intent in 46 CFR electrical rules: minimizing ignition sources near vapors

💭 Think About

• Which choice directly addresses the danger of fuel vapors that tend to collect low in a compartment? • Think about what really matters most for preventing ignition: the location of the spark source, the type of current, or the voltage rating? • Are all of the listed characteristics equally important for preventing fire in spaces where vapors may be present, or is one clearly tied to the bilge hazard described in the question?

✅ Before You Answer

• Identify where flammable vapors are most likely to accumulate on a vessel (high or low). • Check which option specifically mentions bilges and consider why regulations care about that area. • Ask whether regulations commonly require motors to be a certain voltage or AC type just for ignition safety, or if they focus more on location/protection from vapors.