🔍 Key Concepts

• Mechanical exhaust ventilation requirements for gasoline engine and fuel tank compartments on small passenger vessels • What the regulations say about achieving at least one complete air change before starting an engine • The safety purpose: removing gasoline vapors from enclosed spaces

💭 Think About

• Which choice directly addresses the amount of ventilation (how much air must be exchanged) rather than vague conditions like proper or good? • Think about what the regulation can realistically measure: can the law require something subjective like proper supply or good operating condition, or does it use an objective standard? • Which option clearly ties to the specific hazard of gasoline vapor accumulation in an enclosed engine compartment?

✅ Before You Answer

• Look up the wording in 46 CFR Part 25 dealing with ventilation of spaces containing gasoline engines or fuel tanks • Identify which option uses a measurable standard that inspectors can verify, rather than a general statement • Eliminate answers that describe side effects (like motor warm-up or checking condition) instead of the regulatory requirement itself