🔍 Key Concepts

• 46 CFR definitions for pressure vessels and how they are categorized • Difference between fired and unfired pressure vessels in marine service • Function and heat source of a fresh water evaporator on board ships

💭 Think About

• Ask yourself: Does a fresh water evaporator have combustion taking place inside it, or does it use steam/engine heat supplied from somewhere else? • Which option best matches a piece of equipment that turns seawater into fresh water by using waste heat or steam, rather than burning fuel directly? • Among the choices, which ones clearly relate to steam generation, and which relate to condensing or containing pressure without direct firing?

✅ Before You Answer

• Verify whether a fresh water evaporator normally has burners or flames in its shell • Check 46 CFR terminology to see how auxiliary boiler, condenser, and pressure vessel are distinguished • Confirm which term in the choices correctly applies to a vessel that operates under pressure but is not directly heated by combustion