🔍 Key Concepts

• Inert gas system components on tankers (fans, scrubber, deck water seal, PV valves, etc.) • The main purpose of the scrubber in an inert gas system • Which part of the system actually controls or maintains tank pressure

💭 Think About

• List what happens to boiler flue gas as it passes through the inert gas system, step by step. At which stage is it cooled and cleaned? • Ask yourself: is pressure inside cargo tanks usually controlled by cleaning equipment or by separate pressure/vacuum control devices? • Think about which option describes more of a "control" function for tanks rather than a "treating the gas" function.

✅ Before You Answer

• Identify which options describe treating or cleaning the gas itself (temperature, soot, chemical content). • Identify which option describes controlling conditions in the cargo tanks rather than modifying the gas stream. • Recall that tank pressure/vacuum control is usually associated with PV valves and deck seals, not with gas-washing equipment.