Which of the following describes the fresh...

🔍 Key Concepts

• Inert Gas System (IGS) purpose on tankers—why we cool and treat flue gas before sending it to cargo tanks • Main components of an IGS: scrubber, blower, deck water seal, and fresh air intake • Difference between functions that protect against vacuum/overpressure versus those that control gas quality and temperature

💭 Think About

• Look at each option and ask: Is this mainly about protecting the deck seal and piping pressure, or about conditioning the gas (temperature and mixture)? • Which IGS component is responsible for preventing oxygen content in the flue gas from becoming too high—does that sound like a fresh air intake, or the combustion/scrubber control? • When hot flue gases come from the boiler, what must happen to them (temperature and composition) before they go to cargo tanks, and which choice best matches that role?

✅ Before You Answer

• Identify which option is clearly related to vacuum protection at the deck water seal—that is a different device from the fresh air intake. • Identify which option talks about oxygen limits (e.g., 3%)—ask yourself if adding fresh air would raise or lower oxygen content and whether that makes sense for inerting. • Ask: does the fresh air intake’s main job sound more like gas freeing, pressure protection, oxygen control, or cooling/mixing of flue gas before it goes to the tanks? Pick the one that best matches that purpose.

Which of the following describes the fresh air intake of the inert gas system?

it opens when there is excessive vacuum on the deck water seal

it allows the inert gas piping to be used for gas freeing the tanks

it prevents the flue gas from falling below an oxygen content of 3%

it enables outside air to mix with and to cool the hot flue gases

🔍 Key Concepts

💭 Think About

✅ Before You Answer