Which statement is TRUE concerning inert gas...

🔍 Key Concepts

• Inert gas system purpose – what it is designed to prevent inside cargo tanks on tankers • Source of inert gas on many crude oil tankers (think about where large amounts of exhaust gas are produced) • Typical composition of inert gas and whether noble gases like helium are practical or economical for shipboard use

💭 Think About

• Ask yourself: What is the main safety function of an inert gas system in a tank vessel’s cargo tanks? Would that function increase or decrease rusting? • Consider which shipboard system continuously produces large volumes of gas with very low oxygen content that can be reused rather than wasted. • Think about cost and availability: Is helium commonly carried in the huge quantities needed to blanket cargo tanks, or is there a more obvious gas source already available on the ship?

✅ Before You Answer

• Verify which common shipboard exhaust stream is often cleaned and cooled to become inert gas for cargo tanks. • Check whether oxygen content in inert gas is high or low, and how that affects corrosion (rusting) in steel tanks. • Confirm from basic engineering knowledge whether large-scale use of helium is realistic on commercial tankers compared to flue gas from boilers.

Which statement is TRUE concerning inert gas systems on tank vessels?

Using the system accelerates the rusting of the tanks.

Flue gases from the ship's boilers are used in some systems.

Helium is the preferred inert gas.

All of the above

🔍 Key Concepts

💭 Think About

✅ Before You Answer