🔍 Key Concepts

• Function and purpose of a boiler drum in a marine boiler system • Function and purpose of a header in a boiler tube system • How design differences relate to connections with tubes rather than operating conditions

💭 Think About

• Think about what a boiler drum does compared to what a header does in the steam/water circulation system. • Consider whether the main difference is usually about operating conditions (like temperature) or about how tubes connect to each component. • Ask yourself: which option describes a design limitation that would practically distinguish one pressure vessel type from the other?

✅ Before You Answer

• Be clear on the primary role of a drum (steam/water reservoir and separation) vs. a header (manifolding tube connections). • Check which choice refers specifically to how tubes enter or penetrate the vessel rather than overall size or temperature. • Eliminate any option that sounds like a general operating condition that would likely be similar for both components in the same boiler.