🔍 Key Concepts

• boiler water level and carryover during foaming conditions • location and function of the superheater, economizer, desuperheater, and internal feed pipe in a typical marine boiler • how wet steam or water droplets leaving the steam drum can affect downstream components

💭 Think About

• Which component is directly exposed to the steam leaving the steam drum and would be most vulnerable to damage from water droplets carried over with the steam? • Which of these components handles hot flue gas on the outside and water/steam on the inside, and how would water carryover affect it? • Think about which component is designed to reduce steam temperature versus increase it—how would excess moisture impact each one?

✅ Before You Answer

• Be clear on where foaming occurs (in the steam drum/water surface) and what actually leaves the drum when carryover happens. • Visualize the steam path from the boiler drum through each listed component and ask: which one sees the first impact of wet steam? • Confirm the primary function of each option (heat steam, recover exhaust heat, cool steam, or distribute feedwater) before ruling it in or out.