🔍 Key Concepts

• Function of an auxiliary feed system in a marine boiler plant • Difference between systems that handle water/feedwater versus those that handle steam • Procedures used when a boiler is idle but still in service/standby

💭 Think About

• Ask yourself: When a boiler is not steaming but still kept ready, which system is normally designed to safely add water to the drum? • Which of these options actually moves WATER into the boiler, and which primarily deal with STEAM conditions (temperature/quality)? • If the main feed system is not operating at full load, what backup or alternative feed path is typically provided on ships?

✅ Before You Answer

• Identify which choices are water/feedwater supply systems versus steam-conditioning systems • Confirm which system is specifically intended for use when the boiler is not under normal firing/operating conditions • Verify which system can raise boiler drum level without relying on steam flow through the main system