🔍 Key Concepts

• Boiler water level control during idle or standby conditions • Difference between main feed system and auxiliary/standby feed arrangements • How condensate and feedwater normally flow in a marine steam plant

💭 Think About

• When a boiler is idle (not steaming), which system is normally lined up to safely add water without affecting the main steaming cycle? • Which choice is specifically intended to supply water to the boiler under abnormal or low-load conditions, rather than full-power operation? • How is condensate normally returned to the boiler, and which of these systems is dedicated to maintaining proper boiler level even when the main plant is not in operation?

✅ Before You Answer

• Identify which option is normally used as the primary high‑pressure feedwater source for an operating boiler • Identify which option is usually intended for standby/auxiliary feed or topping‑off functions • Confirm which systems mainly handle condensate collection/recirculation, not direct boiler level control at idle