🔍 Key Concepts

• Low-water conditions in a water-tube auxiliary boiler • How continued firing affects overheated tubes with low or no water flow • Difference between securing fires and securing feedwater in an emergency

💭 Think About

• In a water-tube boiler with low water, what happens inside the tubes if you keep the fires going? • If a tube has already ruptured, what is the safest immediate action to prevent more damage and protect personnel? • In an emergency tube failure, is it usually safer to keep adding water, or to stop pressure and flow changes until the situation is stable?

✅ Before You Answer

• Identify which choices stop heat input to the damaged boiler quickly • Check which choice could worsen the leak or risk a furnace explosion by adding more water to overheated surfaces • Consider whether you should continue feedwater into a boiler that already has a ruptured tube and unknown internal damage