🔍 Key Concepts

• Boiler low-water casualty procedures in engineering standing orders/manuals • Effect of continued firing with exposed boiler tubes • Purpose of a gage glass blow-down and when it is safe to perform

💭 Think About

• If water level is already too low to see in the gage glass, what is the biggest immediate danger to the boiler itself? • Which control action directly stops heat input to overheated tubes, and which actions would still leave the fire burning? • Under what conditions is blowing down a gage glass unsafe or not recommended?

✅ Before You Answer

• Verify which option removes heat input to the boiler safest and fastest • Check which actions might worsen damage if tubes are already exposed (e.g., adding more feedwater to a dry, overheated boiler) • Confirm when a gage glass blow-down should be done: normal check vs. emergency low-water/tube-failure situation