🔍 Key Concepts

• Boiler low-water condition safety procedures • Risk of overheating boiler tubes when water level is lost • Difference between checking an instrument and immediately securing heat source

💭 Think About

• What is the greatest immediate danger when the water level drops out of sight in the gauge glass while steaming? • Which action most directly removes or reduces the cause of that danger, rather than trying to adjust or troubleshoot instruments? • If the gauge glass shows no water, is it safer to assume a false low-level indication or a real low-water condition until proven otherwise?

✅ Before You Answer

• Verify which step is considered the primary emergency action for suspected low-water in a steaming boiler. • Consider which choice could worsen tube overheating if the water is actually low. • Check marine boiler operating procedures for what to do first when water level cannot be seen in the glass.