🔍 Key Concepts

• Function and purpose of a water gage glass on a steaming boiler • Immediate safety concerns when a boiler loses visible indication of water level • Normal position and purpose of gage glass cutout valves and associated automatic checks

💭 Think About

• If the gage glass suddenly breaks while the boiler is under pressure, what is your most urgent safety concern: controlling firing, feedwater, or securing the broken part? • Without a working gage glass, can you safely continue relying on automatic features alone, or must you take a positive manual action? • Which option directly addresses the source of steam and water escaping from the boiler when the glass is broken?

✅ Before You Answer

• Identify which listed action will physically stop or isolate the flow of steam and water through the broken glass connection. • Consider whether relying on automatic checks alone satisfies safe operating practice when a critical indicating device fails. • Verify which valves or controls are specifically associated with the gage glass assembly versus general boiler firing or feedwater systems.