🔍 Key Concepts

• Boiler water level and low-water hazards in an automatically fired auxiliary boiler • Purpose of pre-start checks before lighting off a cold boiler • Difference between normal operating actions versus initial safety checks

💭 Think About

• Which condition, if incorrect before light-off, could most quickly and seriously damage the boiler or cause an unsafe situation? • Which option is something that must be verified BEFORE any firing begins, rather than an action taken after fires are established? • Look at each choice and ask: is this a safety-critical precondition, or is it either unnecessary or done at a different stage of operation?

✅ Before You Answer

• Verify which item directly prevents low-water overheating or boiler damage at start-up • Check whether any option describes an action that would normally occur after the boiler is already lit or in operation • Confirm which choice aligns with the standard pre-light-off inspection for any steam boiler, especially one that is automatically fired