🔍 Key Concepts

• Flame safeguard system purpose on an auxiliary boiler • Normal safety response when a flame is not proven or a sensing/control component fails • Which condition would be considered safest by design if the system malfunctions

💭 Think About

• If the part of the system that detects or proves flame fails, what should the control system be designed to do to protect the boiler and ship? • Which choices would increase danger or pressure in the furnace, and which would remove the source of danger? • Is a safeguard system usually designed to fail in a way that keeps equipment running, or in a way that stops fuel flow?

✅ Before You Answer

• Eliminate any choice that would continue or increase fuel burning after a control failure • Consider which option represents a fail-safe condition rather than a fail-to-danger condition • Remember that loss of flame detection should quickly secure fuel to the burner rather than attempt to relight or continue firing