In the event of a flame failure, what is the first response of the system?

• A. The burner restarts
• B. Magnetic oil valve closes
• C. Alarm is triggered
• D. Fuel flow is interrupted

Answer: (B)

In the context of flame safety systems, the first response to a flame failure is for the magnetic oil valve to close. This action is critical because it helps prevent fuel from continuing to flow into the burner once a flame has been lost, which could lead to an unsafe buildup of unburned fuel and potentially result in an explosion or fire hazard.

By closing the magnetic oil valve, the system ensures that the combustion process is immediately halted, thereby protecting both equipment and personnel. This response is part of an interlocked safety system designed to act swiftly in response to abnormalities, prioritizing safety over other functions like restarting the burner or triggering alarms.

While other responses such as triggering an alarm or interrupting fuel flow may occur subsequently or as part of a broader safety protocol, the immediate and crucial action that mitigates risk right after flame failure is the closing of the magnetic oil valve.