Massachusetts 2nd Class Fireman's Practice Exam

Question: 1 / 400

If the main fuel valve is closed while the burner is on, what will likely happen?

There will be high water

There will be low water

The oil temperature will drop

The flame detector will activate

When the main fuel valve is closed while the burner is running, the immediate consequence is a disruption in the fuel supply. As the fuel is cut off, the burner will experience a lack of combustion fuel, which will lead to a reduction or complete extinguishing of the flame. Flame detection systems are designed to monitor the presence of a flame; thus, when the flame goes out due to the absence of fuel, the flame detector will recognize this change. As a result, it will activate an alarm or safety mechanism to indicate that the burner has gone out, which is crucial for preventing dangerous conditions, such as the accumulation of unburned fuel. This function is essential for ensuring the safety of the boiler system and to initiate an automatic shut-off to prevent hazards.

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