The photoelectric cell installed as part of the combustion safety controls of an automatically fired boiler will __________.
Official USCG Answer & Rule Citation
Correct Answer: Option D — sense light from the burner flame
In USCG Steam Plants (Boilers & Turbines), regarding 'The photoelectric cell installed as part of the combustion safety controls of an automatically fired boiler will', the verified engineering fact is: 'sense light from the burner flame'.
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