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Engine_2014 : Motor Plants and Auxiliary Boilers - 1709/2614
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A photoelectric cell installed in an automatically fired auxiliary boiler burner management system __________ .
A) opens the burner circuit upon sensing a flame failure
B) detects a flame failure by monitoring radiant heat from glowing refractory
C) requires mechanical linkage to secure the burner fuel supply
D) must be bypassed at low firing rates
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