Combustion control systems on automatic boilers are designed to prevent immediate burner ignition after a normal or safety shutdown in order to allow time for __________.
A
the furnace to be purged
B
electric charge buildup in the igniter
C
the fuel pump to start
D
the drum level to equalize
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Question 1 / 205eccefa3bacbc34ba4d47c35
Question 1 of 205eccefa3bacbc34ba4d47c35
Combustion control systems on automatic boilers are designed to prevent immediate burner ignition after a normal or safety shutdown in order to allow time for __________.
Combustion control systems on automatic boilers are designed to prevent immediate burner ignition after a normal or safety shutdown in order to allow time for __________.