The purpose of the programmed purge cycle on an automatically fired auxiliary boiler is to（）<br>A:cool the furnace to prevent pre-ignition<br>B:remove explosive vapors from the furnace<br>C:evaporate accumulated unburned fuel oil<br>D:provide sufficient air in the furnace to allow ignition of the fuel

The purpose of the programmed purge cycle on an automatically fired auxiliary boiler is to（）
A:cool the furnace to prevent pre-ignition
B:remove explosive vapors from the furnace
C:evaporate accumulated unburned fuel oil
D:provide sufficient air in the furnace to allow ignition of the fuel

出自：海船船员证

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