Prior to lighting off a cold automatically fired auxiliary boiler, you should （）.<br>A:check and regulate the water level<br>B:close the air cock once fires are lit<br>C:blowdown the gage glass<br>D:crack the steam stop to assure protective steam flow

Prior to lighting off a cold automatically fired auxiliary boiler, you should （）.
A:check and regulate the water level
B:close the air cock once fires are lit
C:blowdown the gage glass
D:crack the steam stop to assure protective steam flow

出自：海船船员证

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