Heavy soot accumulations in an auxiliary boiler could be caused by（）<br>A:water in the fuel oil<br>B:excessive cycling<br>C:high fuel oil pressure<br>D:improper burner maintenance

Heavy soot accumulations in an auxiliary boiler could be caused by（）
A:water in the fuel oil
B:excessive cycling
C:high fuel oil pressure
D:improper burner maintenance

出自：海船船员证

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