Which action should be taken when an auxiliary boiler in is operation?（）<br>A:Clean all electrical connections<br>B:Lift the relief valves by hand<br>C:Inspect and clean all solenoid valves<br>D:Inspect for oil and water leaks

Which action should be taken when an auxiliary boiler in is operation?（）
A:Clean all electrical connections
B:Lift the relief valves by hand
C:Inspect and clean all solenoid valves
D:Inspect for oil and water leaks

出自：海船船员证

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