Which of the listed statements is correct concerning the starting of centrifugal pumps?（）<br>A:They should always be started with the discharge valve closed<br>B:They should always be started with the discharge valve opened<br>C:A priming pump is always required to flood the impeller suction<br>D:They should always be started with the sealing line valves closed

Which of the listed statements is correct concerning the starting of centrifugal pumps?（）
A:They should always be started with the discharge valve closed
B:They should always be started with the discharge valve opened
C:A priming pump is always required to flood the impeller suction
D:They should always be started with the sealing line valves closed

出自：海船船员证

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