Which of the following problems can cause fluctuating pressures in the closed cooling syst

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Which of the following problems can cause fluctuating pressures in the closed cooling system of a main propulsion diesel engine?

A.Defective temperature controls in the system

B.Cavitation in the cooling water pump

C.Opened vent in the cooling system

D.Restricted water passages in the engine

请帮忙给出正确答案和分析,谢谢!

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