The crankcase of many diesel engines are kept under a slight vacuum by the （）. -题库考试答案搜索网

The crankcase of many diesel engines are kept under a slight vacuum by the （）.

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2022-07-11 09:07

A、scavenging action of the piston
B、piston type vacuum pump taking suction off a differential manometer
C、gland exhausting manometer
D、crankcase exhaust fa

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正确答案

D

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标签：船舶动力装置海船船员考试

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