When start a screw pump, the by pass valve should be （）. -题库考试答案搜索网

When start a screw pump, the by pass valve should be （）.

单选题

2022-01-01 11:49

A、closed
B、opened fully
C、cracked open
D、partly ope

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正确答案

B

试题解析

标签：船舶电气与船舶安全

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