2021职业技能鉴定海员证往年考试试题(3Q)

1. [单选题]半圆方向60°NE换算成圆周方向为：()

A. 60°
B. 120°
C. 060°
D. 240°

2. [单选题]往复泵工作时间长，吸入空气室的空气量会( )。

A. 增加
B. 减小
C. 不变
D. 随液体性质而变

3. [单选题]Loss of lubricating oil pressure to the main propulsion diesel engine will actuate a/an _____.

A. over-speed trip
B. audible/visual alarm
C. the ships/boats general alarm
D. reserve oil storage tank

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