正确答案: D

4年

题目：带有普通键槽的双螺旋桨轴或艉轴其检验间隔期为（）。

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学习资料的答案和解析：

[单选题]导致曲轴轴线产生塌腰形变形，臂距差朝正值增大方向变化的因素有（）。Ⅰ.爆发压力；Ⅱ.飞轮重量；Ⅲ.曲轴自重；Ⅳ.活塞装置重量；Ⅴ.轴系轴线低于曲轴轴线，两法兰呈上开口。

A．Ⅰ＋Ⅲ＋Ⅳ

[单选题]An interlock in the remote operating valve line stops the valve （） when the engine turning gear is engaged.

opening

[单选题]Sea water is not directly used as a coolant for engines because of its （）.

corrosive action

[单选题]For a given size engine, the two-stroke/cycle diesel engine will deliver more power than a four-stroke/cycle diesel engine because （）.

it develops twice as many power strokes at the same speed