正确答案: B

仅Ⅱ对

题目：船舶机动航行时，动力装置的故障应按（）。Ⅰ.工作时间来衡量；Ⅱ.工作次数来衡量

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学习资料的答案和解析：

[单选题]发动机换向时间越短其机动性越好，规定不得大于（）s。

15

[单选题]Simplex艉轴密封装置采用的密封圈是（）。

橡胶环

[单选题]The interface between the liquid seal (water) and the oil should be positioned （） possible to the bowl periphery.

as close as

[单选题]The lower end of each piston rod is reduced in diameter to fit a bore in （）, this being secured to the piston rod by a nut.

the cross-head

[单选题]The term （） refers to one complete sequence of operations required to produce power in an engine.

cycle