正确答案: D

主机

题目：轴系理论中心线是（）的定位安装基准。

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学习资料的答案和解析：

[单选题]巨大型船舶对动力装置的重量和尺度没有特别要求，一般采用（）柴油机动力装置。

低速机

[单选题]船舶的有效功率与收到功率之比为推进效率。已知船舶有效功率为4500kW，推进效率为0.70，则螺旋桨收到功率为（）kW。

6430

[单选题]短轴系是指具有（）或（）中间轴的轴系。

一节/无

[单选题]水润滑艉轴铜套过度磨损后光车修理时，铜套厚度应（）。

≥0.02d＋5mm

[单选题]Charging is the filling of the engine cylinder with a supply of （） for compression.

fresh air

[单选题]The compressed air is admitted to each cylinder through a cam operated by starting air valve when the piston has just passed its （）.

TDC

[单选题]The selection of an oil depends （） on the operating conditions, the design of the engine and the type of fuel to be burned.

to a great extent

[单选题]The fuel injection system is very important, so any trouble of it will （） the operation of the main engine.

affect

[单选题]Diesel engines obtain combustion air through turbo chargers，blowers，or（）.

natural aspiration