正确答案: C

Ⅰ＋Ⅱ＋Ⅲ

题目：直接传动的轴系主要包括（）等零部件。Ⅰ.推力轴及其轴承；Ⅱ.中间轴及其轴承；Ⅲ.艉轴及其轴承；Ⅳ.艉轴管装置；Ⅴ.螺旋桨。

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学习资料的答案和解析：

[单选题]舵杆弯曲变形时直线度误差＞2mm/m，允许采用（）修复。

热校直

[单选题]Before starting the turning gear, （） should be worked by hand to minimize corrosive action on the liners.

the cylinder lubricators

[单选题]The gudgeon pin is carried in （） in the piston skirt.

bosses

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

a nut

[单选题]The most important factor in engine performance is the actual power output at the end of the crankshaft available for doing workThis is known as （）.

brake horsepower