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

【名词&注释】

螺旋桨(propeller)、零部件(parts)、直线度误差(straightness error)

[单选题]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。

A. Ⅱ＋Ⅲ
B. Ⅰ＋Ⅱ
C. Ⅰ＋Ⅱ＋Ⅲ
D. Ⅰ＋Ⅱ＋Ⅲ＋Ⅳ

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学习资料：

[单选题]舵杆弯曲变形时直线度误差＞2mm/m，允许采用（）修复。

A. 冷校直
B. 热校直
C. 加热-机械校直
D. 机械校直

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

A. the indicators
B. the starting valves
C. the cylinder lubricators
D. the turning gear

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

A. the bearing
B. the crosshead
C. bosses
D. bridge

[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. a bolt
B. a cap
C. a disc
D. 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 （）.

A. indicated horsepower
B. brake horsepower
C. net horsepower
D. friction horsepower

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