带有普通键槽的单螺旋桨轴或艉轴其检验间隔期为（）。

【名词&注释】

机动性(mobility)、螺旋桨轴(propeller shaft)、生命力强

[单选题]带有普通键槽的单螺旋桨轴或艉轴其检验间隔期为（）。

A. 1年
B. 2年
C. 3年
D. 4年

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学习资料：

[单选题]双轴系具有（）的特点。Ⅰ.高速；Ⅱ.便于操纵；Ⅲ.机动性好；Ⅳ.传动损失小；Ⅴ.生命力强。

A. Ⅱ＋Ⅲ
B. Ⅰ＋Ⅲ
C. Ⅰ＋Ⅲ＋Ⅴ
D. Ⅰ＋Ⅲ＋Ⅳ

[单选题]The cross-head shoes are white metal lined, grooves being cut horizontally on the face of the white metal to ensure （）.

A. an adequate supply of lube oil
B. an adequate supply of fuel oil
C. an adequate supply of turbine oil
D. an adequate supply of cylinder oil

[单选题]In the combustion chamber, the part whose surface is exposed to the highest temperature is the （）.

A. cylinder liner
B. cylinder cover
C. piston
D. exhaust valve

[单选题]Which of the combustion parameters listed is used in a diesel engine, but NOT related to the injection system?（）

A. Atomization
B. Metering
C. Effective stroke
D. Penetratio

[单选题]The lower section of a piston is called the （）.

A. land
B. skirt
C. crown
D. plate

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