安装艉轴和螺旋桨时（）应在现场监督。

【名词&注释】

螺旋桨(propeller)、流线型(streamline)、轮机长(chief engineer)

[单选题]安装艉轴和螺旋桨时（）应在现场监督。

A. 轮机长
B. 大管轮
C. 二管轮
D. 三管轮

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学习资料：

[单选题]船轴工作轴颈磨损后，经测量表明（）超标准时应予以修复。Ⅰ.圆度；Ⅱ.圆柱度；Ⅲ.椭圆度；Ⅳ.法兰径向跳动；Ⅴ.法兰端面跳动。

A. Ⅱ＋Ⅲ
B. Ⅰ＋Ⅱ＋Ⅳ
C. Ⅰ＋Ⅱ＋Ⅴ
D. Ⅰ＋Ⅲ＋Ⅳ

[单选题]按舵叶截面形状分为（）舵。Ⅰ.平板形；Ⅱ.叶形；Ⅲ.机翼形；Ⅳ.流线型；Ⅴ.直线形。

A. Ⅰ＋Ⅱ
B. Ⅰ＋Ⅳ
C. Ⅲ＋Ⅳ
D. Ⅰ＋Ⅲ

[单选题]A common trouble with the fuel pump plungers or fuel valve spindle is （）.

A. broken down
B. stuck
C. oil leakage
D. carbonized

[单选题]A governor automatically controls engine speed by regulating （）.

A. fuel supply
B. firing order
C. engine load
D. oil level

[单选题]Marine four-stroke diesel engines are mainly （）.

A. of crosshead type
B. of trunk piston type
C. of low speed type
D. all the above

[单选题]Which of the following may take place if the clearance of the main bearings are excessive?（）

A. bearing knocks
B. dropping of pressure of LO
C. noises
D. all the above

[单选题]Crank web deflection readings will give a positive indication of （）.

A. worn main bearing journals
B. torsional stress deformation
C. slack thrust bearings
D. bearing shells shim dimensio

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