Excessive clearances in the main or crank-pin bearings will

【名词&注释】

润滑油(lubricating oil)、直线度(straightness)、中心线(center line)、柴油机气缸套(engine cylinder liner)、螺旋桨轴(propeller shaft)、双螺旋桨(double propellers)、发生变化

[单选题]Excessive clearances in the main or crank-pin bearings will sometimes be indicated by （） before any bearing knock is heard.

A. loss of flow in the fuel system
B. loss of pressure in the air system
C. loss of flow in the lubricating system
D. loss of pressure in the lubricating system

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学习资料：

[单选题]6ESD43/82型船用柴油机气缸套最大内径增量为1.5mm，则最大缸径为（）。

A. 431.5mm
B. 821.5mm
C. 44.5mm
D. 83.5mm

[单选题]轴系校中状态发生变化主要包括轴系中心线的（）发生变化。Ⅰ.直线度；Ⅱ.偏差度；Ⅲ.对中性；Ⅳ.同轴度；Ⅴ.曲折度。

A. Ⅱ＋Ⅳ
B. Ⅰ＋Ⅱ
C. Ⅰ＋Ⅱ＋Ⅲ
D. Ⅰ＋Ⅲ＋Ⅳ

[单选题]测量相邻轴连接法兰上的δ、φ，可采用（）。Ⅰ.塞尺法；Ⅱ.直尺法；Ⅲ.直尺-塞尺法；Ⅳ.指针法；Ⅴ.平轴法。

A. Ⅲ＋Ⅳ＋Ⅴ
B. Ⅰ＋Ⅱ
C. Ⅰ＋Ⅱ＋Ⅲ
D. Ⅲ＋Ⅳ

[单选题]带有雪橇型键槽且根部有适当圆角的双螺旋桨^{(double propellers)}轴或艉轴，其检验间隔期规定为（）。

A. 2年
B. 3年
C. 4年
D. 5年

[单选题]艉轴承密封装置油压试验是采用重力油柜润滑油，从泵油至回油连续（）min之内不准漏油。

A. 6
B. 5
C. 4
D. 3

[单选题]A level gauge for a tank is to （）.

A. give the pressure
B. give the contents
C. give the shape of the tank
D. give the accuracy level

[单选题]The engine will fail to start unless （）.

A. the pressure of the starting air is high enough
B. there is enough air in the air reservoirs
C. the air is supplied into the cylinders in the appropriate sequence
D. all of the above

[单选题]If you are unable to stop a diesel engine by any other means，you should（）.

A. discharge a CO2 extinguisher in the air inlet
B. pull off the distributor cap
C. secure the jacket water
D. secure the starting air supply valve

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