液压拉伸器的液压系统中除应使用纯净的液压油外，还可使用（）作

【名词&注释】

可靠性(reliability)、润滑油(lubricating oil)、环境温度(ambient temperature)、液压油(hydraulic oil)、静平衡(static balance)、轻柴油(light diesel oil)、螺旋桨桨叶(propeller blades)

[单选题]液压拉伸器的液压系统中除应使用纯净的液压油外，还可使用（）作为液压油。

A. 润滑油
B. 轻柴油^{(light diesel oil)}
C. 透平油
D. 高级润滑油

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学习资料：

[单选题]可靠性定义中所述及的“规定的条件”，包括（）。Ⅰ.环境温度、压力、湿度；Ⅱ.振动；Ⅲ.承受的负荷

A. Ⅰ+Ⅱ
B. Ⅱ+Ⅲ
C. Ⅰ+Ⅲ
D. Ⅰ+Ⅱ+Ⅲ

[单选题]除镍铝青铜桨外，其他材料的螺旋桨桨叶^{(propeller blades)}热校正之后应进行（）处理。

A. 着色探伤
B. 静平衡
C. 退火
D. 清洁

[单选题]舵杆常见的失效形式中不包括（）。

A. 轴颈磨损
B. 表面腐蚀与裂纹
C. 变形
D. 折断

[单选题]（） is used for washing and drinking.

A. The ballast system
B. The salt water system
C. The bilge system
D. The domestic system

[单选题]Diesel engines are started by supplying （） into the cylinders in the appropriate sequence for the required direction.

A. cooling water
B. compressing air
C. compressed air
D. cylinder oil

[单选题]Lubricating oil for an engine is stored at the bottom of the （）, known as the sump or in a drain tank located beneath the engine.

A. sea cheat
B. air receiver
C. crankcase
D. water box

[单选题]The successful operation of any engine or machine and （） depend on effective lubrication.

A. their no trouble period
B. their freely trouble period
C. its free trouble life
D. its trouble-free life

[单选题]Which of the following devices is common to both mechanical and hydraulic governors?（）

A. Direct linkage between the ball-head and fuel rack
B. A servomotor
C. A compensating device
D. Flyweight

[单选题]What is an advantage of a steam turbine over a diesel for the main propulsion?（）

A. Faster response from ahead to astern
B. Less fuel consumption
C. Cheaper initial installation cost
D. Less weight per unit of horsepower

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