活塞杆填料函安装在气缸底板中心孔中，具有（）的作用。Ⅰ.密封扫

【名词&注释】

天然橡胶(natural rubber)、污水处理(wastewater treatment)、焚烧炉(incinerator)、填料函(stuffing box)、活塞杆填料、船舶防污染(pollution prevention of ships)、防污染设备

[单选题]活塞杆填料函安装在气缸底板中心孔中，具有（）的作用。Ⅰ.密封扫气空气；Ⅱ.密封燃气；Ⅲ.除油污；Ⅳ.除积炭；Ⅴ.分隔。

A. A．Ⅰ＋Ⅱ＋Ⅴ
B. B．Ⅰ＋Ⅴ
C. C．Ⅱ＋Ⅴ
D. D．Ⅰ＋Ⅲ＋Ⅴ

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学习资料：

[单选题]常用的船舶防污染^{(pollution prevention of ships)}设备有（）。

A. 油水分离装置
B. 焚烧炉
C. 生活污水处理装置
D. A+B+C

[单选题]橡胶艉轴承材料是由天然橡胶与矿物成分硫化加工制成，具有（）等优点。Ⅰ.耐热；Ⅱ.耐油；Ⅲ.弹性好；Ⅳ.吸振性好；Ⅴ.耐磨。

A. Ⅱ＋Ⅲ
B. Ⅰ＋Ⅱ＋Ⅳ＋Ⅴ
C. Ⅲ＋Ⅳ＋Ⅴ
D. Ⅱ＋Ⅲ＋Ⅳ

[单选题]A-frames and cylinder block is held together by （） to form a rigid structure.

A. connecting rods
B. piston rods
C. tie rods
D. jack-bolt

[单选题]Fuel oil is pumped by means of （） from the bunker tanks.

A. a transfer pump
B. a bilge pump
C. a service pump
D. a vacuum pum

[单选题]The cylinder and piston must be warmed up （） to a temperature of about 140 degF in standing by engine.

A. repeatedly
B. quickly
C. gradually
D. immediately

[单选题]If your propeller is racing in rough weather，you should（）.

A. decrease your engine speed
B. ignore it
C. increase your engine speed
D. stop your engine until the rough weather passe

[单选题]Most medium and slow speed diesels are started by what medium?（）

A. Electric starting motors
B. Hydraulics
C. Compressed air
D. Ether

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