对于活塞杆下端是方形法兰的机型如B&W，吊缸时，整个填料函

【名词&注释】

冷却水(cooling water)、活塞环(piston ring)、曲轴箱(crankcase)、填料函(stuffing box)、活塞杆(piston rod)、超负荷(overload)、柴油机气缸套(engine cylinder liner)、轮机员(engineer)、面粗糙度(surface roughness)

[单选题]对于活塞杆下端是方形法兰的机型如B&W，吊缸时，整个填料函必须随同活塞杆一起吊出去，操作时轮机员^(engineer)只要在（）内拆掉填料函的（）固定螺栓。

A. 扫气箱/内圈
B. 曲轴箱/外圈
C. 扫气箱/外圈
D. 曲轴箱/内圈

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学习资料：

[单选题]由于（）等操作管理不当引起气缸盖发生疲劳裂纹。

A. A．冷车起动或起动后立即加速
B. B．冷却水腔积垢严重
C. C．超负荷
D. D．气缸盖螺栓预紧力过大

[单选题]除工艺原因外，柴油机气缸套^{(engine cylinder liner)}与活塞环工作表面间油膜变薄或遭到破坏，是由于（）等因素造成。Ⅰ.润滑不良；Ⅱ.活塞运动装置对中不良；Ⅲ.冷却不良；Ⅳ.超负荷；Ⅴ.工作表面粗糙度^{(surface roughness)}低。

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

[单选题]（） supplies pilot air to control the cylinder air start valves.

A. An air compressor
B. An indicator cock
C. An air distributor
D. A safety valve

[单选题]Since the burning or combustion takes place within the engine itself, the engine is known as （）.

A. a fire -tube boiler
B. an internal combustion engine
C. an external combustion engine
D. an internal combustion generator

[单选题]The withdrawing of the cylinder liners, in general, depends on their （）.This may amount to approximately 1/120 of the diameter in some engines.

A. correct maneuvering
B. wear
C. working efficiency
D. maintenance

[单选题]Which of the two events listed occurs simultaneously in a two-stroke/cycle diesel engine?（）

A. Exhaust and scavenging
B. Scavenging and compression
C. Ignition and expansion
D. Exhaust and compressio

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