轮机英语教学课件(06) Purification of Fuel Oils

1171. When a clarifier is running the impurities and water collect at the bowl ____.
A. center B. periphery C. inlet D. upper parts
1173. For a purifier, changing to a gravity disc with larger hole diameter will move the interface towards the ___ .
A. bowl periphery B. bowl center
C. upper surface D. lower surface
1174. For a purifier changing to a gravity disc with smaller hole diameter will move the interface towards the ___ .
sentences
Failure of any cleaning equipment could cause very serious troubles to the mechanical parts of the fuel injection equipment, therefore standby duplicate cleaning equipment must be provided and so arranged that continuous operation can be maintained should the working unit fail. 任何清洁设备失效都会引起燃油喷射设备机械部件的严重故障。因 此，必须设有同样的燃油清洁设备备用，以便于万一设备发生故障 时仍能维持连续运行。 It is important to note that when an excessive amount of water is present in the fuel the temperature for centrifuging must be kept below the boiling point of water, otherwise foaming and agitation of the fuel takes place. 当油中有大量水的时候，必须特别注意，（加热）温度应在水的沸 点以下，否则油会起泡且混浊。
1169.A centrifuge arranged to separate two liquids is known as ____. A. an oily water separator B. a purifier C. a centrifugal compressor D. a clarifier
16. gravity ring 比重环 17. clarifier bowl 分离筒 18. result from 由于……原因 / result in 导致……结果 19. two-stage centrifuge treatment 两级分离处理 20. oil purifying techniques 燃油净化技术 21. single phase purifier 单级分油机 22. flood alarm 溢油警报 23. self-cleaning purifier 自动排渣分油机 24. a time consuming job 一项费时的工作 25. routine maintenance 常规维养 26. recommended time 规定的时间 27. to reach a certain point 达到一定的程度 28. unmanned machinery space （UMS） 无人机舱 29. come into operation 投入使用 30. sequential regulating device 程序控制装置 31. audio-visual alarm system 声光报警系统 32. fuel recycling valve 燃油循环阀 33. constant pressure control valve 定压控制阀
Focus
1. some proper nouns 2. the working principle of oil purification and the components 3. the sequence of oil purification
Analysis of the long and difficult
Lesson 6 Purification of Fuel Oils
1.Vocabulary 2.Focus 3. Analtences 4. Some choices related to competency
test
Purifier
Vocabulary
A. purifier B. separator C. filter D. clarifier
9. ___ fuel oils ___ lubricating oils require treatment before passing to the engine. A. Both\and B. Neither\nor C. Either\or D. Both\or
A. bowl periphery B. bowl center
C. upper surface D. lower surface
1353.The removal of ___ from lubricating oil will reduce engine wear and possible breakdowns. A. contaminating water B. contaminated additives C. contaminated fuel D. contaminating impurities
IV. Some choices related to the competency test
672,9,1169,1171,1173,1174,1353,1355
672. When a centrifuge is arranged to separate impurities and small amount of water from oil, it is known as a ____.
1355. The position of the interface between oil and water within the centrifuge is achieved by the use of ____.
A. gravity disc B. centrifugal bowl
C. a stack of discs D. main sealing ring
1. vary in （在……方面）有所不同 2. chemical composition 化学组成 3. insoluble impurities 不溶性杂质 4. foreign matter 外来物质 5. to a great degree 很大程度上 6. by centrifugal and filtration treatment 经过离心和过滤处理 7. the basic principle of operation 基本操作原理 8. be…in shape 呈……形状 9. stainless steel 不锈钢 10. a series of 一系列的 11. centrifugal force 离心力 12. cylindrical interface 圆柱形分界面 13. sludge space 淤渣空间 14. at regular intervals 定期地 15. specific gravity 比重