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1、共 3 页第 1 页-兰州石化职业技术学院试卷兰州石化职业技术学院试卷科 目： 专业英语适用班级： 机电一体化本科班考试时间： 考试方式：开卷题 号一二三四五六七八总 分成 绩Part Translate the following phrases: (20 %)1. 内力2. 正应力3. 冷加工4. 不锈钢5. 临界温度6. 公称尺寸7. 铁合金8. 离心泵9. 直流电机10. 加工中心11. automatic lathe12. commercialized software13. nonferrous metals14. corrosion resistance15. propertie
2、s of materials 16. electric discharge machining17. numerical control18. absolute positioning19. hydraulic power drive20. servo motor Part Fill in the blanks according to the passages we have learned： (10 %)1. The ability to support weight without bending or breaking is 2. Tolerance may be either or
3、.3. is a process that is similar to planning wood with a carpenters plane.4. can machine a piece of metal with a tool which has multiple rotating cutting edges.5. The most common used cutting tools used on lathe are , , .6. Among hydraulic, pneumatic and electric drive machines, model is usually the
4、 most expensive, model is often the least expensive, and model is the most applicable for presion jobs.7. There are two types of control systems on CNC machines: open-looped and control systems.8. The is capable of storing a number of preset tools which can be automatically called for use by the par
5、t program.9. The simple example of PTP system is machine.Part Complete the following sentences by translating the Chinese in the brackets into English. (10 %)1. Since these materials generate , they are most suitable for measuring force-derived variables. （一个与施加力成比例的输出电荷）2. These employ of a coil mo
6、ving in a magnetic field. (一个广为人知的发电机原理)3. , because of the small size of thermocouple . （局部点的温度可以被测定）4. A transducer is a device which an optical, mechanical, or more commonly-electrical signal. （把被测量转换为）试卷类型A 卷考 场班 级姓 名学 号注意事项： 1、考生要正确 清楚的填写以上 栏目。 2、如因填写错 误、不清楚等造 成不良后果者， 由考生本人负责。装订线试卷编号考试日期印刷份数共 3
7、 页第 2 页5. Transduces are classified according to . (转换原理和测量形式) Part Answer the following questions briefly. (10 %)1. The properties of metal can be classified into three categories, what are they?2. What are the five basic techniques of machining metal?3. How many categories can numerial control mac
8、hines be generally classified according to power drives? And what are they?4. What is tolerance?5. Compared with conventional machines, what are the disadvantages of CNC machines? Part Translate the following paragraphs into Chinese : (40 %) 1. Steel is an alloy of iron and carbon that is widely use
9、d in industrial production. Its property of hardening when suddenly cooled from a heated condition has been known for many centuries. This field about metal is heat treatment. It changes the structures of metals by the application of heat and obtains the desired mechanical properties.2. Machining ce
10、nters are NC machines that are capable of performing a number of different machining processes at a time. A machining center has a tool magazine in which many tools are held. Tool changes are automatically carried out., and so are functions such as coolant on or off. Machining centers are, therefore
11、, highly versatile and are employed to perform a number of machining operations on workpiece with a single setup. Parts having intricate shapes can easily be produced with high accuracy and excellent repeatability.3. Boring and internal turning are performed on the internal surfaces by a boring bar
12、or suitable internal tools. If the initial workpiece is solid, a drilling operation must be performed first. The drilling tool is held in the tailstock, and the latter is then fed against the workpiece.4. Turning is a type of metal processing operation where a cutting tool is usedto remove an unwant
13、ed material to produce a desired product, and isgenerally performed on lathe. The lather, as the turning machine iscommonly called is the father of all machine tools. The piece of metal bemachined is rotated and the cutting tool is advanced against it.5. For many years a hydraulic system was conside
14、red the result of plumbing together a number of components. Also, a hydraulic system has been considered merely the source of power for control servos. Each of these试卷类型A、B 卷考 场班 级姓 名学 号注意事项： 1、考生要正确 清楚的填写以上 栏目。 2、如因填写错 误、不清楚等造 成不良后果者， 由考生本人负责。装订线试卷编号考试日期印刷份数共 3 页第 3 页concepts can lead to basic errors. Following either of these guidelines can result in systems, which are inadequate, unstable, or a combination of the two.6. NC electric discharge shaped machining machine is a kind of high- precision automatic machining machine.
