专业英语-学习指南
一． 根据下面的英文解释，写出相应的英文词汇。
1. that is a material or covering which electricity, heat or sound cannot go through _________
2. that allow electricity or heat to go through ________
3. the standard unit of measurement for the strength of an electrical current _________
4. of or relating to magnetism or magnets _________
5. a unit of potential difference equal to one thousandth of a volt _________
6. a number written using the base 10; numerical _________
7. something, such as a machine or an engine, that produces or imparts motion _________
8. the act of disturbing _________
9. an integrated circuit that contains the entire central processing unit of a computer on a single chip _________
10. a procedure for solving a problem that involves collection of data, processing, and presentation of results _________
11. the standard measure of electrical power ____________
12. an electric generator that produces alternating current __________ 13. two pieces of wire were connected end to end ____________ 14. two pieces of wire were connected side by side ____________ 15. the standard unit of measurement for strength of an electrical current ____________
16. a device used to break or open an electric circuit or to divert current from one conductor to another ____________
17. a device that generates light, heat, or therapeutic radiation ____________
18. a material that insulates, especially a nonconductor of sound, heat, or electricity ____________
19. of or relating to a system of numeration having 2 as its base ____________
20. the standard unit of electrical resistance ____________ 21. a number written using the base 10; numerical _________
22. something, such as a machine or an engine, that produces or imparts motion _________
23. the act of disturbing _________ 24. an integrated circuit that contains the entire central processing unit of a computer on a single chip _________
25. a procedure for solving a problem that involves collection of data, processing, and presentation of results _________
26. that is a material or covering which electricity, heat or sound cannot
go through _________
27. that allow electricity or heat to go through ________
28. the standard unit of measurement for the strength of an electrical current _________
29. of or relating to magnetism or magnets _________
30. a unit of potential difference equal to one thousandth of a volt _________
二. 根据电气工程专业基本知识，判断正误。
1. PID controller is a very useful controller in industry. _____ 2. A digital computer controlled system is only designed for discrete variable. _____
3. Most programmers today prefer to use high-level languages, such as C++, Java, COBOL, and Visual Basic. _____
4. An output device, such as a keyboard or mouse, gathers input and transforms it into a series of electronic signals for the computer. _____ 5. When three capacitors connected in parallel, . _____
6. Electron will flow through a conductor from the positive terminal to the negative terminal. _____
7. For example, if the effective value is 110V, the peak value is 220V. _____
8. If a conductor cuts through lines of flux, the voltage in the conductor is caused. _____
9. Whenever a conductor cuts through lines of flux a voltage is induced in the conductor. The voltage is CEMF (Counter Electromotive Force). _____
10. In China alternating current is usually generated at 60Hz. _____
11. In alternating current an AC generator is used to make electrons flow continuously in one direction. _____
12. In North American 50Hz is adopted as standard frequency in electric power system. _____
13. A computer’s microprocessor only understands high-level language. _____
14. Instructions written in a high-level language must be translated into machine language in binary form before a computer can use them. _____ 15. In alternating current an AC generator is used to make electrons flow continuously in one direction. _____
16. In China alternating current is usually generated at 60Hz. _____ 17. The north pole of the armature is attracted to the south pole of the main field. The south pole of the armature is attracted to the north pole of the main field. _____
18. When three capacitors connected in series, Ctotal?C1?C2?C3. _____ 19. The commutator can change current direction in the conductor. _____
20. Most computers are equipped with a keyboard as the primary output device. _____
21. Electron will flow through a conductor from the positive terminal to the negative terminal. _____
22. For example, if the effective value is 110V, the peak value is 220V. _____ 23. If a conductor cuts through lines of flux, the voltage in the conductor is caused. _____
24. Whenever a conductor cuts through lines of flux a voltage is induced in the conductor. The voltage is CEMF (Counter Electromotive Force). _____
25. PID controller is a very useful controller in industry. _____ 26. A digital computer controlled system is only designed for discrete variable. _____
27. Most programmers today prefer to use high-level languages, such as C++, Java, COBOL, and Visual Basic. _____
28. An output device, such as a keyboard or mouse, gathers input and transforms it into a series of electronic signals for the computer. _____ 29. When three capacitors connected in parallel,
Ctotal?1/???1/C1???1/C2???1/Cn?????. _____
30. In China alternating current is usually generated at 60Hz. _____
三. 基本词汇的英汉互译。
1. 电能转换器 ______________ 2. ___________ load resistance
3. 理想电压源 ______________ 4. ______________ internal resistance 5. 转子 ______________ 6. ______________ semiconductor 7. 运算放大器 ______________
8. ______________ distributed winding 9. 同步发电机 ______________
10. ______________ reactive power compensation 11. ____________ rated armature current 12. 理想电源 ____________
13. ____________ circuit parameters 14. 周期电流 ____________
15. ____________ negative feedback
16. 直轴 ____________ 17. 有功电流分量 ____________
18. ____________ reactive current current 19. 电网 ____________ 20. ____________ digital relays 21. 运算放大器 ______________
22. ______________ distributed winding 23. 同步发电机 ______________
24. ______________ reactive power compensation 25. 电能转换器 ______________ 26. ___________ load resistance
27. 理想电压源 ______________ 28. ______________ internal resistance 29. 转子 ______________ 30. ______________ semiconductor
四. 根据电气工程基本知识，完成填空。 1. Resistors are _____ elements.
A. passive B. active
C. independent sources D. dependent sources
2. An electric heater draws 10 A from a 120V line. The resistance of the heater is _____.
A. 1200? B. 120? C. 12? D. 1.2?
3. The algebraic sum of all voltages around a loop is _____. A. zero B. indefinite value
C. sum of voltage rises D. sum of voltage drops 4. ON-OFF information can be represented by _____ signal. A. a digital B. an analog C. a discrete D. a control
5. The process quantizing the continuous values into a binary scale is called _____.
A. digital-to-analog conversion B. digital-to-digital conversion C. analog-to-digital conversion D. analog-to-analog conversion
6. The wide application of operational amplifiers lies in advantage of using _____.
A. positive feedback networks B. large open-circuit gain
C. negative feedback networks D. small output impedance
7. When an induction motor with 10 poles is supplied by 50Hz three-phase ac power source, the synchronous revolutions per minute is _____. (Synchronous r/min = 120 f/p)
A. 1000 B. 900 C. 700 D. 600
8. The electric machine that operates at speeds above synchronous speed works in _____ region.
A. motoring B. generating C. plugging D. stopping
9. A transformer is a device that can convert one ac voltage to another ac voltage through the action of _____.
A. an electric circuit B. a magnetic field C. an electric field D. a coupling circuit 10. The primary winding is connected to _____.
A. the power source B. the load C. the measurement instrument D. the motor
11. Copper losses are _____ losses in the primary and secondary windings of the transformer core.
A. inductive B. capacitive C. resistive D. reactive
12. _____ can provide an asynchronous link between two ac electric power system with different nominal frequencies.
A. The HVDC (high voltage DC) transmission
B. The EHV (extra-high voltage) AC transmission C. The AC distribution D. Generators
13. The generator voltages are usually stepped up to the transmission voltage level by _____.
A. series capacitor B. parallel reactors
C. step-up transformers D. step-down transformers
14. The objective of the optimal economic operation of power systems is _____.
A. to minimize the total production cost B. to maintain frequency constant C. to maintain voltages constant
D. to ensure balance between generation and load 15. Any protection scheme consists basically of _____. A. two elements B. three elements C. four elements D. five elements
16. The protective scheme that senses zero sequence current and operates as necessary is called as _____.
A. overcurrent protection B. zero sequence protection C. negative sequence protection D. directional protection 17. The distance protection is applied to protect _____. A. transformers B. generators C. transmission lines D. buses
18. The thermal energy of the steam is converted into _____ energy by the turbine.
A. electrical B. mechanical C. chemical D. potential 19. _____ is used as coolant in light-water reactors.
A. Gas B. Organic compound C. Molten salt D. Water