西安交通大学14年6月课程考试《专业英语》考查课试题

?西安交通大学14年6月课程考试《专业英语》考查课试题




一、其他题（共 5 道试题，共 70 分。）

1.
1. the standard measure of electrical power ____________
2. an electric generator that produces alternating current __________
3. two pieces of wire were connected end to end ____________
4. two pieces of wire were connected side by side ____________
5. the standard unit of measurement for strength of an electrical current
____________
6. a device used to break or open an electric circuit or to divert current from one conductor to another ____________
7. a device that generates light, heat, or therapeutic radiation
____________
8. a material that insulates, especially a nonconductor of sound, heat, or electricity ____________
9. of or relating to a system of numeration having 2 as its base
____________
10. the standard unit of electrical resistance ____________





2.
我们将大规模发展电力工业。
2. 这台发动机一直运转良好。
3. 电流在电路中流动的速度是非常快的。
4. 如果使用变压器，低电压的电力就能转换成高电压的电力。
5. 这一现象我们称之为电磁感应。





3.
基本词汇的英汉互译。（共15分，每题1.5分）

1. 运算放大器 ______________
2. ______________ distributed winding
3. 同步发电机 ______________
4. ______________ reactive power compensation
5. 电能转换器 ______________
6. ___________ load resistance
7. 理想电压源 ______________
8. ______________ internal resistance
9. 转子 ______________
10. ______________ semiconductor





4.
根据电气工程专业基本知识，判断正误。（共10分，每空1分）
1. Electron will flow through a conductor from the positive terminal to the negative terminal. _____
2. For example, if the effective value is 110V, the peak value is 220V.
_____
3. If a conductor cuts through lines of flux, the voltage in the conductor is caused. _____
4. Whenever a conductor cuts through lines of flux a voltage is induced in the conductor. The voltage is CEMF (Counter Electromotive Force).____
5. PID controller is a very useful controller in industry. _____
6. A digital computer controlled system is only designed for discrete variable. _____
7. Most programmers today prefer to use high-level languages, such as C++, Java, COBOL, and Visual Basic. _____
8. An output device, such as a keyboard or mouse, gathers input and transforms it into a series of electronic signals for the computer.
_____
9. When three capacitors connected in parallel, . _____
10. In China alternating current is usually gener

ated at 60Hz. __




5.
将下列句子翻译为英文。（共15分，每题3分）
1. 我们把这些物质称为导体。
2. 有两种不同的电荷：正电荷和负电荷。
3. 电流会使导线发热。
4. 电使得收音机工作。
5. 铜允许电流容易地流过它。







二、单选题（共 30 道试题，共 30 分。）

1. In the root-locus method the actual time response of a system can be obtained by means of _____.
A. the inverse Fourier transform
B. the inverse Laplace transform
C. the Fourier transform
D. the Laplace transform
正确答案：
2. The distance protection is applied to protect _____.
A. transformers
B. generators
C. transmission lines
D. buses
正确答案：
3. _____ that connects at least two networks makes decision about the best route for data.
A. A modem
B. A network card
C. A hub
D. A router（路由器）
正确答案：
4. Copper losses are _____ losses in the primary and secondary windings of the transformer core.
A. inductive
B. capacitive
C. resistive
D. reactive
正确答案：
5. 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
正确答案：
6. In North American _____ is adopted as standard frequency in electric power system.
A. 25Hz
B. 50Hz
C. 60Hz
D. 125Hz
正确答案：
7. 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
正确答案：
8. The relation results in _____.
A. null
B. identity
C. indefinite value
D. zero
正确答案：
9. Image clarity on a computer screen is measured with _____.
A. screen size
B. dot pitch
C. resolution
D. color depth
正确答案：
10. The hydropower is well suited for switching according to _____ command to meet changing power needs.
A. a consumer’s
B. a user’s
C. a dispatcher’s
D. an operator’s
正确答案：
11. A computer’s microprocessor only understands _____ in binary form.
A. high-level languages
B. machine language
C. human languages
D. assembly language
正确答案：
12. An expansion slot is a long, narrow socket on the motherboard into which you can plug _____.
A. an expansion card
B. a modem
C. a network card
D. a sound card
正确答案：
13.
1
A.
B.
C.
D.
正确答案：
14. _____ 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
正确答案：
15. The electric machine that operates at speeds above synchronous speed works in _____ region.
A. motoring
B. generating
C. plugging
D. stopping
正确答案：
16. The Buck（降压

式变换器） is a _____ converter.
A. voltage step-up
B. current step-down
C. current step-up
D. resistance
正确答案：
17. 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?
正确答案：
18. The overall transfer function is the ratio of the transform of the controlled variable to the transform of _____.
A. the controlled variable
B. the reference input
C. the feedback
D. the output variable
正确答案：
19. 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
正确答案：
20. The system’s characteristic equation can be used to determine _____ of a linear time-invariant system.
A. the stability
B. magnitude of the steady-state error
C. the controllability
D. the observability
正确答案：
21. 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
正确答案：
22.
In a coal-fired power plant, an electrostatic precipitator is used to remove _____ from the combustion gases.



A. solid particle
B. SO2
C. CO
D. water vapour
正确答案：
23. Resistors are _____ elements.
A. passive
B. active
C. independent sources
D. dependent sources
正确答案：
24. 1
A.
B.
C.
D.
正确答案：
25. Data stored in RAM _____ when the power of the computer is turned off.
A. is held permanently
B. permanently disappears
C. is held temporarily
D. temporarilydisappears
正确答案：
26. ON-OFF information can be represented by _____ signal.
A. a digital
B. an analog
C. a discrete
D. a control
正确答案：
27. In the form of _____ the output is continuously fed back and compared with the reference input.
A. continuous control
B. discontinuous control
C. discrete-data control
D. sampled-data control
正确答案：
28. 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
正确答案：
29. 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?
正确答案：
30. The precision of ADC ( analog-to-digital conversion ) is determined by _____.
A. its speed
B. its gain
C. the accuracy of the reference voltage
D. the number of binary bits
正确答案：