电气工程专业英语试卷及参考答案

《电气工程专业英语》试卷一、根据英文单词，写出中文意义（20X0.5=10,共10分）

alternator 交流发电机

automation 自动控制，自动操作

bandwidth 带宽，频带宽度

built-in 内置的，固定的，嵌入的

capacitance 容量，电容

charge 负荷，电荷，费用，充电

coil 线圈

converter 转换器，变换器

diode 二极管

impedance 阻抗，全电阻

insulator 绝缘体

semiconductor 半导体

sensor 传感器

suppression 抑制

switch 开关，电闸

threshold 临界值

vacuum 真空，空间

vector 向量，矢量

waveform 波形

ammeter 电表

二、根据中文意义，写出英文单词（20X0.5=10,共10分）

n.近似值,接近,走近Approximation

n.能力，性能，容量Capability

v.补偿,偿还Compensate

n.损耗Depletion

adj.微分的Differential

n.打扰,干扰Disturbance

n.以太网Ethernet

n.频率, 周率Frequency

adj.不相容的, 矛盾的

n.隔绝, 绝缘

adj.瞬间的, 刹那间的Momentary

n.极性Polarity

n.转发器,中继器Repeater

n.排斥Repusion

n.阻力，电阻，阻抗Resistance

vt.模拟,模仿Simulate

n.晶体管Transistor

n.

传感器，发送器，传递器

n.阀

n.波长

三、根据英文词组，写出中文意义（30X0.5=15,共15分）

between…and在……之间

on the other hand 另一方面

take advantage of 利用

negative charge 负电荷

electric field 电场

free electron 自由电子

current flow 电流

sine wave 正弦波

Root-Mean-Square 均方根（值）

series circuit 串联电路

voltage drop 电压降

parallel circuit 并联电路

compound circuit s复合电路

parallel branch 并联分支

decimal system 十进制系统

programmable controller 可编程控制器

truth table 真值表

carbon brus 碳刷

permanent magnet 永久磁铁

armature field 电枢场

magnetic lines 磁力线

.

proportional system 比例系统 sampling period 采样周期 analog signal 模拟信号 baud rate 波特 discrete input 开关量输入 limit switch 限位开关 proximity switch 接近开关 industrial bus 工业总线 voltage difference

电压差

四、根据英文缩写，写出英文完整形式及中文意思（10X2=20,共20分）

PLC PPI CNC EIA RF FCC

CMOS VLSI CEMF

五、根据下列方框中所给的词填空（5X1=5,共5分）

Resistance in a material arises from the collision of electrons with the atoms and with each other as they move. The ___ 1、 collisions ___ produce heat, increasing the temperature of the material. Consider the ordinary toaster. Current flows through the ___2、wires ___ of the power cord and through the toaster's filament (the glowing wire you see inside). The same current must flow in the power cord as flows through the filament. The cord has very little ___ 3、resistance ___, while the filament has considerably more. Since the filament has a much higher resistance than the cord, it ___ 4、produces ___ much more heat. That's as it should be. You want the heat for your toast, but you do not want the power cord getting ___ 5、hot ___! The standard incandescent light bulb is another example. The filament in

the light bulb glows white hot (hence, the word "incandescent") to produce light and a lot of heat as well. But, the low-resistance power cord stays cool.

六、根据下列短文回答问题,回答请使用英文。（10X1=10,共10分）

Electric Potential

Electric potential is what drives current. You may know electric potential by another term that we will use ...voltage. This name comes from the unit of potential, which is the volt (denoted V). When you buy an AA battery, you are buying a device that provides a potential of 1.5 V between its positive and negative terminals. Your car battery maintains about 12 V between its terminals. And the potential between the two slots in a household electrical outlet is about 120 V . You are probably already familiar with a basic truth about electric potential. All other things being equal, a greater potential will create a greater current. But what is electric potential?

Water can provide a good analogy (although far from perfect!) for both current and potential. Consider a pipe that comes out of the bottom of a large tank of water. You open the spigot and water flows. The flow rate of the water is analogous to current. Common sense tells you that the higher the water level in the tank, the higher the flow rate in the pipe. The height of the water level is analagous to electric potential. A greater potential will cause a greater current.

Where this analogy fails is with the battery. The tank stores water and as the height slowly decreases, so does the water flow. A battery does not store charge! It is always electrically neutral and for whatever amount of charge leaves one terminal, an equal amount must come into the other. A battery is more analogous to the water pump. A battery, therefore, is an electron pump! It has the ability to push electrons directly proportional to its voltage rating. And, it does this through a chemical reaction. The battery becomes "discharged," (an unfortunately misleading term), when the chemicals in the battery are used up. Most batteries maintain a fixed potential until near the end of their life. The 120 V potential of a household outlet is produced in a very different way.

1. What is electric potential? What is another term people will use for it? Electric potential is what dives current. The term people will use is voltage.

2. What is the potential between the two slots in a household electrical outlet? The potential between the two slots in a household electrical outlet is a bout 120V .

3. What is the relationship between the potential and the current when all other things are equal? The greater the potential the greater the current.

4. What can be a good analogy (although far from perfect!) for both current and potential?