《 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 |
miconductor | 半导体 |
nsor | 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 |
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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 | Contradiction |
n.隔绝, 绝缘 | Isolation |
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 | Transmitter |
n.阀 | Valve |
n.波长 | Wavelength |
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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） |
ries circuit | 串联电路 |
voltage drop | 电压降 |
parallel circuit | 并联电路 |
compound circuits | 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 |
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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 saab的成语
witch | 限位开关 |
proximity switch | 接近开关 |
industrial bus | 工业总线 |
voltage difference | 电压差 |
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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）
| 英文完整形式 | 中文意思 |
PLC | Programmable logic controller | 可编程逻辑控制器 |
PPI | Point-to-point interface | 点一点接口 |
CNC | Computerized numerical control | 计算机数值控制 |
EIA | Electronic industries association | 电子工业联合会 |
RF | Radio frequency | 射频，无线电频率 |
FCC | Federal communications commission | （美国）通信委员会 |
CMOS | Complementary metal-oxide-miconductor transistor | 互补金属氧化物半导体 |
MOSFET | Metallic oxide miconductor field effect transistor | 金属氧化物半导体场效应晶体管 |
VLSI | Very large scale integration | 超大规模集成电路 |
CEMF | Counter electro motive force | 反电动势 |
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五、根据下列方框中所给的词填空（5X1=5,共5分）
wires current resistance heat cool produces collisions hot |
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Resistance in a material aris 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 e 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-re
sistance 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 u ...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 houhold 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 n 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 cau a greater current.
Where this analogy fails is with the battery. The tank stores water and as the height slowly decreas, 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 ud up. Most batteries maintain a fixed potential until near the end of their life. The 120 V potential of a houhold outlet is produced in a very different way.
1. What is electric potential? What is another term people will u for it?
Electric potential is what dives current. The term people will u is voltage.
2. What is the potential between the two slots in a houhold electrical outlet?
The potential between the two slots in a houhold 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? Water.
5. What is analogous to current?
The flowrate of the water is analogous to current.
6. What is analagous to electric potential?
The height of the waterlevel is analogous to electric potential.
7. What is more analogous to the water pump?
A battery is more analogous to the water pump.
8. What is a battery?
A battery is an electron pump.
