电子技工英语题库
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F=(不化简)化简后为F=(不化简)化简后为成都市高级技工学校电子实训理论试题(考试时间120分钟)班级________________ 姓名________________一、填空题(每空1分,共20分)1.数制转换:(101101)2=(____)10 =(____)16;(27E)16=(____________)2;(793)10=(_________________)8421BCD。
2. 写出下列逻辑图的逻辑关系式:3. 电路如图所示①该电路是二极管____门电路;②当UA=3V,UB=0V时,UF=____V(忽略二极管正向导通压降)4. 数字万用表测电阻及二极管时,红表笔与表内电池_____极相连,黑表笔与____极相连。
5. 三极管中掺杂浓度最大的是________区,最小的是________区,正向导通压降略大的是________结。
6. 为了准确测量电压,应选用内阻________的电压表;为了准确测量电流,应选用内阻________的电流表。
7.NPN三极管处于放大状态时各管脚电压:_________>_______>________。
二.判断题(每题1分共10分)()1、交流电源的零线不能接熔断器。
()2、发光二极管属于硅管,正向导通压降约为0.7V.。
()3、并联容量适当的电容可提高感性负载的功率因数。
()4、同样阻值的电阻因耗散功率不同有多种规格,其耗散功率越大,使用时就更耗电。
()5、指针式万用表置于欧姆档时,其红表笔带正电。
()6、正弦振荡电路是一个没有输入信号的带选频网络的负反馈放大电路。
()7、放大电路的三种组态都有电压放大作用。
()8、OC与非门的输出端可以并联运行,实现“线与”关系,即L=L1+L2。
()9、保险库有一把锁,A、B两名经理各有一把钥匙,必须两名经理同时在才能开锁。
用F表示打开保险库锁的状态,F的逻辑表达式为:BAF+=。
()10、CMOS门电路中输入端可以悬空不处理。
海南省高级技工学校《电子技术基础》小考试题考试时间:年月日考核方式:闭卷时间:100分钟姓名:班级:学号:分数一、填空题(每空0.5分,共10分)1、PN结具有_ 特性,即加正向电压时PN结_ ,加反向电压时PN结_ 。
2.硅三极管发射结的死区电压约 V,锗三极管发射结的死区电压约V。
3.晶体三极管处在正常放大状态时,硅管发射结的导通电压约 V,锗管发射结的导通电压约 V。
4.放大电路按三极管连接方式可分为 _、_和。
5、三极管工作在放大状态时。
其_ 结必反偏,其_ 结必正偏,集电极电流与基极的电流关系是6.晶体三极管有三个电极,即极、极和极7、放大电路设置静态工作点的目的是。
8、多级放大电路中每级放大电路的电压放大倍数分别为AU1、AU2…、AUn总电压放大倍数AU=9、负反馈放大器是由电路和电路组成。
二、单项选择题(每题1分,共30分)1、最常用的半导体材料是()A.铜、B.铁C.硅和锗D.铝2、半导体具有()特性、()特性和()特性。
A、单向导电性、导通、截止B、放大、饱和、截止C、热敏光敏掺杂3.二极管的正向接法是二极管的()极接电源的正极,()极接电源的负极,反向接法时相反。
A、正、负B、阴、阳C、负、正4.变容二极管在高频收音机的自动频率控制电路中,通过改变其()来自动调节本机振荡频率。
A正向偏置电压 B、反向偏置电压 C、触发电压5、当硅二极管加上0.4V正向电压时,该二极管相当于()A.很小的电阻B. 很大的电阻C.短路D.电阻6、交通灯采用的是()管。
A.发光二极管B.光电二级管C.变容二极管D.整流二极管b7、三极管放大的实质()。
A.将小能量换成大能量B.将低电压放大成高电压C.将小电流放大成大电流D.用较小的电流控制较大的电流8.某晶体三极管,如果基极电流I B增大到时50μA,I C增加到2mA,三极管的电流入大系数β等于()。
A、25B、100C、409、满足Ic=βIB关系时,三极管工作在()。
中级技工理论复习题试卷及答案单选题基本信息:[矩阵文本题] *1、根据《汽车驱动桥修理技术条件》技术要求,圆锥主动齿轮、从动齿轮接触痕迹的长不小于齿长的()。
[单选题] *A.50%B.60%C 70%D.75%(正确答案)2、前驱动轿车的半轴上均安装万向节。
() [单选题] *A.普通B.十字轴C.准等速(正确答案)D.等速3、根据《汽车驱动桥修理技术条件》技术要求,驱动桥钢板弹簧座减少不大于2.0mm.() [单选题] *A普通B宽度(正确答案)C厚度D粗糙度4、当传动轴中间支承的轴向间隙大于mm时,应解体中间支承总成() [单选题] *A.0.1(正确答案)B.0.3C.0.5D.0.75、当作用力很容易地由方向盘经转向器传到转向摇臂,而转向摇臂所受路面冲击也比较容易地经转向器传到方向盘,这种转向器被称为--转向器。
() [单选题] *A.可逆式(正确答案)B.不可道式C.极限可逆式D.齿轮条式6、国家检验标准规定最高车速小于100kmh的汽车转向盘向左向右的自由转角不得大于()。
[单选题] *A.30°B.40°C.15°(正确答案)D.35°7、汽车的装配基体是()。
[单选题] *A.车架(正确答案)B.车身C.车轮D.车梁8、桑塔纳2000型轿车前悬架采用()。
[单选题] *A.双叉式B.撑杆式(正确答案)C.拖动臂式D.非独立式9、拆下减振器,双手紧握减振器的两端,缓缓拉伸和压缩,感觉阻力的大小甲说:如果快速拉伸和压缩,阻力明显减小,说明减振器的减振性能良好,乙说:如果快速拉伸和压缩,阻力依然如故,说明减振器的减振性能已损坏。
以上说法正确的是()。
[单选题] *A.甲B.乙(正确答案)C.二者都正确D.二者都不正确10、东风EQ1092型汽车的前束值为___mm。
() [单选题] *A.3~5B.1~5(正确答案)C.5~6D.4~611、真空增压制动传动装置比液压制动机构多装了一套真空增压系统,下列选项中不是真空增压系统组成部分的是()。
新职业英语单词试题答案一、选择题1. 以下哪个单词表示的是在社交媒体上进行内容创作和推广的职业?A. Social Media ManagerB. Content CreatorC. InfluencerD. Digital Marketer答案:A. Social Media Manager2. 信息技术行业中,负责开发和测试软件程序的工程师通常被称为什么?A. Software DeveloperB. Systems AnalystC. Quality Assurance AnalystD. Database Administrator答案:A. Software Developer3. 在电子商务领域,负责管理和优化在线商店的人被称为什么?A. E-commerce SpecialistB. Online RetailerC. Digital Store ManagerD. Web Merchant答案:A. E-commerce Specialist4. 负责设计和规划城市交通系统以提高效率和可持续性的职业是什么?A. Urban PlannerB. Traffic EngineerC. Transportation PlannerD. City Designer答案:C. Transportation Planner5. 随着环保意识的提升,专注于环境保护和可持续发展的职业被称为什么?A. Environmental ScientistB. Sustainability SpecialistC. Green Energy ConsultantD. Eco-friendly Designer答案:B. Sustainability Specialist二、填空题1. 负责通过网络平台进行教学活动的教育工作者被称为________。
答案:Online Tutor2. 使用计算机图形和动画软件创造视觉效果的专业人士被称为________。
理解与表达技工院校答案1.“谁污染谁买单”制度并不需要苦心孤诣的原创性设计,国际上已有先例可循。
从上个世纪七八十年代开始,德国就开始建立“污染者买单”的法律框架,对各类企业产生的垃圾、废水、废气以及各种可能发生的环境损害,制定了严格、规范的收费政策,并形成了流畅的回收再利用流程。
生产废物一律不能直接丢弃,必须由专门的公司回收处理,企业要按量支付高额的处理费用。
这既刺激了各种与工业污染有关的环境技术的蓬勃发展,又倒逼企业不断吸纳环保技术,持续优化产业结构,还使得社会投资自动趋向高新环保产业。
这种绿色循环经济模式已经为多个国家跟进,并为后发者提供了成熟的范本。
这段文字意在说明()。
[单选题] *A.国外已有成熟的绿色循环经济模式可供借鉴(正确答案)B.“谁污染谁买单”制度需完备的法律框架C.高额的污染成本能刺激环保技术的发展D.高新环保产业是社会投资的必然趋势答案解析:答案:A。
这是一道中心理解题。
文段首先指出“谁污染谁买单”在国际上是有迹可循的,然后以德国为例,详细介绍了德国在这方面的具体做法和经验。
接下来肯定了德国这种模式的价值。
最后,代词“这”强调绿色循环经济模式为后发者提供了成熟的范本。
结合首句“国际上有先例”和尾句“这种模式提供了成熟范本”可知文段的中心意思是在阐述国外绿色循环经济模式的借鉴作用,A项忠于原文,为正确答案。
B项,“法律框架”是例子中的表述,并非文段的重点,同时根据“上世纪七八十年代开始,德国就开始建立‘污染者’买单的法律框架”,说明文段已经强调了德国有法律框架,因此不需要再制定完备的法律框架,应排除。
C项,是关于例子的表述,并非文段的重点,应排除。
D项,“必然趋势”无法得知,属于无中生有,应排除。
因此本题选A。
2.在社会矛盾冲突中,富人的财富使得他们总是占据优势地位,富人可以把某些议题排除在社会讨论之外。
穷人在政治竞争过程中的持续性挫败,使得他们自己也不相信参与政治能够维护自身利益。
中级技工考核试题及答案一、选择题(每题5分,共25分)1. 下列哪种材料属于金属材料?(A)A. 铁B. 塑料C. 玻璃D. 木材2. 在电路中,正极通常标记为(B)。
A. 红色B. 蓝色C. 绿色D. 黑色3. 下列哪种工具用于切割金属板?(A)A. 电钻B. 扳手C. 螺丝刀D. 砂纸4. 在PLC编程中,常开触点表示(A)。
A. 常闭触点断开时,输出接通B. 常闭触点接通时,输出断开C. 常开触点断开时,输出断开D. 常开触点接通时,输出接通5. 下列哪种液体的沸点最高?(D)A. 水B. 酒精C. 汽油D. 石油二、填空题(每题5分,共25分)1. 交流电是指电流方向_____变化的电流。
(周期性)2. 欧姆定律表明,在电路中,电流强度与电压成_____,与电阻成_____。
(正比、反比)3. 钻头直径的大小通常用_____表示。
(毫米)4. PLC编程语言分为_____和_____两种。
(梯形图、指令表)5. 电压是指电荷在电场力作用下,从一点移动到另一点所需的_____。
(能量)三、判断题(每题5分,共25分)1. 交流电的电流方向每秒变化50次。
(错误)2. 电阻的大小与材料、长度和横截面积有关。
(正确)3. PLC编程时,只能使用梯形图编程。
(错误)4. 电烙铁是用于焊接电子元件的工具。
(正确)5. 交流电的电压值是固定的。
(错误)四、简答题(每题10分,共30分)1. 请简述并联电路和串联电路的区别。
2. 请简述PLC编程的基本步骤。
3. 请简述钻孔时如何选择合适的钻头。
五、论述题(每题20分,共40分)1. 论述交流电和直流电的区别及其应用场景。
2. 论述欧姆定律在实际工程中的应用及意义。
答案:一、选择题1. A2. B3. A4. A5. D二、填空题1. 周期性2. 正比、反比3. 毫米4. 梯形图、指令表 5. 能量三、判断题1. 错误2. 正确3. 错误4. 正确5. 错误四、简答题1. 并联电路中,各电器元件并联连接,电流有多条路径,电压相同。
电工与电子科理论试题库适用层次:技工专业:汽车检测与维修专业班级:技工2010-13、14本学期总学时数:90学时编写人:大庆技师学院-李志峰一.填空题(应出100空,实出100空)1.有甲灯220V60W和乙灯110V40W白炽灯,把他们串联后接到220V电源上时(甲)灯较亮;若把他们并联后接到48V电源上时(乙)灯较亮。
2.保护接零是将电气设备在(正常)情况下不带电的(金属外壳)与(零线)连接。
3.汽车电气设备具有(两个电源)、(低压直流)、(并联单线)、负极搭铁四大特点。
4.在汽车单线制电路中,(正极端)引线常称(火)线,负极端引线常称(搭铁)线。
5.测量支路电流强度时,测量用的(电流)表应(串)联在被测支路中,电路应处于(通路)状态。
6.测量元器件两端电压时,测量用的(电压)表应(并)联在被测元器件两端,电路应处于(通路)状态。
7.测量电源电动势时,应采用(高阻抗电压)表在电源(开路)状态下进行。
8.测量直流电器电阻时,可用(电阻)表在电路(开路)状态下进行。
9.完整的电路一般由(电源)、(负载)、(中间环节)三个基本要素构成。
10.将电路中的(实物)用简单(符号)绘制的图称(电路)图。
11.电路通常有(通路)、(断路)、(短路)、接触不良四种状态。
12.汽车电路中具有一定(电位)的部位与(金属件)相碰时发生的短路现象,称(搭铁)故障。
13.所谓节点是指(三条或三条以上)支路的(汇交点)。
所谓回路是指电路中(任一闭合)路径。
14.任何两个彼此(绝缘)而又相互靠近的(导体)都可以看成是(电容)器。
15.电容器充放电的快慢,决定与充放电回路中(电阻)与(电容)的乘积,这个乘积记作(时间常数)称τ。
16.电磁铁由(磁化线圈)、(衔铁)、和(铁心)三个主要部分组成。
17.正弦交流电三要素是指(最大值)、(角频率)、(初相角)。
18.一般交流电流表、电压表测出的数值均是交流电的(有效)值。
灯泡、异步电动机等交流电上标准的电压值、(电流值)也是(有效)值。
船舶电子技工英语考试题型1、Do not _______ me to help you unless you work harder. [单选题] *A. expect(正确答案)B. hopeC. dependD. think2、19.Students will have computers on their desks ________ . [单选题] * A.in the future(正确答案)B.on the futureC.at the momentD.in the past3、Your homework must_______ tomorrow. [单选题] *A. hand inB. is handed inC. hands inD. be handed in(正确答案)4、You might not like the way Sam behaves, but please be kind to him. _____, he is your grandfather. [单选题] *A. After all(正确答案)B. Above allC. In allD. At all5、He has made a lot of films, but ____ good ones. [单选题] *A. anyB. someC. few(正确答案)D. many6、_____ of the teachers in this district are women teachers. [单选题] *A. Four fifthB. Four fifths(正确答案)C. Fourth fifthsD. Four five7、They all choose me ______ our class monitor.()[单选题] *A. as(正确答案)B. inC. withD. on8、1.I saw ________ action film with my friend yesterday, and ________ film was amazing. [单选题] *A.a...aB.a...theC.an...the(正确答案)D.an...a9、I’m sorry there are ______ apples in the fridge. You must go and buy some right now.()[单选题] *A. a littleB. littleC. a fewD. few(正确答案)10、Alice is a ______ girl. She always smiles and says hello to others.()[单选题] *A. shyB. strictC. healthyD. friendly(正确答案)11、90.—I want to go to different places, but I don’t know the ________. —A map is helpful,I think. [单选题] *A.price(正确答案)B.timeC.wayD.ticket12、I’m so tired after _______ walk. [单选题] *A. three hour’sB. three hours’(正确答案)C. three hoursD. three hour13、Finally he had to break his promise. [单选题] *A. 计划B. 花瓶C. 习惯D. 诺言(正确答案)14、5.Shanghais is known ________ “the Oriental Pearl”, so many foreigners come to visit Shanghai very year. [单选题] *A.forB.as (正确答案)C.withD.about15、I am worried about my brother. I am not sure _____ he has arrived at the school or not. [单选题] *A. whether(正确答案)B. whatC. whenD. how16、There are sixty _______ in an hour. [单选题] *A. hoursB. daysC. minutes(正确答案)D. seconds17、The family will have _______ good time in Shanghai Disneyland. [单选题] *A. theB. a(正确答案)C. anD. /18、The()majority of the members were against the idea. [单选题] *A. substantialB. enormousC. considerable(正确答案)D. overwhelming19、--What’s your _______, Jim Green?--Jim. [单选题] *A. full nameB. first name(正确答案)C. last nameD. family name20、In the past, Mary _______ listening to music in her spare time. [单选题] *A. will likeB. likesC. likeD. liked(正确答案)21、25.—I ______ Beijing for a holiday.—________. [单选题] *A.will go;GoodbyeB.will go;Have a good time(正确答案)C.will go to;Have a good timeD.am going to;Have a fun22、For more information, please _______ us as soon as possible. [单选题] *A. confidentB. confidenceC. contact(正确答案)D. concert23、—______ you speak French?—Yes, I can.()[单选题] *A. NeedB. Can(正确答案)C. MightD. Must24、Nearly everything they study at school has some practical use in their life, but is that the only reason _____ they go to school? [单选题] *A. why(正确答案)B. whichC. becauseD. what25、The beautiful radio _______ me 30 dollars. [单选题] *A. spentB. paidC. cost(正确答案)D. took26、Bill Gates is often thought to be the richest man in the world. _____, his personal life seems not luxury. [单选题] *A. MoreoverB. ThereforeC. However(正确答案)D. Besides27、( )He killed the enemy guard and made away _________the villagers. [单选题] *A. with the helpB. with helpC. with help ofD. with the help of(正确答案)28、--Jenny, what’s your favorite _______?? ? ? --like peaches best. [单选题] *A. fruit(正确答案)B. vegetablesC. drinkD. plants29、His father always _______ by subway. [单选题] *A. go to workB. go to schoolC. goes to bedD. goes to work(正确答案)30、In winter, animals have a hard time_____anything to eat. [单选题] *A.to findB.finding(正确答案)C.foundD.to finding。
船舶電子技工題庫電氣系12級船電班Thursday, January 09, 2014【关联题】In synchronous machines, a direct current is applied to the rotor winding, which then produces a rotor magnetic field. The rotor is then turned by a prime mover producing a rotating magnetic field. “Field windings”applies to the windings that produce the main magnetic field in a machine, and “armature windings” applies to the windings where the main voltage is induced. For synchronous machines, the field windings are on the rotor, so the terms “rotor windings” and “field windings” are used interchangeably. The rotor of a synchronous generator is a large electromagnet and the magnetic poles on the rotor can either be salient or non-salient construction. Non-salient pole rotors are normally used for rotors with 2 or 4 poles rotor, while salient pole rotors are used for 4 or more poles rotor.(1)The prime mover mentioned in the passage does not include .A. diesel engineB. wind powerC. Water power(2) Non-salient pole rotors are normally used for those with poles.A. not more than 2 pairsB. not more than 4 pairsC. more than 2 pairs(3)Which of the following statements is not TRUE?A. Field windings produce the main magnetic fieldB. A direct current is used to produce magnetic fieldC. The main voltage is produced by armature windings(4)The word “salient” means .A. prominentB. pointing outwardsC. not iceable【单选】The English for “兆欧表”is .A.MeggerB.V oltmeterC.M ultimeter【单选】The is used to measure current.A.a mmeterB.v oltmeterC.w attmeter【单选】 is a vertical height between the sea level and the bottom of the ship.A.LOAB.BeamC.Breadth【单选】The of the M/E is 5500kw at 115rpm.A.o utputB.t emperatureC.s peed【单选】The insulation class of an electric motor indicates its .A.Maximum input of horsepower.B.Maximum temperature rise of the insulationmaterialC.Maximum input of kilowatts【单选】The English for “电压表”is .A.V oltmeterB.S ynchrometerC.A mmeter【单选】The SOLAS Convention is the main international convention.A.Covering safety of life.B.About marineC. About marine pollution prevention【单选】 is used to measure the voltage.A.S ynchrometerB.A mmeterC.V oltmeter【单选】The indicator cock is fixed on the cylinder. The meaning of “indicator cock” is .A.示功阀B.排气阀C.安全阀【单选】Voltage will always lead current in a/an .A.inductive circuitB.capacitive circuitC.magnetic circuit【单选】Remote control means that .A.The system is controlled automatically.B.The system is manned manuallyC.The system is situated remotely from the operator【单选】The star-delta starter is an effective method of voltage starting of a motor.A, the reducedB. increasedC. unchanged【单选】The number of cycles per second occurring in AC voltage is known as the .A.wave formB.phase angleC.frequency【单选】De-ballasting of STARBOARD No.1 ballast tk. The meaning of “STARBOARD”No.1 ballast tank”is .A,前尖舱B.右舷1号压载舱C.后尖舱【单选】The English for “二极管”is .A, thyristorB. DiodeC. transistor【单选】Which of the following mechanical components has the function for housing the connection terminalbox?A.A statorB.A rotorC.A chassis【单选】Before doing maintenance on electrical equipment, you should .A.with a test pen in handB.turn on power firstC.turn off power first【单选】If a fire ignites in the engine room as a result of a high pressure fuel oil leak, you should FIRST .A.find a soda acid extinguisherB.shut off the fuel oil supplyC.secure the ventilation【单选】High values of ohms per volt any change in circuit characteristics.A.d enoteB.m inimizeC.i ndicate【单选】Which of the following statements about the short-circuit protection is not true?A.It is often provided to cater for terminalflashoversB.It is provided because faults between phases oftenoccurC.It is often provided to cater for major statorwinding faults【单选】Conductor insulation designed for 600V should indicate a resistance of .A.600,00Ω or lowerB.60,00Ω or higherC.600,00Ω or higher【单选】SOLAS stands for .A.the International Convention for the preventionfrom shipB.the International Convention on Standards ofTraining, Citification and Watch keeping for SeafarersC.the International Convention for the Safety of theLife at Sea【单选】Which of the following materials is a good insulator?A.g lassB.a luminumC.s teel【单选】If you are asked to accept delivery of stores and spare parts, you should .A.accept all itemsB.refuseC.make clear of your authority【单选】If an oil spill occurs on deck, you should cover the area with absorbent material. The meaning of “oil spill” is .A.着火B.搁浅C.溢油【单选】Which one of the following is not safety precaution?A.safety shoesB.jacketC.safety cap【单选】Which of the following is not one of the incorrect operating conditions of ship generators?pile records regularlyB.reverse power protectionC.outside short circuit protection【单选】The English for“污水泵”is .A.boiler feed water pumpB.sewage pumpC.fuel transfer pump【单选】We should pay attention to the when welding and cutting?A.W aterB.A irC.F uel oil【单选】The Safety of Life at Sea Conventions was developed by theA.I MDG conferenceB.I nternational Maritime OrganizationC.American Bureau of Shipping【单选】Under the terms of ISPS code, shipping companies are required to designate a Company Security Officer for the company and a for each of its ships.A.Ship Security OfficerB.Designated Person AshoreC.Internal Auditor【单选】The fresh water generator is used produce fresh water. The meaning of fresh water generator'is .A.空压机B.绞缆机C.造水机【单选】When measuring AC current flow, you must always connect the meter .A.in parallel with the power source and loadB.in series with the power source and loadC.insuring correct polarity【单选】When the voltage remains constant and the resistance is increased in a series circuit, the current .A.d ecreasesB.i ncreasesC.i ncreases by the square of the original value 【单选】 bilge water to oily water separator.A.T ransferB.P ump outC.S tart【单选】The ballast water can be stored in the doublebottom. The meaning of “double bottom”is .A.涡轮增压器B.双层底C.油底壳【单选】Which is not one of the possible functions of the loss-of load protection?A.It can allow a motor to recover when the voltageis restored.B.It can stop a motor in case of a failure in amechanical transmission.C. It can be used to protect a pump against becomingunprimed.【单选】What type of oil is NOT covered in the oil pollution laws?A.main switchboardB.emergency switchboardC.main busbar【单选】The Chinese for “fuel oil system”is .A.冷却系统B.燃油系统C.润滑系统【单选】Electrical circuits are protected against overheating by means of a/an .A.d iodeB.a mplifierC.c ircuit breaker【单选】In order to find out which lifeboat you are assigned, you should look at the muster list. The meaning of “muster list” is .A.应变部署表B.火灾控制计划C.证书检查【单选】The motorman is working, “motorman”means .A.机工B.服务员C.电子员【单选】F.W.E at 0900.F.W.E means .A.fit water engineB.finished with engineC.fished with exhaust【单选】An carrier is a tank ship designed fortransporting liquefied natural gas.A.L NGB.O BOC.L PG【单选】The inverter may use the following except .A.I GBT sB.T hyristorsC.I CGT s【单选】In a deck crane, a motor is used for rotating the crane.A.L uffingB.S lewingC.H oisting。