相关试题
【单选题】
(33017)发电车控制屏的额定电流是( )。(1.0分)___
A. 400
B. 441
C. 541
D. 641
【单选题】
(33018)对于发电车控制屏上的各指示灯，下列说法正确的是( )。(1.0分)___
A. 形状相同的指示灯均可互换
B. 指示灯不亮，说明与之相连的电路无电源
C. 指示灯坏，一般不影响其他电路正常工作
D. 所有指示灯的颜色应保持一致
【单选题】
(33019)下列各符号与仪表对应正确的是( )。(1.0分)___
A. A表示电压表
B. V表示电流表
C. cosφ表示功率表
D. Hz表示频率表
【单选题】
(33020)仪表用互感器的用途中，( )不是其用途之一。(1.0分)___
A. 结构简单、方便接线
B. 扩大交流仪表的量程
C. 测量高电压时，保证工作人员和仪表的安全
D. 有利于仪表生产的标准化、降低生产成本
【单选题】
(33021)柴油机的一种故障，可能表现出几种异常现象，如，柴油机供油系统中喷油泵柱塞磨损，下列一组可能的故障现象全对的是( )。(1.0分)___
A. 启动困难、功率不足、低速运转不稳定、冒白烟
B. 启动困难、功率不足、低速运转不稳定、冒黑烟
C. 启动困难、功率不足、低速运转不稳定、冒蓝烟
D. 启动困难、超速、低速运转不稳定、冒黑烟
【单选题】
(33022)柴油机启动困难，下列可能出现的故障全对的一组是( )。(1.0分)___
A. 电池电压不足、燃油供给不足、外温过高、进气不畅、燃油中含有水分
B. 电池电压不足、燃油供给不足、冷却水温过高、进气不畅、燃油中含有水分
C. 电池电压不足、燃油供给不足、烧机油、进气不畅、燃油中含有水分
D. 电池电压不足、燃油供给不足、气门漏气、进气不畅、燃油中含有水分
【单选题】
(33023)对于柴油机的故障，下列说法正确的是( )。(1.0分)___
A. 柴油机产生故障，看不见、听不到、摸不着
B. 柴油机的故障，一般是孤立的
C. 柴油机的故障，一般是相互联系的
D. 柴油机的故障，必须通过仪器检测
【单选题】
(33024)柴油机启动转速太低，下列( )不是其中原因之一。(1.0分)___
A. 启动电池容量不够
B. 气温太低
C. 启动操作技术欠妥
D. 气门间隙有误差
【单选题】
(33025)冬季柴油机不易启动，( )不是其中原因之一。(1.0分)___
A. 机油黏度大，不易流动
B. 上油箱油位低于3/4
C. 柴油黏度大，不易流动
D. 气缸散热快，使使压缩冲程终了时的温度低，柴油不易燃烧
【单选题】
(33026)发电车柴油机组正常运行时，如果出现游车，下列( )不是其中原因之一。(1.0分)___
A. 上油箱缺油
B. 燃油系统中有空气
C. 执行器故障
D. 控制系统电压低于19V
【单选题】
(33027)发电车柴油机出现游车，下列处理方法不正确的是( )。(1.0分)___
A. 如果因为燃油精滤器脏堵，更换燃油精滤器，同时清洗燃油粗滤器
B. 如果是因为执行器脏堵，则更换燃油精滤器
C. 如果是燃油中有空气，则排气
D. 如果是个别喷油器不工作，则调整柱塞行程或更换喷油器
【单选题】
(33028)柴油机正常运行中，如果出现供油量不足，则柴油机的排气烟色会是( )。(1.0分)___
【单选题】
(33029)发电车柴油机供油量不足，下列( )不是主要原因之一。(1.0分)___
A. 停车电磁阀开度不够
B. 执行器滑卡
C. 上油箱油位过低
D. 喷油器故障
【单选题】
(33030)发电车运行中，如果柴油机主循环水管道爆裂，大量冷却水外泄，正确的应急处理方法是( )。(1.0分)___
A. 积极处理水管爆裂处
B. 尽力处理爆裂处，一旦处理不好时，再停机，启用别的机组供电
C. 关闭膨胀水箱与该机的水阀，停机，启用别的机组供电
D. 要求停车补水
【单选题】
(33031)发电车康明斯柴油机运行中，如果燃油精滤器至PT泵的油管漏油，正确的应急处理方法( )。(1.0分)___
A. 积极处理漏油处
B. 停机、关油阀，立即更换其他机组供电
C. 关油阀，再处理，如果处理不好，就停机
D. 用包扎带捆绑，只好减少渗漏就行了
【单选题】
(33032)发电车运行途中，如果冷却单节大量漏水，正确的处理程序是( )。(1.0分)___
A. 关闭该机水管与膨胀水箱的阀门→停机→启用其他机组供电→积极处理漏水处
B. 关闭该机水管与膨胀水箱的阀门→积极处理漏水处→停机→启用其他机组供电
C. 停机→关闭该机水管与膨胀水箱的阀门→积极处理漏水处→启用其他机组供电
D. 停机→关闭该机水管与膨胀水箱的阀门→启用其他机组供电→积极处理漏水处
【单选题】
(33033)柴油机进气系统漏气，不会引起下列( )故障现象。(1.0分)___
A. 功率下降
B. 冒黑烟
C. 带不起大负载
D. 超速
【单选题】
(33034)柴油机排气系统漏气，会引起下列( )故障现象。(1.0分)___
A. 柴油机怠速时，有间隙性的异响
B. 超速
C. 冒黑烟
D. 冒白烟
【单选题】
(33035)发电车运行中，柴油机进排气管道漏气，正确的处理方法是( )。(1.0分)___
A. 更换其他机组供电，同时积极处理漏气处
B. 无需停机，用铁丝、包扎布绑紧漏气管道
C. 将备用机组的管道拆下，替换漏气管
D. 更换其他机组供电，填写“车统-181”交库检处理
【单选题】
(33036)柴油机出现“飞车”，下列不正确的处理方法是( )。(1.0分)___
A. 关掉进油阀，切断燃油进油管
B. 迅速堵住空气滤清器进气口，切断进气
C. 关掉配电屏上的停机开关
D. 有减压装置的柴油机，将减压手柄推到减压位，打开气门，使缸内空气减压
【单选题】
(33037)发电车运行途中柴油机突然停机，下列检查方法不正确的是( )。(1.0分)___
A. 检查24V电源系统
B. 检查柴油机操纵盘的报警指示灯
C. 检查上油箱油量
D. 检查冷却塔
【单选题】
(33038)发电车运行中康明斯柴油机突然停机，不可能是下列原因之一的是( )。(1.0分)___
A. 缺燃油
B. 停车电磁阀不得电
C. 24V电源保险断路
D. 柴油机过载
【单选题】
(33039)发电车康明斯柴油机运行中突然停机，正确的处理方法是( )。(1.0分)___
A. 检查24V电源，如正常，立即启动其他机组供电，再积极处理突然停机故障
B. 处理突然停机故障，应先检查燃油滤清器
C. 处理突然停机故障，应先检查空气滤清器
D. 当确认故障已排除，无需排空气，即可启机试验
【单选题】
(33040)发电车康明斯柴油机油底壳进柴油的原因，下列说法正确的是( )。(1.0分)___
A. 停机时未关闭进油阀或油阀不良，而喷油器正处于供油位，因油位压差较大，使得柴油渗入缸内流到油底壳
B. 停机时未关闭进油阀或油阀不良，因上油箱油位过高，压差大，把柴油通过喷油器压进油底壳
C. 柴油机工作时，喷油器雾化不良，滴入的柴油经燃烧室流入到油底壳
D. 柴油机工作时，由于进气量不足，柴油没有充分燃烧，多余的柴油经燃烧室流入到油底壳
【单选题】
(33041)发电车康明斯柴油机油底壳进柴油，下列处理方法正确的是( )。(1.0分)___
A. 分解清洗或更换电磁阀及进油阀、更换机油、更换机油滤清器
B. 更换所有喷油器、更换机油、更换机油滤清器
C. 更换机油、更换燃油滤清器、清洗燃油粗滤器
D. 更换机油、更换机油滤清器、清洗PT泵
【单选题】
(33042)发电车康明斯柴油机油底壳进柴油，会引起一些故障现象，下列说法正确的是( )。(1.0分)___
A. 油底壳机油面升高，机油压力升高，润滑不良，机油温度升高，冷却水温升高
B. 油底壳机油面升高，机油压力降低，润滑不良，机油温度降低，冷却水温降低
C. 油底壳机油面升高，机油压力降低，润滑不良，机油温度降低，冷却水温升高
D. 油底壳机油面升高，机油压力降低，润滑不良，机油温度升高，冷却水温升高
【单选题】
(33043)发电车康明斯柴油机油底壳进水，下列可能出现的故障原因不正确的是( )。(1.0分)___
A. 机油冷却器破裂
B. 缸套裂纹或穴蚀穿孔
C. 缸盖垫冲坏或缸套密封胶圈损坏
D. 中间冷却器破裂
【单选题】
(33044)发电车柴油机与发电机安装后，如果同轴度有偏差，产生下列故障现象不正确的是( )。(1.0分)___
A. 有异常振动
B. 有异响
C. 发电机发电偏低
D. 轴承有异常温升
【单选题】
(33045)发电车柴油机与发电机联结时，正确的操作方式是( )。(1.0分)___
A. 将柴油机水平地放在机架上→纵向保持柴油机与机架对齐→紧固柴油机四角→吊入发电机→给发电机加或减钢垫→水平升高或降低发电机直到轴心与柴油机轴心处在同一直线上→紧固发电机四角螺栓→对角紧固联结螺栓，均匀使发电机圆周靠向柴油机并紧固
B. 将柴油机水平地放在机架上→纵向保持柴油机与机架对齐→紧固柴油机四角→吊入发电机→给发电机加或减钢垫→水平升高或降低发电机直到轴心与柴油机轴心处在同一直线上→对角紧固联结螺栓，均匀使发电机圆周靠向柴油机并紧固→紧固发电机四角螺栓
C. 将柴油机水平地放在机架上→纵向保持柴油机与机架对齐→吊入发电机→紧固柴油机四角→给发电机加或减钢垫→水平升高或降低发电机直到轴心与柴油机轴心处在同一直线上→对角紧固联结螺栓，均匀使发电机圆周靠向柴油机并紧固→紧固发电机四角螺栓
D. 将柴油机水平地放在机架上→紧固柴油机四角→纵向保持柴油机与机架对齐→吊入发电机→给发电机加或减钢垫→水平升高或降低发电机直到轴心与柴油机轴心处在同一直线上→对角紧固联结螺栓，均匀使发电机圆周靠向柴油机并紧固→紧固发电机四角螺栓
【单选题】
(33046)发电车柴油机与发电机同轴度偏差较大，不会引起下列( )后果。(1.0分)___
A. 柴油机无用功加大
B. 电机轴承损坏
C. 发电机扫膛
D. 柴油机烧机油
【单选题】
(33047)冬季发电车运行时，下油箱燃油析蜡，下列处理方法全正确的一组是( )。(1.0分)___
A. 采用“手动位”启动交流燃油泵连续抽油、启动车上所有柴油机、减少柴油机负载、停站时向下油箱内注热水
B. 采用“手动位”启动交流燃油泵连续抽油、启动车上所有柴油机、在下油箱加防冻液、停站时向下油箱外浇热水
C. 采用“手动位”启动交流燃油泵连续抽油、启动车上所有柴油机、减少柴油机负载、向下油箱加盐
D. 采用“手动位”启动交流燃油泵连续抽油、启动车上所有柴油机、减少柴油机负载、停站时向下油箱外浇热水
【单选题】
(33048)冬季发电车运行时，下油箱析蜡，会引起下列( )后果。(1.0分)___
A. 柴油机燃烧不充分，功率下降
B. 柴油中混有蜡杂物，柴油机会游车
C. 柴油中混有蜡杂物，柴油机会出现“飞车”
D. 下油箱的油因凝结成蜡状，燃油抽不到上油箱，柴油机因缺油而停机
【单选题】
(33049)冬季发电车选用的燃油牌号应选用凝固点比外温( )。(1.0分)___
A. 高5℃～10℃
B. 低5℃～10℃
C. 高3℃～5℃
D. 低3℃～5℃
【单选题】
(33050)柴油发电机组一般采用( )直流电动机作为起动电机。(1.0分)___
【单选题】
(33051)磁电系电流表扩大量程的办法是：与测量机构( )电阻。(1.0分)___
A. 串联分流
B. 并联分流
C. 串联分压
D. 并联分压
【单选题】
(33052)在直流稳压电路中，效率最高的是（ ）。(1.0分)___
A. 串联型稳压电路
B. 开关型稳压电路
C. 并联型稳压电路
D. 不能确定
【单选题】
(33053)热继电器是利用电流的( )原理来工作的保护电器，它在电路中用作电动机的过载保护。(1.0分)___
A. 磁效应
B. 热效应
C. 电场效应
D. 流动效应
【单选题】
(33054)康明斯发电车冷却风机手动位时，若出现水温超过88℃，风机仍未自动启动，这一故障最大可能性是( )。(1.0分)___
A. 风机手动启动按钮损坏
B. 85℃水温开关无法闭合
C. 65℃水温开关无法断开
D. KA8线圈无法自锁
【单选题】
(33055)带电换表时，若接有电压、电流互感器，则应分别( )。(1.0分)___
A. 开路、短路
B. 短路、开路
C. 均开路
D. 均短路
【单选题】
(33056)康明斯柴油发电机组在向外供电过程中出现( )情况时只报警却不分闸。(1.0分)___
A. 逆功率
B. 过电流脱扣
C. 过电流预报警
D. 冷却风机卡死
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9 The young man is very happy and proud to
be ( ) the old professor because he always feeIs great when talking With him.
【填空题】
prepare for , be bound to , stand up for , in favor of ,speculate about , in the company of, in the form of , be liable to , invest..with , in succession
10 One day they passed more than 20 villages ( ),and some of these are Said to have stretched for six miles or more.
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7 Being asingle parent,there is no way for her
to ( ) the time and energy she has
devoted to her children for the past 10 years.
【填空题】
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8 It is essential that you start by listening because one of the main ( ) teenagers and their parents face in forming positive relationships is that neither listens to the other.
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9 We all know the dangers of an earthquake: the ( ) to buildings,the troubles can be caused by falling trees,and the terror occurs when the earth actually opens uip.
【填空题】
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10 Not until recently have we realized that the increasing world population may lead to a potential gloomy ( ) for humanity starvation.
【填空题】
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2 It is the development strategy/of the company to ( ) its overseas expansion in order to take a slice of the world market
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3 Nearly six million people go to see the Mona
Lisa every year,attracted by the ( )of her smile.When you're not lodking at her, she seems to be smiling;when you look at her,she stops.
【填空题】
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4 To live with a family whose native language is English is the ideal way to further improve one's English and to gain ( )into its culture.
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5 There is a real need to ( ) academic
achievement in schools and help with the
development of a student's overall character.
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6 Einstein said his scientific discoveries grew
from his imagination rather than from( ),
reason and language.
【填空题】
commence,deserve,tempting, coordinate,
lodge,confess, grant, proceed ,display, consequently
1 When the police caught up with him, Mr.Foster had to [ ] that he'd broken the speed limit.
【填空题】
commence,deserve,tempting, coordinate,
lodge,confess, grant, proceed ,display, consequently
2 Whenever my boss makes a decision that I don't agree with, I tell him what I really think, though it's [ ] to make him happy by telling him his ideas are always right
【填空题】
commence,deserve,tempting, coordinate,
lodge,confess, grant, proceed ,display, consequently
3 As can be probably perceived, a manned tip to Mars may soon[ ] since scientists have achieved the manned moon mlssion
【填空题】
commence,deserve,tempting, coordinate,
lodge,confess, grant, proceed ,display, consequently
4 A number of countries are [ ]their efforts to send out food to the area worst affected by the flood.
【填空题】
immune to , fall in love with , go along with, on one's behalf, be filled with , take the liberty of , expel from , be pessimistic about
She authorizcd her partner to carry out daily responsibllitles [ ]when she was on her business trip
【填空题】
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On hering the latest news about your mother's ill health, I [ ]canceling your reservation at the Sheraton.
【填空题】
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There was an obvious indication that the police who have to enforce the new law were not[ ] the general discontent.
【填空题】
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When she heard of her failure in the experiment, her eyes[ ]tears; whether it was of shame, frustration, orgrief was difficult to tell.
【填空题】
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Rose knows that continuous letters fromJohn, together with countless roses are aimedat making her[ ]him.
【填空题】
immune to , fall in love with , go along with, on one's behalf, be filled with , take the liberty of , expel from , be pessimistic about
[ ]public school for drinking and smoking and then failing inshow business as a singer, she joined her father's business 10 years ago.
【填空题】
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Since the great scandals in banking,many people in the Country have[ ]the prospects of economic recovery within a few years.
【填空题】
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The parents were quite happy to[ ]our suggestion because had taked their most important concernsinto consideration.
【填空题】
enlighten, discard, restore, fluctuate,prejudice ,
profit , rival, motivate,implement, investigate
1When employees participated in the problem-solving process, they were muchvmore willing to [ ] solutions to the problems.___
【填空题】
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profit , rival, motivate,implement, investigate
2 A strong police force has been placed between the two [ ]group in the village to prevent fighting and killing.___
【填空题】
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profit , rival, motivate,implement, investigate
3 Although personally we believe this to be of only secondary importance, its potential role in [ ] innovative acts cannotbe.___
【填空题】
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profit , rival, motivate,implement, investigate
4Though many things have been changed culturally, there is a commitment and sense of responsibility that have not yet been [ ] in today's society___
【填空题】
enlighten, discard, restore, fluctuate,prejudice ,
profit , rival, motivate,implement, investigate
5 Western nations have older and shrinking populations since they entered the 21stcentury and their [ ] birth rates have also posed problems___
【填空题】
enlighten, discard, restore, fluctuate,prejudice ,
profit , rival, motivate,implement, investigate
6 She didn't want to marry him and was [ ] against him because he had only a bachelor's degree and didn't meet her expectations for marriage.___
【填空题】
enlighten, discard, restore, fluctuate,prejudice ,
profit , rival, motivate,implement, investigate
7 The president is in trouble and will have to work hard to [ ] his credibility after people discovered that he was not telling the truth.___
【填空题】
enlighten, discard, restore, fluctuate,prejudice ,
profit , rival, motivate,implement, investigate
8 To study a number of subjects in the humanities has been both enjoyable and [ ]providing me with a new and different perpective on the world in which we live.___
