【单选题】
(71318)常用的磁性材料中，电工用纯铁具有优良的软磁特性，但电阻率( )。[213110224](1.0分)___
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相关试题
【单选题】
(71319)客车广播配线的绝缘电阻值应大于( )。(1.0分)___
A. 2 M
B. 3 M
C. 4 M
D. 5 M
【单选题】
(71320)电工硅钢片属于( )。[213110224](1.0分)___
A. 软磁材料
B. 硬磁材料
C. 45号钢
D. 永磁材料
【单选题】
(71321)铁路局( )向铁道部上报客车配属统计情况。(1.0分)___
【单选题】
(71322)可以直接读取数值获得测量结果的仪表称为( )电工仪表。[221110219](1.0分)___
A. 直读式
B. 安装式
C. 便携式
D. 电动式
【单选题】
(71323)仪表的指示值与被测量的实际值之差称为( )。[212110206](1.0分)___
A. 绝对误差
B. 引用误差
C. 相对误差
D. 最大引用误差
【单选题】
(71324)客车报废自核准之日起取消配属，并在( )内解体完毕。(1.0分)___
A. 1个月
B. 2个月
C. 3个月
D. 6个月
【单选题】
(71325)电力连接线的电缆线芯的长期允许工作温度不得超过( )。(1.0分)___
A. 60 ℃
B. 70 ℃
C. 55 ℃
D. 65 ℃
【单选题】
(71326)安装式指示仪表的系列代号为( )的是电磁系仪表。[222110228](1.0分)___
【单选题】
(71327)运用列车质量鉴定时，列车等级分四档，B级列车为( )。(1.0分)___
A. 800～899分
B. 900～1 000分
C. 700～799分
D. 600～699分
【单选题】
(71328)BSP青藏车空调机组的送风温度控制器探头设于( )下部。(1.0分)___
A. 新风过滤网
B. 第一节主送风道(即一位端过渡风道)
C. 回风口
D. 送风口
【单选题】
(71329)用电流表测量电流时，应将电流表与被测电路连接成( )方式。[322110218](1.0分)___
A. 串联
B. 并联
C. 串联或并联
D. 混联
【单选题】
(71330)测量电压时，对电压表的要求是( )。[233110206](1.0分)___
A. 与电路串联，内阻大些
B. 与电路串联，内阻小些
C. 与电路并联，内阻大些
D. 与电路并联，内阻小些
【单选题】
(71331)25T型客车A3级修程即( )。(1.0分)___
A. 安全检修
B. 40万km段修
C. 80万km段修
D. 大修
【单选题】
(71332)铁路局管内运行的旅客列车可按走行公里确定入库检修周期，原则上运行( )须入库检修一次。(1.0分)___
A. 2 000 km
B. 3 000 km
C. 4 000 km
D. 5 000 km
【单选题】
(71333)为减小测量误差，对电流表和电压表的内阻要求是( )。[233110206](1.0分)___
A. 电流表内阻大，电压表内阻小
B. 电流表内阻小，电压表内阻大
C. 电流表和电压内阻都小
D. 电流表和电压表内阻都大
【单选题】
(71334)运行到华东、华中、华南、西南的客车，每年在( )前，完成客车电扇和独立供电空调客车的安装调试工作。(1.0分)___
A. 4月1日
B. 5月1日
C. 6月1日
D. 7月1日
【单选题】
(71335)25K型客车检修规程规定：TGN3型和TGN3A型客车逆变电源装置试验时接入DC 600 V电源，短接电源控制柜( )线，接通DC 600 V电源，开启逆变电源。(1.0分)___
A. 3号、15号
B. 40号、200号
C. 41号、198号
D. 43号、188号
【单选题】
(71336)车辆段应设质量检查机构，质量检查机构应( )对全部运用列车进行质量检查和鉴定。(1.0分)___
【单选题】
(71337)25K型客车检修规程规定：电机在额定电压下进行试验，空载转速和电流须为额定值；在40 ℃及以下负载运转1 h，转子轴承温度不超过( )。(1.0分)___
A. 70 ℃
B. 65 ℃
C. 60 ℃
D. 80 ℃
【单选题】
(71338)BSP客车蓄电池充电机电路控制板上电位器RP2的作用是( )。(1.0分)___
A. 调整输出电流反馈大小
B. 调整电流给定
C. 调节输出电压大小
D. 调节温度补偿电压反馈度
【单选题】
(71339)鉴定列车在( )内发生险性及以上责任行车事故的，取消鉴定评比资格。(1.0分)___
【单选题】
(71340)BSP客车蓄电池充电机电路控制板上电位器RP4的作用是( )。(1.0分)___
A. 调整输出电流反馈大小
B. 调整电流给定
C. 调节输出电压大小
D. 调节温度补偿电压反馈度
【单选题】
(71341)( )是运用客车维修与保养的主体，承担着客车入库检修、辅修、A1修和客车整修等工作。(1.0分)___
A. 库列检
B. 客列检
C. 车辆包乘组
D. 质量检查组
【单选题】
(71342)在使用万用表的R×100 挡位测量电阻时，在标度尺上的指针读数是21.5，则被测电阻的实际值为( )。[322120219](1.0分)___
A. 21.5
B. 2150
C. 0.215
D. 215
【单选题】
(71343)硬座车的基本记号为( )。(1.0分)___
【单选题】
(71344)属客列检不摘车修范围的故障，未做处理或摘车处理为( )责任。(1.0分)___
A. 库列检
B. 客列检
C. 车辆包乘组
D. 质量检查组
【单选题】
(71345)软卧车的基本记号为( )。(1.0分)___
【单选题】
(71346)无客列检作业时，车端电气连接线的摘解，由( )负责。(1.0分)___
A. 客列检人员
B. 机车乘务组
C. 车辆乘务员
D. 调车人员
【单选题】
(71347)行李车的基本记号为( )。(1.0分)___
【单选题】
(71348)旅客列车运行途中甩挂车辆时，车辆的摘挂、软管的摘解，由( )负责。(1.0分)___
A. 客列检人员
B. 机车乘务组
C. 车辆乘务员
D. 调车人员
【单选题】
(71349)客车转向架中，不能用于快速车的是( )。(1.0分)___
A. 209HS型
B. 206KP型
C. 206G型
D. SW-160型
【单选题】
(71350)发生双管供风设备故障或用单管供风机车救援接续牵引时，( )根据命令将编组客车风管路改为单管供风状态。(1.0分)___
A. 客列检人员
B. 机车乘务组
C. 车辆乘务员
D. 调车人员
【单选题】
(71351)使用万用表测量电压或电流时，应使指针在刻度的( )位置上，该数才能较准确。[222120219](1.0分)___
A. 1/2～3/4
B. 1/3～2/3
C. 1/2～2/3
D. 1/3～1/2
【单选题】
(71352)安装有客车发电机和蓄电池等全套电源装置，能独立供电的客车叫( )。(1.0分)___
【单选题】
(71353)运用列车每月应定期排除列车首尾各( )客车风缸内的积水。(1.0分)___
【单选题】
(71354)YW22型48 V电压制配电盘终夜灯熔断器容量是( )(1.0分)___
A. 10 A
B. 15 A
C. 20 A
D. 25 A
【单选题】
(71355)车间干部应 ( )检查《旅客列车技术状态交接簿》(车统—181)情况并签字。(1.0分)___
【单选题】
(71356)蓄电池施行准放电时，以( )放电。(1.0分)___
A. 3 h率
B. 6 h率
C. 9 h率
D. 12 h率
【单选题】
(71357)在万用表表笔未接入时的调零叫( )。[222110219](1.0分)___
A. 机械调零
B. 电位器调零
C. 机械和电位器调零
D. 欧姆调零
【单选题】
(71358)运用列车质量鉴定时，列车等级分四档，D级列车为( )。(1.0分)___
A. 800～899分
B. 900～1 000分
C. 700～799分
D. 600～699分
推荐试题
【单选题】
Being a pop star can be quite a hard life, with a lot of traveling ________ heavy schedules.
A. with regard to
B. as to
C. in relation to
D. owing to
【单选题】
Tony is very disappointed _______ the results of the exam.
A. with
B. for
C. toward
D. on
【单选题】
William Penn, the founder of Pennsylvania, _________ defended the right of every citizen to freedom of choice in religion.
A. peculiarly
B. indifferently
C. vigorously
D. inevitably
【单选题】
When people become unemployed, it is _______ which is often worse than lack of wages.___
A. laziness
B. poverty
C. idleness
D. inability
【单选题】
In previous times, then fresh meat was in short __________, pigeons were kept by many households as a source of food.
A. store
B. provision
C. reserve
D. supply
【单选题】
Those gifts of rare books that were given to us were deeply _________.___
A. appreciated
B. approved
C. appealed
D. applied
【单选题】
It is our ___________ policy that we will achieve unity through peaceful means.___
A. consistent
B. continuous
C. considerate
D. continual
【单选题】
He is __________ about his chances of winning a gold medal in the Olympics next year.___
A. optimistic
B. optional
C. outstanding
D. obvious
【单选题】
The director was critical _______________ the way we were doing the work.___
A. at
B. in
C. of
D. with
【单选题】
In a sudden _____________ of anger, the man tore up everything within reach.___
A. attack
B. burst
C. split
D. blast
【单选题】
In Britain people _____________ four million tons of potatoes every year.___
A. swallow
B. dispose
C. consume
D. exhaust
【单选题】
I'd _____________ his reputation with other farmers and business people in the community, and then make a decision about whether or not to approve a loan.___
A. take into account
B. account for
C. make up for
D. make out
【单选题】
She cooked the meat for a long time so as to make it _____________ enough to eat.___
A. mild
B. slight
C. light
D. tender
【单选题】
The computer revolution may well change society as _____________ as did the Industrial Revolution.___
A. certainly
B. insignificantly
C. fundamentally
D. comparatively
【单选题】
A lot of ants are always invading my kitchen. They are a thorough ___________.___
A. nuisance
B. trouble
C. worry
D. anxiety
【单选题】
As we can no longer wait for the delivery of our order, we have to _________ it.___
A. postpone
B. refuse
C. delay
D. cancel
【单选题】
When a fire _________ at the National Exhibition in London, at least ten priceless paintings were completely destroyed.___
A. broke of
B. broke out
C. broke down
D. broke up
【单选题】
The destruction of these treasures was a loss for mankind that no amount of money could __________.___
A. stand up to
B. make up for
C. come up with
D. put up with
【单选题】
The student was just about to ___________ the questions, when suddenly he found the answer.___
A. arrive at
B. submit to
C. work out
D. give up
【单选题】
When there are small children around, it is necessary to put bottles of pills out of _________.___
A. reach
B. hand
C. hold
D. place
【单选题】
The _________ of blood always makes him feel sick.___
A. sight
B. view
C. look
D. form
【单选题】
In Britain, the best season of the year is probably __________ spring.___
A. later
B. last
C. latter
D. late
【单选题】
Free medical treatment in this country covers sickness of mind as well as _________ sickness.___
A. normal
B. regular
C. average
D. ordinary
【单选题】
Although he had looked through all the reference material on the subject, he still found it hard to understand this point and her explanation only _________ to his confusion.___
A. extended
B. amounted
C. added
D. turned
【单选题】
A completely new situation will ___________ when the examination system comes into existence.___
A. arise
B. rise
C. raise
D. arouse
【单选题】
Cancer is second only __________ heart disease as a cause of death.___
A. of
B. to
C. with
D. from
【单选题】
The manager needs an assistant that he can _________ to take care of problems in his absence.___
A. count on
B. count in
C. count up
D. count out
【单选题】
We gave out a cheer when the red roof of the cottage came __________ view.___
A. from
B. in
C. before
D. into
【单选题】
They took ________ measures to prevent poisonous gases from escaping.___
A. fruitful
B. beneficial
C. valid
D. effective
【单选题】
Doing your homework is a sure way to improve your test scores, and this is especially true _______ it comes to classroom tests.___
A. when
B. since
C. before
D. after
【单选题】
In developing countries people are _______ into overcrowded cities in great numbers.___
A. breaking
B. filling
C. pouring
D. hurrying
【单选题】
There are other problems which I don't propose to ____________ at the moment.___
A. go into
B. go around
C. go for
D. go up
【单选题】
It is quite necessary for a qualified teacher to have good manners and _________ knowledge.___
A. extensive
B. expansive
C. intensive
D. expensive
【单选题】
I'm not sure whether I can gain any profit from the investment, so I can't make a(n) ______ promise to help you.___
A. exact
B. defined
C. definite
D. sure
【单选题】
The sports meet, originally due to be held last Friday, was finally ________ because of the bad weather.___
A. set off
B. broken off
C. worn off
D. called off
【单选题】
It has been revealed that some government leaders _______ their authority and position to get illegal profits for themselves.___
A. employ
B. take
C. abuse
D. overlook
【单选题】
Shelly had prepared carefully for her biology examination so that she could be sure of passing it on her first ________.___
A. intention
B. attempt
C. purpose
D. desire
【单选题】
The store had to _______ a number of clerks because sales were down.___
A. lay out
B. lay off
C. lay aside
D. lay down
【单选题】
All the students in this class passed the English exam ________ the exception of Li Ming.___
A. on
B. in
C. for
D. with
【单选题】
Writing is a slow process, requiring _______ thought, time, and effort.___
A. significant
B. considerable
C. enormous
D. numerous
