相关试题
【单选题】
JZ-7空气制动机分配阀副阀模板右侧为___压力空气。
A. 降压风缸
B. 列车管
C. 工作风缸
D. 作用风缸
【单选题】
抱轴瓦润滑间隙太小或两侧间隙太大产生偏斜时，会引起___。
A. 抱轴瓦裂损
B. 抱轴瓦过热
C. 抱轴瓦变形
【单选题】
单纯的联合调节器故障，可使柴油机超过额定最高转速，达到极限转速时，由于___的作用，柴油机自动停车不会引起“飞车”。
A. 电磁联锁
B. 紧急停车装置
C. 调速器动力活塞
【单选题】
柴油机运用中，膨胀水箱涨水的原因是：___。
A. 水箱水位过高
B. 柴油机水温高
C. 有燃气窜入水系统
【单选题】
当柴油机某缸发出刺耳的敲缸声，排气支管及总管发红冒黑烟___故障。
A. 排气阀横臂导杆折断
B. 进气阀横臂导杆折断
C. 气阀间隙调整不当
【单选题】
属于机车小修修程的项目是：___。
A. 恢复机车主要性能
B. 做故障诊断，按状态修理
C. 关键部件解体和检修
【单选题】
东风4B型机车中修的周期为___。
A. 17～21万km
B. 23—30万km
C. 37～43万km
【单选题】
东风4D型机车与东风4B型机车相比，未取消的电气部件是：___。
A. 油量开关UK
B. 前后增压器机油压力继电器3YJ、4YJ
C. 水温继电器WJ
【单选题】
东风4D型机车闭合燃油泵开关4K，燃油泵电机转动，但燃油压力表无显示的可能是：___。
A. 燃油泵来油阀在关闭位
B. 燃油管路中有空气
C. 两个都是
【单选题】
东风4D型机车设置空气制动—动力制动联锁装置的目的是：___。
A. 机车施行电阻制动时使列车不能施行空气制动
B. 列车施行空气制动时使机车不能制动电阻
C. 施行电阻制动时自动降低或完全切除空气制动对机车的作用
【单选题】
16V2402JC型柴油机未装用的增压器是：___。
A. 45GP802-1A型
B. VTC254-13型
C. ZN290型。
【单选题】
当自阀手柄置于紧急制动位时，列车管的压力空气首先通过___迅速向大气排风，从而达到紧急制动的目的。
A. 自阀调整阀
B. 分配阀紧急部
C. 自阀放风阀
D. 分配阀紧急部与放风阀同时动作
【单选题】
为提高机车与车辆再缓解充气的—致性，当列车管减压量大或降至零时，通过___使降压风缸空气压力保持在280～340kPa之间，使它与车辆制动机的副风缸在全制动后的压力大致保持—致。
A. 充气阀
B. 一次缓解逆流止回阀
C. 转换盖板
D. 保持阀
【单选题】
JZ-7空气制动机工作风缸和降压风缸内的过充压力是通过___消除的。
A. 中继阀
B. 一次缓解逆流止回阀
C. 转换盖板
D. 充气阀
【单选题】
机车膨胀水箱处在内燃机车冷却水系统的___。
【单选题】
JZ-7型空气制动机紧急限压阀在紧急制动时限制作用风缸压力不超过___。
A. 400kPa
B. 450kPa
C. 500kPa
【单选题】
JZ-7型空气制动机的管路系统中设有___个变向阀。
【单选题】
机车在无动力回送时，无动力回送装置能使总风缸空气压力增至___kPa。
A. 360-460
B. 500或600
C. 750-800
【单选题】
无级调速机车，主手柄置“降”位，降速时间为___s。
A. 10—12
B. 10—16
C. 12-22
【单选题】
电气动作试验时控制风缸压力在400kPa以下时，将1-6GK；置于___位。
【单选题】
当制动电流达到___A时，ZLJ动作。
【单选题】
12V240ZJ6柴油机的启动发火转速是___。
A. 50～80r/min
B. 60～100r/min
C. 80～120r/min
【单选题】
东风7C型机车C5型联合调节器技术参数规定其转速波动率小于或等于___。
【单选题】
12V240ZJ6型系列柴油机的几何压缩比为___。
A. 12：1
B. 11：1
C. 12.5：1
【单选题】
当增压器进油压力降到一定值后，YK4和___油压继电器动作使柴油机停机。
【单选题】
东风7C型机车使用固定发电运行遇风泵打风时，只有___能吸合。
【单选题】
东风7C型机车运行中突然卸载，电器失电顺序是___。
A. LLC→LC→C1～C6
B. C1～C6→LC→LLC
C. LC→C1～C6→LLC
【单选题】
东风7C型机车启机按下AN1，QC不吸合的原因有___。
A. FLC反联锁不良
B. QBC正联锁不良
C. QC正联锁不良
【单选题】
东风7C型机车启机时，QD转动，柴油机不爆发的原因有___。
A. Rdls断路
B. YK4故障
C. DLS故障
【单选题】
东风7C型机车QD不发电的原因有___。
A. ZK1跳开
B. ZK2跳开
C. ZK12跳开
【单选题】
东风7C型机车电流表显示放电，电压表显示96V的原因是___。
A. RD1熔断
B. RD2熔断
C. RD3熔断
【单选题】
东风7C型机车加载运行中，牵引发电机电压应不超过___。
【单选题】
东风7C型机车运用中抱轴瓦温度不得高于___
【单选题】
柴油机冒蓝烟的主要原因是因为___进入燃烧室参加燃烧而随废气排出造成的。
【单选题】
东风8B型内燃机车柴油机装车功率为___kw。
【单选题】
东风8B型机车扫石器距轨面的高度为___mm。
推荐试题
【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
【单选题】
Lightning is a ______ of electrical current from a cloud to the ground or from one cloud to another.___
A. rush
B. rainbow
C. rack
D. ribbon
【单选题】
I caught a ________ of the taxi before it disappeared around the corner of the street.___
A. vision
B. glimpse
C. look
D. scene
【单选题】
Students or teachers can participate in excursions to lovely beaches around the island at regular _________.___
A. gaps
B. rate
C. length
D. intervals
【单选题】
Physics is ________ to the science which was called natural philosophy in history.___
A. alike
B. equivalent
C. likely
D. uniform
