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【判断题】
HXD3电力机车电流互感器 TA1是为电度表的计量提供电流输入,属于测量用互感器。
A. 对
B. 错
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答案
B
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相关试题
【判断题】
智能型电度表 PWH,通过采集原边低压电流互感器 TA2 和高压电压互感器 TV1 提供的电流和电压信号来实现机车牵引、再生电能的计量。
A. 对
B. 错
【判断题】
HXD3电力机车黄色钥匙用于控制受电弓的升弓气路。
A. 对
B. 错
【判断题】
HXD3电力机车黄色钥匙用于打开机械室天窗或高压电器柜门。
A. 对
B. 错
【判断题】
HXD3电力机车6组牵引变流器的主电路和控制电路相对独立,分别为6个牵引电动机提供交流变频电源。
A. 对
B. 错
【判断题】
当HXD3电力机车6组牵引变流器其中一组或几组发生故障时,通过 TCMS 微机显示屏,利用触摸开关将故障的牵引变流器切除,剩余单元仍可继续工作。
A. 对
B. 错
【判断题】
当HXD3电力机车整台机车的 6 个轴的轮径差、轴重转移及空转等可能引起的负载分配不均匀时,可以通过牵引变流器的控制进行适当的补偿。
A. 对
B. 错
【判断题】
HXD3电力机车辅助变流器采用软起动方式进行起动,除空气压缩机电动机外,其他辅助电动机也随之起动。
A. 对
B. 错
【判断题】
HXD3电力机车辅助变流器UA11、UA12内部,分别设有2套接地保护装置。
A. 对
B. 错
【判断题】
对应的接地故障转换开关置“中立位”。
A. 对
B. 错
【判断题】
HXD3电力机车辅助变流器将被锁死后,必须切断辅助变流器的控制电源,才可解锁。
A. 对
B. 错
【判断题】
HXD3电力机车每组辅助变流器,均可向110V充电模块提供DC350电源。
A. 对
B. 错
【判断题】
HXD3电力机车辅助变流器向110V充电模块输出电源回路通过熔断器DF进行短路过载保护。
A. 对
B. 错
【判断题】
HXD3电力机车熔断器DF出现熔断后,辅助变流器将通知微机控制系统TCMS,进行110V 充电模块输入电源的转换。
A. 对
B. 错
【判断题】
当HXD3电力机车压缩机进行低温加热时,压缩机可以正常工作。
A. 对
B. 错
【判断题】
HXD3电力机车复合冷却器上部为水散热器,用于冷却变流器,下部为油散热器,用于冷却主变压器。
A. 对
B. 错
【判断题】
HXD3电力机车在网压31kV~31.3kV范围内机车功率线性下降至零。
A. 对
B. 错
【判断题】
HXD3电力机车在网压22.5kV~17.5kV和17.5kV~17.2kV范围内机车功率按相同斜率线性下降。
A. 对
B. 错
【判断题】
HXD3电力机车车体侧面不设进风口,以提高车体作业的效率。
A. 对
B. 错
【判断题】
HXD3电力机车复合冷却器采用油冷对主变压器冷却。
A. 对
B. 错
【判断题】
HXD3电力机车采用水冷复合冷却器采用油冷对主变流装置冷却。
A. 对
B. 错
【判断题】
HXD3电力机车空气压缩机的冷却风通过设置在风道内的转换叶片,进行机械室回流。
A. 对
B. 错
【判断题】
HXD3电力机车电度表既可查询近期每天的电能消耗及能量的反馈,还可查询当时的原边电压.电流及功率因数等。
A. 对
B. 错
【判断题】
HXD3电力机车中间直流电路取消了二次滤波电路,它是通过逆变器的软件控制,来消除二次谐波电压的影响,大幅度抑制牵引电机电流脉动现象和转矩脉动现象。
A. 对
B. 错
【判断题】
HXD3电力机车牵引逆变器采用矢量控制模式,使异步牵引电动机具有快速反应的动态性能,实现了机车每个牵引电动机的独立控制。
A. 对
B. 错
【判断题】
HXD3电力机车共设置有2套辅助变流器UA11、UA12(又称作APU1、APU2),分别同2套主变流器UM1.UM2安装在一起。
A. 对
B. 错
【判断题】
HXD3电力机车每一台辅助变流器的额定容量不能带动整车辅机启动。
A. 对
B. 错
【判断题】
HXD3电力机车辅助变流器的故障转换控制由机车微机控制系统(TCMS)自动完成。
A. 对
B. 错
【判断题】
HXD3电力机车辅助变流器的中间直流回路同时给110V电源充电模块供电。
A. 对
B. 错
【判断题】
HXD3电力机车辅助变流器UA12的输出还经隔离变压器,给司机室各加热设备及低温预热回路供电。
A. 对
B. 错
【判断题】
HXD3电力机车辅助变流器内设有元器件过压、过流保护。
A. 对
B. 错
【判断题】
HXD3电力机车特性控制:采用恒牵引力/制动力+准恒速特性控制,实现对机车的控制要求。
A. 对
B. 错
【判断题】
HXD3电力机车机车故障复位按钮SB61(SB62)为自锁式按钮。
A. 对
B. 错
【判断题】
机车主变流器装置的控制主要是按照司机控制器给定指令,由TCMS通过通讯线传递给主变流器控制单元,按照机车牵引制动特性曲线,完成对牵引电动机的控制。
A. 对
B. 错
【判断题】
HXD3电力机车辅助压缩机起动打风后,当气压达到735±20kPa时辅助压缩机自动停止工作。
A. 对
B. 错
【判断题】
正常情况下,HXD3电力机车低温预热开关QA56不允许闭合,否则会造成蓄电池溃电。
A. 对
B. 错
【判断题】
HXD3电力机车撒砂低压试验时,分别将换向手柄置“前”、“后”位,脚踩撒砂开关SA83(SA84),确认撒砂装置作用良好。
A. 对
B. 错
【填空题】
1.HXD3电力机车轴列式为___。
【填空题】
2.HXD3电力机车电传动系统为___传动。
【填空题】
3.HXD3电力机车采用微机网络控制系统,实现了逻辑控制、___功能, 而且实现了机车的网络重联功能。
【填空题】
4.HXD3电力机车电气屏柜和各种辅助机组分功能___布置在中间走廊的两侧。
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劳动人民取得政权以后首先需要 ___
A. 进行阶级斗争
B. 实行按劳分配
C. 建立社会主义公有制
D. 尽快过渡到共产主义社会
【单选题】
在国家存在的情况下,社会占有生产资料所采取的形式是 ___
A. 国家所有制
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A. 社会总产品
B. 生产资料
C. 消费资料
D. 社会财富
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D. 社会化的生产力
【单选题】
马克思主义政党的最高纲领和最终奋斗目标是 ___
A. 建立社会主义制度
B. 实现共产主义
C. 成为社会主义事业的领导核心
D. 使工人阶级成为统治阶级
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历史上最广泛、最彻底、最深刻的,不同于以往一切革命的最新类型的革命是 ___
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explore ,transmit, resource, emerge,yield, pose, assume, confidence,inherit, comprehensive Given the chance to show his ability, he regained [ ]and began to succeed in school
【填空题】
take a toll on,in other words ,drop out,in turn ,at risk (of) ,interfere with,be accustomed to, contribute to,cut back on ,hold on to The new government has committed to [ ] emissions of greenhouse gases
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take a toll on,in other words ,drop out,in turn ,at risk (of) ,interfere with,be accustomed to, contribute to,cut back on ,hold on to My parents do not object to my taking part-time jobs, but they remind me not to let them [ ] my school work
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take a toll on,in other words ,drop out,in turn ,at risk (of) ,interfere with,be accustomed to, contribute to,cut back on ,hold on to Anger, worry, disappointment, these negative emotions [ ] your heart, brain and body
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take a toll on,in other words ,drop out,in turn ,at risk (of) ,interfere with,be accustomed to, contribute to,cut back on ,hold on to If a person adopts an unhealthy lifestyle, he will surely be [ ]developing diseases.
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take a toll on,in other words ,drop out,in turn ,at risk (of) ,interfere with,be accustomed to, contribute to,cut back on ,hold on to Most people were ready to give up on him when he [ ] of school, but later he returned and earned his degree
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take a toll on,in other words ,drop out,in turn ,at risk (of) ,interfere with,be accustomed to, contribute to,cut back on ,hold on to Drinking too much can increase the risk of developing high blood pressure, which [ ] can lead to heart attack or stroke
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take a toll on,in other words ,drop out,in turn ,at risk (of) ,interfere with,be accustomed to, contribute to,cut back on ,hold on to Low-cost airlines are emerging all over Asia; this will [ ]the development of the worlds air-travel market as a whole
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take a toll on,in other words ,drop out,in turn ,at risk (of) ,interfere with,be accustomed to, contribute to,cut back on ,hold on to When you move to a new country, you may find the food there strange and you may miss the familiar smells of the food [ ] in your country
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take a toll on,in other words ,drop out,in turn ,at risk (of) ,interfere with,be accustomed to, contribute to,cut back on ,hold on to Although he kept trying and failing, I always [ ] the belief that he would succeed one day.
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take a toll on,in other words ,drop out,in turn ,at risk (of) ,interfere with,be accustomed to, contribute to,cut back on ,hold on to The tax only affects people with an annual income over $200,000-[ ], it will only attect the very rich.
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controversial,assess, resolve,decrease,alter,abandon,indicate,undermine,compromise, conventional They are such a(n) [ ] family- they must have been shocked when their son dyed(染) his hair pink,
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controversial,assess, resolve,decrease,alter,abandon,indicate,undermine,compromise, conventional Testing students by examinations has long been regarded as a reliable way to [ ]students'ability
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controversial,assess, resolve,decrease,alter,abandon,indicate,undermine,compromise, conventional Many power stations have been modernized to give off less pollution, or they were moved further away from the living areas in order to [ ] the damage,
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advocate,involve,confine,respond,subsequent ,distinct ,intense, fulfill,circumstance, reconcile She[ ] her ambition of becoming a fashion designer after years of hard work
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