【填空题】
105.LKJ-2000监控装置实施紧急制动控制后,必须___后才可缓解。
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相关试题
【填空题】
106.警惕键可解除降级状态下的报警,也可在防溜工况下,解除___的报警。
【单选题】
HXD3电力机车辅助电气系统采用___组辅助变流器。
A. 一
B. 二
C. 三
【单选题】
HXD3电力机车牵引电机采用由___进风的独立通风冷却方式。
A. 车内
B. 车底
C. 顶盖百叶窗
【单选题】
HXD3电力机车主变流器采用___由车顶直接进风冷却水、油复合式铝板冷却器。
A. 水冷
B. 油冷
C. 风冷
【单选题】
HXD3电力机车主变压器___由车顶直接进风冷却水、油复合式铝板冷却器。
A. 水冷
B. 油冷
C. 风冷
【单选题】
HXD3电力机车辅助变流器也采用___进风冷却的方式。
A. 车内
B. 车外
C. 车底
【单选题】
HXD3电力机车单机(轴重25t)以120km/h在平直道上施行紧急空气制动时,最大制动距离小于___m。
A. 800
B. 900
C. 1100
【单选题】
HXD3电力机车在半径___m的曲线上能进行正常摘挂作业。
A. 150
B. 250
C. 300
【单选题】
HXD3电力机车牵引控制司机控制器手柄为___级,级间能平滑调节。
A. 10
B. 12
C. 13
【单选题】
HXD3电力机车制动控制司机控制器手柄为___级,级间能平滑调节。
A. 10
B. 12
C. 13
【单选题】
HXD3电力机车牵引电动机用冷却风机中的惯性分离过滤器在牵引风机的___使用。
A. 排风侧
B. 进风侧
C. 中部
【单选题】
HXD3电力机车空气压缩机的冷却器是吸收车内的空气,向___直接排气。
A. 车内
B. 车顶
C. 车外(地板下)
【单选题】
HXD3电力机车有___个并联的回流装置 EB1~EB6,从轮对回流至钢轨。
A. 2
B. 4
C. 6
【单选题】
HXD3电力机车高压隔离开关采用电空控制方式进行转换的。当一台受电弓发生故障接地时,可通过控制电器柜上的隔离开关 SA___,将其打至对应隔离位。
A. 95
B. 96
C. 98
【单选题】
HXD3电力机车高压电压互感器次边输出通过保护用的自动开关 QA___,分别送到主变流器UM1和主变流器UM2的控制单元,作为主变流器控制的同步信号使用。
A. 1
B. 2
C. 3
【单选题】
HXD3电力机车低压电流互感器TA___是为电度表的计量提供电流输入,为机车微机控制系统提供原边电流信号,用于原边电流显示。
A. 1
B. 2
C. 3
【单选题】
HXD3电力机车高压接地开关QS10上配有1把蓝色钥匙和___把黄色钥匙。
A. 1
B. 2
C. 3
【单选题】
HXD3电力机车将蓝色钥匙插入接地开关 QS10 并向右旋转至___位,保证车顶设备可靠接地。
A. 运行
B. 中间
C. 接地
【单选题】
HXD3电力机车主变压器的___个1450V牵引绕组分别用于两套主变流器的供电。
A. 2
B. 4
C. 6
【单选题】
HXD3电力机车主变压器___个399V辅助绕组分别用于辅助变流器的供电。
A. 1
B. 2
C. 4
【单选题】
HXD3电力机车每组牵引变流器分别有___个接触器。
A. 1
B. 2
C. 3
【单选题】
HXD3电力机车主接地保护电路由跨接在中间回路的___个串联电容和一个接地信号传感器组成。
A. 两
B. 四
C. 六
【单选题】
HXD3电力机车主变流器含有___套独立的接地保护电路,可以分别对3组牵引变流器进行接地监测和保护。
A. 一
B. 二
C. 三
【单选题】
HXD3电力机车牵引绕组过流故障在3分钟内连续发生___次,故障将被锁定,必须切断 CI 控制电源,才能恢复正常。
A. 两
B. 三
C. 四
【单选题】
HXD3电力机车主电路某一点接地时则形成回路,接地检测回路有故障电流流过,传感器输出电流信号,使保护装置动作,其动作保护值为___A。
A. 5
B. 8
C. 10
【单选题】
HXD3电力机车当原边网压高32kV且持续___ms 或者是高于35kV且持续1ms时,CI 实施保护。
A. 3
B. 5
C. 10
【单选题】
HXD3电力机车当原边网压低于16kV且持续___ms时, CI 实施保护。
A. 3
B. 5
C. 10
【单选题】
HXD3电力机车库内电源通过单相插座送到___位牵引电动机的牵引变流器环节,进行库内动车作业。
A. 一、六
B. 二、五
C. 三、四
【单选题】
HXD3电力机车正常情况下,辅助变流器UA11、UA12基本上以___%的额定容量工作。
A. 40
B. 50
C. 60
【单选题】
HXD3电力机车当某一套辅助变流器发生故障时,允许___压缩机可以投入工作。
A. 两台
B. 操纵端
C. 非操纵端
【单选题】
HXD3电力机车辅助变流器的过流和过载保护故障消除后___s内自动复位。
A. 3
B. 5
C. 10
【单选题】
HXD3电力机车辅助变流器输入回路中的过流和过载保护故障在___分钟内连续发生两次,该辅助变流器将被锁死。
A. 2
B. 3
C. 5
【单选题】
HXD3电力机车辅助电动机回路过载保护动作故障在2分钟内连续发生___次,该辅助变流器将被锁死。
A. 2
B. 4
C. 6
【单选题】
HXD3电力机车最多可以实施同型号的___台机车重联。
A. 2
B. 4
C. 6
【单选题】
当HXD3电力机车速度大于等于___km/h,且机车未实施空气制动时,可进行“定速控制”操作。
A. 10
B. 15
C. 20
【单选题】
HXD3电力机车进入“定速控制”状态后,实际速度大于“目标速度___km/h”时, TCMS控制机车进入电气制动工况。
A. 1
B. 2
C. 3
【单选题】
HXD3电力机车进入“定速控制”状态后,司机控制器调速手柄的级位变化超过___级以上时,机车“定速控制”状态自动解除。
A. 1
B. 2
C. 3
【单选题】
HXD3电力机车制动缸压力高于___kPa时,踏面清扫投入。
A. 50
B. 100
C. 150
【单选题】
HXD3电力机车制动缸压力低于___kPa 时,踏面清扫解除。
A. 50
B. 30
C. 20
【单选题】
HXD3电力机车为防止损坏辅助压缩机,辅助压缩机打风时间不得超过___分钟。
A. 3
B. 5
C. 10
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The largest minority in the United States is the .
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is located on the U. S. –Canadian border between Lake Erie and Lake Ontario.
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Some of the world famous universities like Harvard, Yale and MIT are located .
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The largest river in the U. S. is .
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The U. S. lies in North America, with Canada to the north, Mexico to the south, the Atlantic to its and the Pacific to its .
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The state of is the largest in area of all the states.
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A. A. 50
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A. A. Samuel Beckett
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is NOT included in the modernist group.
A. A. Oscar Wild
B. B. Virginia Woolf
C. C. William Butler Yeats
D. D. T. S. Eliot
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Of the following statements, is NOT correct in terms of Neo-Romanticism.
A. A. It prevailed at the end of the 19th century.
B. B. The writers were dissatisfied with the social reality.
C. C. The writers believed in “Art for Art’s Sake”.
D. D. Treasure Island was a representative work.
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is a representative of English Critical Realism at the turn of the 19th century.
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C. Joseph Conrad
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Of Dickens’ novels, is considered autobiographical.
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C. C. Oliver Twist
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is viewed as Romantic poetry’s “Declaration of Independence.”
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Of the following, is NOT a common feature of all the British holidays.
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is Britain’s top pay television provider.
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Life on Earth is a kind of program produced by the BBC and is popular among 500 million viewers worldwide.
A. A. feature
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C. C. documentary
D. D. soap opera
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Among Britain’s quality press, the following newspapers are regarded as the “Big Three” with the exception of .
A. A. The Times
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To be admitted to the Open University, one need .
A. A. some educational qualifications
B. B. no educational qualifications
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D. D. General National Vocational Qualifications
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Of the following, is NOT a basis of admission to Britain’s universities.
A. A. result in national entrance test
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Partially funded by central government grants, the British univPartially funded by central government grants, the British universities receive their remaining funds from all the following sources except .
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About of British children receive primary and secondary education through the independent system.
A. A. 5%
B. B. 6%
C. C. 7%
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In Britain, the division between grammar schools and vocational schools were ended by the introduction of comprehensive schools in the .
A. A. 1930s
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D. D. 1960s
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C. 马克思和恩格斯创立的基本理论、基本观点和基本方法构成的科学体系
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