【单选题】
25T型客车检修规程规定:DC600V车下充电机箱检修,当蓄电池电压为DC48V时,充电机工作时输出电压为DC56~58V,电池欠压保护动作值为_______,恢复值为62V±1V,欠压电路控制良好。___
A. 39V±1V
B. 40V±1V
C. 42V±1V
D. 45V±1V
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相关试题
【单选题】
DC600V车下充电机箱检修规定:当蓄电池电压为DC48V时,充电机工作时输出电压为DC56~58V,充电限流值为_______。___
A. 8A±1A
B. 10A±1A
C. 12A±1A
D. 14A±3A
【单选题】
25T型客车检修规程规定:对于空调试验,满负载运行1h以上,测量控制柜各接线端子温度须符合以下要求:接线处温度不得高于环温35℃或实测温度不得高于_______。___
A. 50℃
B. 60℃
C. 70℃
D. 80℃
【单选题】
25T型客车检修规程规定:对于空调试验,同一电器三相接线处温度差不得高于_______。___
A. 15℃
B. 20℃
C. 25℃
D. 30℃
【单选题】
25T型客车检修规程规定:对于空调试验,同一接线排各通电接头温度差不得高于_______。___
A. 20℃
B. 25℃
C. 30℃
D. 35℃
【单选题】
25T型客车检修规程规定:对于空调试验,外温22℃以上时,运转30min之内,外温与出风口处温差不大于_______。___
A. 12℃
B. 10℃
C. 13℃
D. 15℃
【单选题】
25T型客车检修规程规定:对于轴温报警器的控制显示器测试,测试功耗不大于_______。___
【单选题】
25T型客车检修规程规定:对于轴温报警器的控制显示器检修,DC110V或DC48V电源电压在-30%~+25%电压波动范围内控制显示器须正常工作,整机显示温度与母表偏差为_______。___
A. ±2℃
B. ±4℃
C. ±5℃
D. ±6℃
【单选题】
25T型客车检修规程规定:对于轴温报警器的数字传感器的检测,常态下用500V兆欧表测试绝缘,绝缘电阻须大于_______。___
【单选题】
25T型客车检修规程规定:对于轴温报警器的数字传感器的检测,浸水72h后,用500V兆欧表测试绝缘,绝缘电阻须大于_______。___
A. 400
B. 600
C. 800
D. 1M
【单选题】
25T型客车检修规程规定:对于KAX-1型客车行车安全监测诊断系统传感器检测,制动监测压力传感器在100kPa压力下,压力传感器输出电流应为_______。___
A. 3.92~4.05mA
B. 5.52~5.68mA
C. 7.12~7.28mA
D. 8.72~8.88mA
【单选题】
25T型客车检修规程规定:对于KAX-1型客车行车安全监测诊断系统传感器检测,制动监测压力传感器在200kPa压力下,压力传感器输出电流应为_______。___
A. 3.92~4.05mA
B. 5.52~5.68mA
C. 7.12~7.28mA
D. 8.72~8.88mA
【单选题】
25T型客车检修规程规定:对于KAX-1型客车行车安全监测诊断系统传感器检测,制动监测压力传感器在300kPa压力下,压力传感器输出电流应为_______。___
A. 3.92~4.05mA
B. 5.52~5.68mA
C. 7.12~7.28mA
D. 8.72~8.88mA
【单选题】
25T型客车检修规程规定,测量DC600V电力配线绝缘电阻值应使用_______级兆欧表。___
A. 100V
B. 250V
C. 500V
D. 1000V
【单选题】
25T型客车检修规程规定,测量AC380V电力配线绝缘电阻值应使用_______级兆欧表。___
A. 100V
B. 250V
C. 500V
D. 1000V
【单选题】
25T型客车检修规程规定,测量DC110V/DC48V电力配线绝缘电阻值应使用_______级兆欧表。___
A. 100V
B. 250V
C. 500V
D. 1000V
【单选题】
25T型客车检修规程规定,用500V级兆欧表测量DC110V隔离变压器的绝缘电阻值应大于_______。___
【单选题】
25T型客车检修规程规定,用1000V级兆欧表测量AC380V隔离变压器的绝缘电阻值应大于_______。___
【单选题】
25T型客车检修规程规定,测量AC380V隔离变压器的绝缘电阻值应使用_______级兆欧表。___
A. 100V
B. 250V
C. 500V
D. 1000V
【单选题】
25T型客车检修规程规定,用500V级兆欧表测量AC220V电伴热其绝缘电阻值为_______。___
A. 冷态≥20M,热态≥10M
B. 冷态≥200M,热态≥20M
C. 冷态≥200M,热态≥10M
D. 冷态≥100M,热态≥20M
【单选题】
集中供电的硬座、软座、软卧、餐车,采用荧光灯照明时的平均照度应不低于_______。___
A. 80lx
B. 100lx
C. 120lx
D. 150lx
【单选题】
25T型客车检修规程规定,用500V级兆欧表测量AC220V电热管其绝缘电阻值为_______。___
A. 冷态≥20M
B. 冷态≥100M
C. 冷态≥200M
D. 冷态≥400M
【单选题】
25T型客车检修规程规定,用500V级兆欧表测量通信系统配线,相对湿度<60%时其绝缘电阻应_______。___
A. ≥0.5M
B. ≥1M
C. ≥10M
D. ≥20M
【单选题】
采用集中供电的硬卧车,荧光灯照明的平均照度应不低于_______。___
A. 80lx
B. 100lx
C. 120lx
D. 150lx
【单选题】
25T型客车检修规程规定,用500V级兆欧表测量通信系统配线,相对湿度为60%~85%时其绝缘电阻应为_______。___
A. 1~3M
B. 0.3~1M
C. 3~5M
D. 0.5~3M
【单选题】
TFX1防滑器系统的速度传感器与轴头齿轮之间的间隙为_______。___
A. 1.0mm±0.2mm
B. 1.0mm±0.5mm
C. 1.5mm±0.2mm
D. 1.5mm±0.5mm
【单选题】
25T型客车检修规程规定,用500V级兆欧表测量通信系统配线,相对湿度>85%时其绝缘电阻应_______。___
A. ≥0.3M
B. ≥10M
C. ≥20M
D. ≥30M
【单选题】
25K型空调客车的空调控制柜[KLC40C-1T1]中12号线是_______控制线。___
【单选题】
25K型空调客车的空调控制柜[KLC40C-1T1]中KA1~KA2,KA5~KA6是高灵敏、_______继电器。___
A. 高电压
B. 普通
C. 高内阻
D. 小电流
【单选题】
属于运用客车质量鉴定A类故障的是_______。___
A. 坐席安装松动合计不超过2件
B. 坐席标号不准确
C. 坐席破损
D. 缺少坐席
【单选题】
电茶炉配件损坏影响使用的在运用客车质量鉴定中属于_______故障。___
【单选题】
车辆外墙油漆脱离累计_______在运用客车质量鉴定中属于C类故障。___
A. 100mm×100mm
B. 200mm×200mm
C. 300mm×300mm
D. 400mm×400mm
【单选题】
轴温报警装置未联网的在运用客车质量鉴定中属于_______故障。___
【单选题】
在客车辅修时,制动盘整体厚度应不小于_______。___
A. 94mm
B. 96mm
C. 97mm
D. 98mm
【单选题】
在客车A1级检修时,应急电源电池电压低于_______时,欠压保护须起作用。___
A. 40V±1V
B. 42V±1V
C. 44V±1V
D. 45V±1V
【单选题】
在客车辅修质量对规中缓解阀作用不良,扣_______。___
【单选题】
在客车辅修质量对规中轴箱裂纹,每处扣_______。___
【单选题】
在客车A1级检修质量对规中电子防滑器单车静止试验出现故障显示,扣_______。___
A. 10分
B. 20分
C. 30分
D. 40分
【单选题】
25T型客车检修规程规定,用兆欧表测量电力配线,相对湿度为60%~85%时其绝缘电阻应为_______。___
A. ≥2M
B. 2~0.38M
C. ≥0.38M
D. ≥10M
【单选题】
在客车A1级检修质量对规中灯具点灯试验不良,每处扣_______。___
【单选题】
25T车的可编程控制器[简称PLC]供电后,绿色_______灯亮,橙色RUN灯亮,红色ERR灯灭;连接触摸屏或网关后橙色COM灯闪烁。___
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- I heard Susan surprised her teacher by working hard. Yes, ___
A. her teacher worked hard.
B. Susan worked hard.
C. the teacher was surprising.
D. Susan was surprised.
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I don't know ____ to deal with such matter.
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___ is your girl friend like? She is very kind and good-looking.
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He ___ driving me home, even though I told him I lived nearby.
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I didn’t know what to do, but then an idea suddenly ___to me.
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A pair of spectacles ___ what I need at the moment.
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You had better ___ a doctor as soon as possible.
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The boy is not happy at the new school. He has ___ friends there.
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I fell and hurt myself while I ___ basketball yesterday.
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Nancy is considered to be ____ the other students in her class.
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It's _____ that he was wrong.
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There ____ a book and some magazines on the desk.
A. is
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She is not only my classmate _____ also my good friend.
A. or
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He asked the waiter ___ the bill.
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_____ you are leaving tomorrow, we can have dinner together tonight.
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_____ she survived the accident is miracle.
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