【判断题】
BSP青藏车冷凝水管橡胶管应每年(或每运行400000km)检查一次,在每年夏天第一次使用空调时检查
A. 对
B. 错
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A
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【判断题】
BSP青藏车电开水炉红灯连续闪烁说明进水时间过长
A. 对
B. 错
【判断题】
BSP青藏车使用污水箱紧急排放时,允许短时间内瞬间多次操作按钮开关
A. 对
B. 错
【判断题】
BSP青藏车当污物箱小箱体内污物满时,则在污物箱大箱体中形成真空,小箱体通大气,从而将污物通过止回阀排放到污物箱大箱体中
A. 对
B. 错
【判断题】
BSP青藏车用压缩空气清洁冷凝器,从与气流方向相同的方向吹入压缩空气
A. 对
B. 错
【判断题】
BSP青藏车塞拉门使用的润滑油脂为2号低温润滑脂
A. 对
B. 错
【判断题】
BSP青藏车的车长是25500mm
A. 对
B. 错
【判断题】
BSP青藏硬座车上有1组灭火器
A. 对
B. 错
【判断题】
BSP青藏硬卧车(带残疾人厕所)可载客54人
A. 对
B. 错
【判断题】
BSP青藏车装窗时,要求气囊中气压低于0.45个大气压
A. 对
B. 错
【判断题】
BSP青藏车制氧机压缩机供电为AC380V
A. 对
B. 错
【判断题】
BSP青藏车综合柜PLC电池需要每5年更换一次
A. 对
B. 错
【判断题】
BSP青藏车综合柜安全监控触摸屏可以设置烟火报警时切断DC600V电源
A. 对
B. 错
【判断题】
BSP青藏车每个车端设4个DC600V电力连接器
A. 对
B. 错
【判断题】
BSP青藏车上配线用尼龙软管阻燃级别为UL-94,V2级
A. 对
B. 错
【判断题】
BSP青藏车AV影视柜的视频解码器采用定置方式是为了美观
A. 对
B. 错
【判断题】
线槽内DC110V电缆和DC600V电缆是绑在一起的
A. 对
B. 错
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KAX-1客车行车安全监测诊断系统尽量采用了较为先进成熟的技术,应用软硬件可靠性设计,功能级监测节点的传感器免标定免维护
A. 对
B. 错
【判断题】
车载安全监测诊断系统由连接同一列车上不同车厢的列车网络(列车总线)TBUS和连接同一车厢内不同功能级监测诊断子系统的车厢网(车厢总线)VBUS所组成
A. 对
B. 错
【判断题】
车载安全监测诊断系统的监测与诊断报告目前通过列车管理器以串口通信方式传送给电控主站PLC,由PLC向地面实时报告安全监测状态
A. 对
B. 错
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车载安全监测诊断系统不能用移动存储器通过USB接口实现列车停站数据下载等功能
A. 对
B. 错
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应急电源单相半控桥式整流电路中,若一只二极管击穿造成内部短路也能正常工作,只是成了半波整流
A. 对
B. 错
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KSL电茶炉加热管工作靠三相电源380V,若三根加热管功率依次为750W、700W、800W时,中性线可以去除
A. 对
B. 错
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三端稳压器要求对参考地输出+5V电压可选用7805
A. 对
B. 错
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空调客车对客室相对湿度的要求是夏季不大于70%,冬季不小于30%
A. 对
B. 错
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锗二极管死区电压为0.1V,导通电压为0.3V
A. 对
B. 错
【判断题】
硅二极管死区电压为0.5V,导通电压为0.7V
A. 对
B. 错
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运算放大器的“+”表示正电压输入端
A. 对
B. 错
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运算放大器的“-”表示反相输入端
A. 对
B. 错
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场效应管的输入阻抗比三极管要高
A. 对
B. 错
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981型应急电源在对电池充电时,若锯齿波与电源频率不同步会造成充电电流不稳
A. 对
B. 错
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当发生有人触电需要采取急救措施时,发现有心跳无呼吸应采取胸部挤压法
A. 对
B. 错
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接零保护与接地保护可以使用在同一电网中
A. 对
B. 错
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A. 对
B. 错
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交流接触器衔铁和铁芯用硅钢片冲制后铆接而成,主要目的是为了减小磁滞与涡流损耗
A. 对
B. 错
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交流接触器短路环的作用是防止交流电磁吸力周期变化而引起铁芯的振动和噪声
A. 对
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A. 对
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热继电器主要用于电动机的过流保护
A. 对
B. 错
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使用热继电器时应将热驱动器件的电阻丝并联在电动机的主电路中
A. 对
B. 错
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热继电器动作时间与通过电流的关系为定时限特性,即通过电流愈大,动作时间愈快
A. 对
B. 错
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继电器与接触器工作原理基本相同,主要区别是触头系统不同,故应用也不同
A. 对
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【单选题】
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【单选题】
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【单选题】
Q2: Why did some stores open at midnight on Thanksgiving night?___
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【单选题】
Q3: How many Black Friday shoppers were reported to go to the shops at midnight this year?___
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【单选题】
Q4: What can we learn about the 15-year-old Jenny?___
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Q1: Why did the woman decide to do a triathlon?___
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【单选题】
Q2: When did the man first do a triathlon?___
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【单选题】
Q3: How does the man feel about running?___
A. Boring.
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Q1: What is the ratio of positive to negative emotions that can make a person happier?___
A. 1:3.
B. 3 :1.
C. 1 :10 .
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【单选题】
Q2: What is the most exciting finding about increasing positive emotions?___
A. It improves relationships .
B. It leads to greater success .
C. It helps develop creativity .
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Q3: What does the speaker say about negative feelings?___
A. People should turn every negative feeling  around .
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【单选题】
Q4: What is the main idea of the passage?___
A. People should learn to manage their  emotions .
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D. People should identify as many positive  feelings as possible .
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Q1: What are the man and woman talking about?___
A. Whether nature is magical and kind .
B. Whether nature is powerful and full of risks .
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【单选题】
Q2: What can we learn about Christopher?___
A. He made a film about his trip to Alaska .
B. He wrote a story about his trip to Alaska .
C. He died while having an adventure in Alaska .
D. He learned how powerful and risky Alaska was .
【单选题】
Q3: What does the woman think about Christopher taking the trip to Alaska?___
A. He was too foolish .
B. He was really romantic .
C. He had a very kind heart .
D. He had a spirit for trying things .
【单选题】
Q4: Which of the following is NOT mentioned as something that would have saved Christopher’s life?___
A. A gun to hunt .
B. The map of the area .
C. Emergency food supplies .
D.
E. mergency communication equipment .
【单选题】
Q1: What speed can an avalanche reach within five seconds of taking off?___
A. At 8 miles an hour .
B. At 18 miles an hour .
C. At 80 miles an hour .
D. At 88 miles an hour .
【单选题】
Q2: According to the passage, under what circumstances may an avalanche occur?___
A. There are too many layers of snow on the  .
B. There is a layer of snow covering an entire  area .
C. The top layer of snow slides off the layer  below it .
D. The layer of snow below the surface  becomes unstable .
【单选题】
Q3: What are skiers advised to do to avoid being caught in an avalanche?___
A. Ski only in the official ski areas .
B. Look for solid snow to walk on .
C. Look out for each other while skiing .
D. Learn to control themselves in an  avalanche .