【多选题】
述广播控制盒上电后的状态。___
A. 工作指示灯常亮
B. 激活端设备激活端指示灯常亮
C. 通信指示灯闪烁
D. Tc2端地址指示灯常亮
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答案
ABCD
解析
暂无解析
相关试题
【多选题】
简述空调机组在各工况下的运行情况。___
A. 通风: 仅两个通风机运行;
B. 半冷:两个通风机运转,两个冷凝风机运转,空调机组的一个压缩机运转;
C. 全冷:两个通风机运转,两个冷凝风机运转,空调机组的两个压缩机运转;
D. 半暖:两个通风机运转,空调机组的两台各一组电加热运行;
E. 全暖:两个通风机运转,空调机组两台共四组电加热全部运行。
【多选题】
辅助电源主电路包括哪些部分。___
A. 受电电路、输入滤波电路、电容器充放电电路、IGBT 逆变电路、
B. 输出变压器、交流滤波电路、输出接触器、信号检测电路、直流电源电路。
【多选题】
同时EDCU通过MVB网络将故障信息发送给列车控制单元,列车控制单元将存储车门故障信息,并显示在司机室显示屏上。车门故障信息主要包括几种。 ___
A. 门驱动电机电路断路。
B. 门关到位开关故障。
C. 收到开门命令后,门3s内没有解锁。
D. 门位置传感器故障。
E. 关门过程中,连续固定次数激活关门障碍检测。
F. 门未经许可离开锁闭位置
G. 门控通信中断。
H. 诊断存储器故障。EDCU输出口短路。
【多选题】
客室门系统锁闭单元各个工况下的工作过程?___
A. 关门状态下:制动盘与飞轮咬合,飞轮被制动,此时无法开门。
B. 电动开门时:电磁锁闭装置得电,齿轮盘与飞轮分离,丝杠和飞轮可以朝开门方向转动,实现开门。
C. 手动解锁时:可通过转动紧急操作装置拉动钢丝绳,在解锁板的作用下齿轮盘与飞轮分离,同时触发紧急解锁开关实现手动解锁。手动解锁后若要实现开门则紧急操作装置必需保持在“解锁”位。
【多选题】
正线车门切除的步骤。 ___
A. 若车门关闭手推门页确认车门已关好,若门没关好,先将紧急解锁手柄处于垂直位,手动将门打开到最大位置,然后再将紧急解锁手柄打至水平位,再手动关门,切勿用力过猛,否则容易导致门不能锁闭。
B. 向外用力推车门,确认车门已经关闭锁好,再用7号方孔钥匙顺时针操作隔离开关,将车门切除,检查对应车门盖板上红色指示灯,亮则继续运行,如不亮确认司机室内关门按钮绿色指示灯是否亮,亮则继续运行。
C. 如关门按钮绿色指示灯不亮,HMI显示门关好,合门关好旁路(=81-S110),听从行调指挥终点站或就近站退出服务。
【多选题】
简述报站广播(仅指自动报站或半自动报站)失效,怎么排除故障。___
A. 如果单节车厢有没广播则为功放设备故障;
B. 检查PISC模块上是否插有CF卡,并确认CF卡内有播音文件;
C. 检查PISC模块上的OCC指示灯、广播控制盒上的人工广播按键指示灯是否亮起;检查HMI上是否正处于紧急广播模式,以上情况均会造成无法报站广播;
D. 检查HMI上是否报告PIS系统故障或者检查TMS系统是否故障。
【多选题】
简述长沙地铁2号空压机不能起动时,可能存在的故障原因及维修方法。___
A. 检查车辆电机电源,确认是否为电机电源故障;
B. 检查电机电缆连接是否松脱;
C. 检查电机断路器是否跳闸,若跳闸先检查线路可能存在短路或漏电或过流保护问题,排除后合上断路器;
D. 检查压力控制器设定是否错误或本身是否故障,重新设定或更换压力控制器;
E. 用万用表检查电各相序之间的阻值,确认电机是否烧毁。
【多选题】
简述长沙地铁2号空压机在未达到工作压力之前,空气压缩机停机的可能存在的故障原因及维修方法。___
A. 车辆主风缸压力控制器是否故障或设定错误;
B. 检查电动机断路器是否跳闸,确认电动机供电电源是否有线路或电气故障
C. 检查风源系统压力控制器是否故障或设定错误。
【多选题】
空调机组产生高压保护的原因。___
A. 冷凝器过脏
B. 制冷剂充注过多
C. 轴流风机反转或不转
D. 排气管段堵塞
E. 空气或不凝性气体混入系统中
F. 热力膨胀阀被堵塞
【多选题】
哪些情况会导致空调机组处于关机模式?___
A. 当模式选择开关处于“关闭”档位,系统忽略来自MVB的命令信号处于关机模式;
B. 当模式选择开关处于“自动”档位时,系统接受到来自MVB的关机信号。
【多选题】
哪些情况会导致空调机组处于紧急通风模式?___
A. MVB正常,且收到“紧急通风”命令;
B. MVB故障,空调控制系统检测不到380V电源信号时(仅故障车进入紧急通风模式,而非故障车仍继续运行)。
【多选题】
试分析空调机组冷量不足的原因:___
A. 混合风滤尘网堵塞
B. 蒸发器、冷凝器过脏
C. 蒸发器结冰
D. 控制柜设定温度过高
E. 少量制冷剂泄漏
F. 制冷剂充注过多
G. 风量不足
【多选题】
试分析列车高压故障时,空调紧急通风的响应过程。___
A. 当功能选择开关处于“测试1、测试2、自动、22℃、24℃、26℃、28℃”档位时,若控制盘检测到主回路电源故障,控制器断开所有吸合的接触器,机组停止运行;
B. 延时10S,控制盘向紧急通风逆变器发送紧急通风信号,接触器EMFK吸合,送风机由紧急通风逆变器供电工作;
C. 当主回路电源恢复,控制盘取消紧急通风信号,接触器EMFK断开;主电路电源恢复后--延时5s,机组进入正常运行状态;
D. 若主回路电源一直未恢复,则紧急通风逆变器工作90min后,控制盘取消紧急通风信号,接触器EMFK断开,机组处于待机状态,直到电源恢复正常后机组重新运行。
【多选题】
有电无气如何升弓?___
A. 当蓄电池电压104v,主风缸风压<4.5bar时
B. 合=72-S101,激活列车
C. 合主控钥匙,司机台激活;
D. 按压受电弓升弓按钮;
E. 到B车升弓柜,用方孔钥匙打开柜门,取出脚踏泵,将两位三通阀旋钮打至垂直位置;
F. 踩压脚踏泵至气压5.5bar受电弓应升起,电客车所有照明(受电弓未升起时只有紧急照明)为正常照明,高压设备工作,压缩机打风,另一端的受电弓自动升起;
G. 将两位三通阀旋钮打至横向位,锁闭好柜门。
【多选题】
无电有气如何升弓?___
A. 当蓄电池电压<104v, 主风缸风压4.5bar
B. 到B车升弓柜,用方孔钥匙打开柜门
C. 将两位三通阀旋钮打至垂直位置,该端受电弓升起;
D. 司机按压司机室继电器柜中的=31-S104(充电机应急启动)至蓄电池电压104V后,(期间可尝试激活蓄电池)合=72-S101,激活列车;
E. 司机按压受电弓“升弓”按钮,受电弓保持升起;
F. 将两位三通阀旋钮打至横向位,锁闭好柜门。
【多选题】
无电无气如何升弓?___
A. 当控制电压<104v,主风缸风压<4.5bar
B. 到B车升弓柜,用方孔钥匙打开柜门,取出脚踏泵;
C. 将两位三通阀旋钮打至垂直位置
D. 司机操作脚踏泵至气压5.5bar,受电弓应升起;
E. 司机按压A车继电器柜面板上充电机应急启动按钮=31-S104 ,A车辅助逆变器风机启动;
F. 辅助逆变器开始工作并对蓄电池进行快速充电,此时合=72-S101,观察司机室蓄电池电压上升超过104V 且电压稳定;
G. 激活列车及司机室,按升弓按钮=21-S102 ,确认升弓显示灯按钮和HMI 显示屏上受电弓状态正确、网压显示正常,等待空压机打气完毕(主风缸气压升至9bar);
H. 将两位三通阀旋钮打至横向位,锁闭好柜门。
【多选题】
静调电源柜送电操作顺序。___
A. 静调电源柜电缆接头接到车间电源插座。
B. 合上车辆的列车激活开关。
C. 合上静调电源柜总控电源开关。
D. 打开电子锁使静调电源柜控制回路得电。
E. 按下合闸按钮,送电。
【多选题】
描述静调电源柜断电操作顺序。___
A. 按下静调电源柜分闸按钮。
B. 分断列车激活开关。
C. 断开电子锁使静调电源柜控制回路断电。
D. 断开静调电源柜总控电源开关。
E. 断开静调电源柜电缆接头与车间电源插座连接。
【多选题】
在年检作业中,如何检查高速断路器?___
A. 检查高速断路器无损坏、无污垢;
B. 底座螺栓防松线清晰无错位;
C. 高速断路器灭弧罩安装紧固螺栓防松线清晰无错位;
D. 辅助触点端盖内六角紧固螺栓防松线清晰无错位
E. 高速断路器进、出线排紧固螺栓齐全,防松线清晰无错位。
【多选题】
在年检作业中,如何检查接触器(KM1、KM2)状态?___
A. 拆下灭弧罩,灭弧罩应无机械损坏或金属粉尘,否则更换或清除;
B. 接触器主触头外观良好、动作灵活、安装紧固。
【多选题】
在年检作业中,如何检查牵引电机?___
A. 检查进气口和排气口,进、出风滤网紧固螺栓防松线清晰无错位;滤网无堵塞。
B. 检查牵引电机悬挂及电缆、电源盒状态,电机悬挂件防松线清晰无错位;电机机座无裂纹;电缆、电源盒外观无破损、放电烧痕,三相电缆固定螺栓无松动。
C. 检查温度传感器和速度传感器,速度传感器和温度传感器安装稳固,传感器线缆外观无破损、断裂现象。
D. 吹扫进气滤网和出气滤网,用压缩空气清洁进、出气滤网和联轴节。
E. 重新润滑轴承,用壳牌能得力(Shell RETINAX)LX2抗摩擦轴承润滑脂重新润滑深沟球轴承(约 19 g)、圆柱滚子轴承(约 16 g)。
【多选题】
试分析跳主断的原因? ___
A. 差分电流大于50A、充电超时、充电接触器(KM2)卡合、短接接触器(KM1)卡合;
B. 元件故障、硬件判断网压过压、硬件判断直流过压、硬件判断直流过流、斩波1过流、斩波2过流、电源故障、板不在位;
C. 软件判断网压过压、软件判断中间电压过压、MCU生命信号中断、主断线圈减载故障。
【多选题】
简述牵引系统技术术语和中文名称 ___
A. VVVF(牵引逆变器)、
B. SIV(辅助电源箱)、
C. TCMS(列车控制与监控系统)、
D. DCU(传动控制单元)、
E. HV(高压电器箱)、
F. L(滤波电抗器)、
G. BR(制动电阻)
【多选题】
电气牵引设备主要包括哪些,数量各是多少?___
A. 能耗记录仪箱(B车,共2个)、
B. 高压电器箱(B、C车,共4个)、
C. 滤波电抗器箱(B、C车,共4个)、
D. 牵引逆变器箱(B、C车,共4个)、
E. 制动电阻(B、C车,共4个)、
F. 牵引电机(B、C车,共16个)、
G. 接地装置(A、B、C车,共20个)、
H. 齿轮传动装置(B、C车,共4个)、司机控制器(A车,共2个)。
【多选题】
简述辅助系统组成及相应功能___
A. 逆变部分:辅助用电设备大都需要三相50 Hz,380 V/220 V交流电源,因而首先要将波动的直流网压逆变为恒压恒频的三相交流电。
B. 变压器隔离部分:为了安全必须将电网上的高压与低压用电设备,尤其是常需人工操作的控制电源的设备,在电气电位上实现隔离。通常采用变压器进行电气隔离,同时也可通过设计不同的匝比以满足电压值的需要。
C. 直流电源(兼作蓄电池充电器):车辆上各控制电器都由直流电源DC/DC供电。车辆上蓄电池为紧急用电所需,所以DC110 V控制电源同时也是蓄电池的充电器。
推荐试题
【单选题】
What happens to the status of users already logged into ESXi Shell when a vSphere administrator enables lockdown mode?___
A. Users remain logged in and can run commands, except to disable lockdown mode.
B. Users remain logged in and can run commands, including disabling lockdown mode.
C. Users are immediately logged out of ESXi Shell.
D. Users are logged out after a timeout specified by the vSphere administrator.
【单选题】
What is the effective vSphere licensing level during the 60 day evaluation period?___
A. vSphere Foundation Essentials Plus
B. vSphere Standard
C. vSphere Enterprise
D. vSphere
E. nterprise Plus
【单选题】
To comply with security requirements, an administrator with a vCenter Server Appliance needs to force logoff of the vSphere web client after 10 minutes of inactivity.What should the administrator do to meet the requirement?___
A. Edit: /var/lib/vmware/vsphere-client/webclient.properties, modify session.timeout=10
B. Edit: /opt/vmware/vsphere-client/webclient.properties, modify session.timeout=600
C. Edit: /var/lib/vmware/vsphere-client/webclient.properties modify session.timeout=600
D. Edit: /opt/vmware/vsphere-client/webclient.properties, modify session.timeout=10
【单选题】
An administrator enables High Availability (HA) on a Virtual SAN cluster.Which network is used for HA Network Heatbeat configuration?___
A. The Management network.
B. The vMotion network.
C. The Virtual SAN network.
D. The Provisioning Traffic network.
【单选题】
A user wants to monitor a business-critical virtual machine to ensure that it doesn't run out of resources. What metric could be monitored in vRealize Operations to address this concern?___
A. Time Remaining badge
B. Compliance badge
C. Reclaimable Waste badge
D. Density badge
【单选题】
An administrator has recently installed a new ESXi 6.x Host, and during the configuration notices sporadic network problems. To check whether the issue occurred sometime during the configuration, the administrator would like to reset the system.How can this be accomplished in the shortest amount of time?___
A. Run the ESXi installer again and reinstall the host.
B. Select the Reset System Configuration option from the vSphere Client when connected directly to the host.
C. From the
D. irect Console User Interface, select Reset System Configuration.
【单选题】
A vApp is running out of compute resources when overall activity is high within the resource pool. At other times, everything is fine.What should be done to resolve this issue?___
A. Increase the size of the resource pool Shares.
B. Set the vApp's CPU and Memory Reservation Type to Expandable.
C. Set the vApp's CPU and Memory Limit to Unlimited.
D. Create a new resource pool with the existing hardware configuration.
【单选题】
A virtual machine has been renamed and an administrator is unable to find files with the new virtual machine name in the datastore.What is the reason for this?___
A. The names of the files on the datastore do not change.
B. The names of the files on the datastore have been corrupted.
C. The virtual machine needs to be re-added to the inventory.
D. The Distributed Resource Scheduler moved the virtual machine to another host.
【单选题】
An administrator has configured network connectivity for a new virtual machine, as shown in the Exhibit.What will occur with the network traffic of this virtual machine when communicating externally from vSwitch1?___
A. The virtual machine will communicate on both uplinks
B. The virtual machine will only communicate on vmnic1
C. The virtual machine will only communicate on vmnic2
D. The virtual machine will fail to communicate externally
【单选题】
An administrator is unable to create the first group in a new vRealize Operations environment. What is the likely cause of the problem?___
A. There are no group types defined.
B. The group is not defined in SSO.
C. There are more than 32 group types defined.
D. The description for the group is not provided.
【单选题】
A new vApp was built and tested in the corporate headquarters datacenter running vSphere 6.x. What condition would explain why the virtual machine is failing to boot in an offsite datacenter running on vSphere 5.5?___
A. The virtual machine was built with the default hardware version.
B. The VMFS 5 datastore is not compatible with virtual machines configured with vSphere 6.x.
C. a
D. RS 5.5 cluster cannot run virtual machines configured with vSphere 6.x.
【单选题】
An administrator is evaluating whether to deploy vCenter Server on a Windows server or on a vCenter Server appliance. The administrator has the following requirements: <A web browser will be utilized to manage the vSphere environment.> <16 ESXi hosts will be deployed.> <Licenses must be shared with a vCenter Server at another site.> <An external Oracle 10g database server will be used to host the vCenter Server database.> Why will the administrator need to deploy vCenter Server on a Windows server?___
A. Linked Mode is a requirement for the solution.
B. Oracle 10g is a requirement for the solution.
C. The vSphere web client is a requirement for the solution.
D. Management of more than 5 hosts is a requirement for the solution.
【单选题】
What is a benefit of using VMware Data Protection ?___
A. Provides support for guest-level backups and restores of Microsoft SQL Servers, Exchange Servers, and Share Point Servers.
B. Provides support for advanced storage services including replication, encryption, deduplication, and compression.
C. Provides direct access to VDP configuration integrated into the vSphere Client.
D. Reduces disk space consumed by virtual machine data using deduplication.
【单选题】
An administrator enables vSphere High Availability (HA) on an existing cluster with a large number of hosts and virtual machines. The administrator notices that the setup of vSphere HA on some of the hosts is failing. What step, if taken, might resolve this issue?___
A. Increase the value of the config.vpxd.das.electionWaitTimeSec setting.
B. Set the value of vpxd.das.aamMemoryLimit to 256.
C. Set the value of the das.useDefaultIsolationAddress setting to False.
D. Increase the value of the das.iostatsinterval setting.
【单选题】
An ESXi 6.x host consists of 24 logical cores. Hyperthreading is enabled on the host. What is the maximum number of vCPUs that can be assigned to a virtual machine on this host?___
A. 24
B. 48
C. 64
D. 128
【单选题】
By default, each ESXi 6.x host is provisioned with a certificate from which root certificate authority?___
A. RedHat Certificate Authority
B. VMware Certificate Authority
C. DigiCert Certificate Authority
D. Verisign Certificate Authority
【单选题】
An administrator is adding an NFS datastore as shown in the Exhibit. What is the purpose of the Servers to be added list?___
A. It contains the IP addresses of the NFS Storage Server to provide multipathing capability.
B. It contains the IP addresses of the ESXi hosts that mount the datastore.
C. It contains the IP addresses used for
D. ynamic Discovery of targets.
【单选题】
An administrator reports that the System Event log data is only available for 24 hours when reviewing the Hardware Status tab. Which condition could be responsible for the loss of data?___
A. A Reset event log was executed.
B. The statistical collection level was set to a value of 1.
C. The boot disk of the host is corrupt.
D. Syslog has been configured at the vCenter Server level.
【单选题】
During an upgrade, the ESXi 6.x installer finds an existing version of ESXi and a VMFS3 volume. No virtual machines exist on the host or VMFS3 volume. The requirement is to upgrade to VMFS5. Which option should be chosen to meet this requirement?___
A. Upgrade ESXi and preserve the VMFS datastore
B. Install ESXi and preserve the VMFS datastore
C. Install ESXi and overwrite the VMFS datastore
D. Upgrade
E. SXi and overwrite the VMFS datastore
【单选题】
A vSphere 6.x Standard Switch is configured with 4 virtual machine portgroups, as shown in the exhibit. Which portgroup would be utilized by default when creating a new virtual machine?___
A. Access Network
B. DMZ Network
C. VM Network
D. Virtual Machine Network