相关试题
【单选题】
受电端至室内分线盘有开路故障，如果受电端电压已送到通向室内的电缆芯线，但是室内分线盘处测不到电压，则可判断为___故障。
A. 送电端保险丝断开
B. 电缆线路短路或混线
C. 电缆线路断路
D. 防雷元件短路
【单选题】
列控车载设备“车载安全计算机”的英文缩写是___。
A. VC
B. STM
C. BTM
D. DRV
【单选题】
ZDJ9 表示电路中元件 R1 的作用主要是防止室外负载短路时保护___不被损坏。
【单选题】
道岔启动电路中1DQJ的1-2线圈串入道岔动作电路的作用有___。
【单选题】
在城市轨道交通网络中,同种制式的线路实现列车过轨运行,一般通过线与线之间的___ 来实现。
A. 正线
B. 联络线
C. 存车线
D. 车场线
【单选题】
___时，进路上轨道区段的解锁顺序是从始终至终端方向逐段解锁。
A. 取消进路
B. 人工解锁
C. 正常解锁
D. 故障解锁
【单选题】
提速道岔断相保护器DBQX输出电压为直流___。
A. 16V～24V
B. 17.5V～28V
C. 24V～28V
D. 28V～32V
【单选题】
ZD6 转辙机齿条块上的削尖齿和___上的圆弧构成内部锁闭。
A. 表示杆
B. 动作杆
C. 锁闭齿轮
D. 减速器
【单选题】
数据通信系统采用___算法保障数据安全性。
A. 公开
B. 加密
C. 叠加
D. IP 协议
【单选题】
发车指示器显示时间的主要作用是供___使用。
A. 调度
B. 维修人员
C. 司机
D. 站务员
【单选题】
两个以上电台使用同一频率而产生的干扰是___。
A. 邻道干扰
B. 同频干扰
C. 阻塞干扰
D. 杂散干扰
【单选题】
在正线和车辆段之间有一段___作为接口， 以安排列车进入/退出运营。
A. 转换轨
B. 防护区段
C. 存车线
D. 渡线
【单选题】
光缆弯曲半径不得小于光缆外径的___倍。
A. 5 倍
B. 10 倍
C. 15 倍
D. 20 倍
【单选题】
联锁图表不包括___内容。
A. 接近区段
B. 始端信号机显示
C. 敌对进路栏
D. 设备防雷
【单选题】
组合架零层配线中，每个组合架零层能安放___端子板。
A. 11块
B. 12块
C. 13块
D. 14块
【单选题】
下列不属于故障-安全的方法是___。
A. 安全对应法
B. 双断保护法
C. 独立电源法
D. 提高电源电压法
【单选题】
列车安全间隔距离信息是根据最大允许车速、___、线路等信息计算出的。
A. 停车位置
B. 前车距离
C. 列车性能
D. 设备状态
【单选题】
只有___的按钮才能兼作相反方向的调车进路的变通按钮。
A. 单置调车信号机
B. 并置调车信号机
C. 差置调车信号机
D. 通过信号机
【单选题】
进路的锁闭按时机分为进路锁闭和___。
A. 立即锁闭
B. 正常锁闭
C. 延时锁闭
D. 接近锁闭
【单选题】
锁闭的进路在其防护信号机关闭后，能随着列车的正常运行，使轨道区段分段___。
A. 自动解锁
B. 人工解锁
C. 人工强制解锁
D. 接近锁闭
【单选题】
各种信号机（调车信号机除外）的直线显示距离不得小于___。
A. 200m
B. 250m
C. 400m
D. 500m
【单选题】
维护检测子系统的显示分历史数据和___两种。
A. 功率
B. 状态数据
C. 实时数据
D. 衰耗
【单选题】
信号 CBTC 无线系统运行在 ISM 频段___。
A. 1.8GHz
B. 2.4GHz
C. 5.8GHz
D. 3.9GHz
【单选题】
传输系统中接口指标测试的测试项目为___。
A. 误码率
B. 丢包率
C. 延时
D. 带宽
【单选题】
进路的性质与方向，由进路的___按钮决定。
A. 始端
B. 终端
C. 始端和终端
D. 道岔按钮
【单选题】
信号机开放后，该进路上有关道岔不能扳动，其敌对信号___。
A. 能开放
B. 有条件开放
C. 不能开放
D. 无车可开放
【单选题】
继电器电源对地电流不得大于___。
A. 0.5mA
B. lmA
C. l.5mA
D. 2mA
【单选题】
当道岔在转换或发生挤岔故障，停电或断线等故障时，必须保证DBJ和FBJ落下，因此必须使用___。
A. 安全型继电器
B. 有极型继电器
C. 电码型继电器
D. 非安全型继电器
【单选题】
ZD6转辙机速动爪与速动片的间隙，在解锁时不小于___。
A. 0.2mm
B. 1.2mm
C. 1.5mm
D. 2mm
【单选题】
ZD6转辙机速动爪与速动片的间隙，在锁闭时为___。
A. 0.3mm～1.7mm
B. 0.5mm～1.7mm
C. 0.3mm～2mm
D. 1mm～3mm
【单选题】
在无任何道岔动作时，电动转辙机电源对地电流不得大于___。
A. 0.5mA
B. 1mA
C. 1.5mA
D. 2mA
【单选题】
ZD9型电动转辙机电源电压为直流___。
A. 160V
B. 180V
C. 200V
D. 220V
【单选题】
ZD9转辙机自动开闭器的动接点在静接点片内的接触深度不小于___。
A. 1mm
B. 2mm
C. 3mm
D. 4mm
【单选题】
___为半波整流型继电器。
A. JZXC-0.14
B. JZXC-480
C. JZXC-H18
D. JZXC-20000
【单选题】
偏极继电器加反向___电压时，衔铁不应吸起，以保证其工作的可靠性。
A. 100V
B. 200V
C. 220V
D. 300V
【单选题】
JWXC-H340型继电器的额定值为直流___。
A. 12V
B. 24V
C. 50V
D. 220V
【单选题】
有两轨道电路区段：1Ω电阻使其中一个区段轨道继电器落下的轨道电路比0.1Ω电阻使轨道另一区段轨道继电器落下的轨道电路灵敏度___。
【单选题】
轨道电路区段无车占用，轨道继电器落下(开路式)或吸起(闭路式)，轨道电路这种状态就是___状态。
【单选题】
能够使轨道继电器释放的___值称为该轨道电路的分路灵敏度。
A. 最小分路电阻
B. 最大分路电阻
C. 最小分路电流
D. 最大分路电流
【单选题】
ZD6 系列电动转辙机移位接触器主要由开关盒、接点弹片、开关座、___、顶销等部件组成。
A. 顶销螺丝
B. 接点弹簧
C. 接点座
D. 触头
推荐试题
【单选题】
An administrator is troubleshooting network communications between a vCenter Server and an ESXi 6.5 host. Which log shows the related events between these components?___
A. /var/log/fdm.log
B. /var/log/vpxa.log
C. /var/log/hostd.log
D. /var/log/auth.log
【单选题】
An administrator has recently upgraded from vSphere 6.0 to 6.5, and can no longer see the software iSCSI named vmhba33. Which could be the reason for this?___
A. The upgrade has changed the vmhba name.
B. vSphere 6.5 automates iSCSI configurations.
C. vSphere 6.5 no longer supports software iSCSI.
D. The upgrade has deleted the vmhba.
【单选题】
An administrator is trying to vMotion a VM from his datacenter to a recovery site. Which is the maximum allowed RTT (Round-Trip Time) latency between source and destination host?___
A. 100 milliseconds
B. 150 milliseconds
C. 15 milliseconds
D. 10 milliseconds
【单选题】
Which is required for configuring iSCSI Software Adapter network port binding?___
A. VMkernel of the iSCSI traffic must be load balanced using Route based on IP Hash algorithm.
B. VMkernel of the iSCSI traffic must be load balanced using Route based on Source Virtual Port ID algorithm.
C. VMkernel of the iSCSI traffic must be load balanced using Route based on Source MAC Hash algorithm.
D. VMkernel of the iSCSI traffic must be bound to only one active network adapter.
【单选题】
In vSphere Data Protection 6.1, which is the function of a Backup Verification job?___
A. None. Backup Verification job is not a feature of vSphere Data Protection
B. It is a manual task -Power it on -Verify the guest OS -Check started applications
C. It is an automatic process -Restore a virtual machine -Power it on -Verify that the guest OS is booted by communicating with the Backup Verification agent
D. It is an automatic process -Restore a virtual machine -Power it on -Verify that the guest OC is booted by detecting the VMware ToolsTM "heartbeats"
【单选题】
An administrator has enabled vSphere Distributed Switch Health Check. The hosts connected to that Distributed Switch all display an alert:< vSphere Distributed Switch MTU supported status > .The administrator has all of the VMkernel ports MTU sizes set to 1600. Which action will remedy this problem?___
A. Configure the Distributed Switch to MTU 9100.
B. Disconnect and reconnect the physical network cable.
C. Configure the physical switch to MTU 1600.
D. Disable the Distributed Switch MTU.
【单选题】
Which Host Profile Subprofile configuration is used to configure firewall settings for ESXi hosts?___
A. Advanced Configuration Settings
B. General System Settings
C. Security
D. Networking
【单选题】
Where would a vSphere administrator find general vCenter Server logs on a vCenter Server Appliance?___
A. /var/log/vmware/vpxd/
B. /var/log/messages
C. /etc/vmware-vpx/
D. /var/log/vmware/vsan-health/
【单选题】
An administrator wishes to enable network port mirroring based on source port. Which feature should be enabled?___
A. vSphere standard switch port
B. ERSPAN
C. NSX Virtual Wire
D. VLAN
【单选题】
Which CLI command shows the physical uplink status for a vmnic?___
A. esxcli network ip connection list
B. esxcli network ip neighbor list
C. esxcli network nic get
D. esxcli network nic list
【单选题】
Which is the maximum number of block devices (LUNs) that are supported by ESXi hosts that are running version 6.5?___
A. 1024
B. 512
C. 2048
D. 256
【单选题】
When performing a vCenter Server 5.5 for Windows with Microsoft SQL Server Express database migration to vCenter Server Appliance 6.5, which will be the target database?___
A. Microsoft SQL Server Express 2012R2
B. Microsoft SQL Server Standard 2012R2
C. PostgreSQL
D. Oracle DB 11g
【单选题】
An administrator has multiple vCenter Server 6.5 systems but cannot enable Storage I/O Control (SIOC) on a datastore shared by ESXi hosts managed by the vCenter Server systems. Which action should the administrator take to resolve the issue?___
A. Unmount the datastore and then enable SIOC on the vCenter Server system.
B. Configure the datastore to be managed by a single vCenter Server system.
C. Configure Storage DRS and then enable SIOC on the vCenter Server system.
D. Enable Raw Device Mapping (RDM) on the
E. SXi hosts.
【单选题】
“OneAppServer” is a VM template stored in a content library named “LibraryOne”, but the vSphere administrator is not able to use this template for deployment. Why is the administrator unable to deploy OneAppServer?___
A. OneAppServer must be updated before it can be deployed.
B. LibraryOne is a subscribed library and OneAppServer is not downloaded yet.
C. LibraryOne is published and optimized for syncing over HTTP.
D. OneAppServer was imported from a local file on the system.
【单选题】
An administrator sets the Failover Capacity for both CPU and Memory at 25%. Based on the Exhibit below, how much of the cluster’s total CPU resources are still available to power on additional virtual machines?___
A. 45%
B. 25%
C. 70%
D. 60%
【单选题】
Which statement applies to the vSphere Replication appliance?___
A. Only one vSphere Replication appliance can be deployed per vCenter Server instance.
B. VMware Tools in the vSphere Replication appliance can be upgraded.
C. A single vSphere Replication appliance can manage a maximum of 4000 replications.
D. vSphere Replication is available only with the vSphere
E. ssentials Plus license.
【单选题】
Which esxcli namespace can a vSphere Administrator use to adjust the queue depth?___
A. esxcli system module parameters
B. esxcli storage core device
C. esxcli system module set
D. esxcli storage core adapter
【单选题】
Which statement regarding datastore clusters meets VMware’s recommended best practices?___
A. Clusters should contain only datastores presented from the same storage array.
B. Clusters should contain only datastores with equal hardware acceleration capability.
C. Clusters should contain only datastores with the same capacity.
D. Clusters should contain only datastores using the same connection method (iSCSI, FC, etc.).
【单选题】
What VM Monitoring setting would ensure that the maximum reset window for a virtual machine is 24 hours?___
A. Medium
B. Low
C. High
D. Normal
【单选题】
What is the default space threshold for vSphere Storage DRS?___
A. 80%
B. 70%
C. 90%
D. 95%
【单选题】
Which is the correct sequence to upgrade a vSphere infrastructure?___
A. vCenter Server>ESXi host> VMware Tools>VM compatibility
B. ESXi host>vCenter Server> VMware Tools>VM compatibility
C. vCenter host> ESXi host> VM compatibility> VMware Tools
D. ESXi host>vCenter Server> VM compatibility>VMware Tools
【单选题】
An administrator has a large boot from SAN cluster and wants to ensure consistent configuration by using host profiles. What special considerations are required for boot from SAN hosts?___
A. Change the “Device is shared clusterwide” setting to “false” in the host profile.
B. Verify that the boot LUN is correctly identified as the boot device in the host profile.
C. The boot from SAN device must report as a local device.
D. Host profiles are incompatible with boot from SAN hosts.
【单选题】
When using VMware Converter to import a Windows server and improve the consistency of the destination virtual machine, which optional step can be performed immediately prior to powering down the source server?___
A. Perform a final synchronization task.
B. Remove the server from the network.
C. Uninstall production applications.
D. Remove the server from the Active Directory domain.
【单选题】
Restoration of the vCenter Server Appliance is accomplished using which interface?___
A. vSphere Web Client
B. vSphere Client
C. vCenter Server Appliance Management Interface
D. vCenter Server Appliance GUI Installer
【单选题】
When attempting to migrate a virtual machine to another host in the same cluster, the error message, “Select a valid compute resource” returns. What could cause this error?___
A. Both hosts run different versions of ESXi.
B. Both hosts are not sharing the same datastore.
C. VMware Tools is not installed.
D. Virtual machine has an ISO attached.
【单选题】
When will vSphere Data Protection delete the expired backup image of a Platform Service Controller?___
A. Immediately after the retention period has expired.
B. After the expired backup image is restored.
C. During the next backup window following expiry.
D. During the next maintenance window following expiry.
【单选题】
Group A has permission to download files in Content Library. Group B does not have permission to download files in Content Library. If a user is a member of both groups, what will be the result?___
A. The user cannot download file from Content Library.
B. The user can download file from Content Library.
C. The user cannot access Content Library.
D. The user can access Content Library.
【单选题】
An administrator is trying to set up Host Partial Failure Response, but the Automated option is grayed out. What can the administrator change to enable the Automated option?___
A. Change the vSphere DRS Automation level to Partially Automated.
B. Change the vSphere DRS Automation level to Fully Automated.
C. Enable vSphere HA Host Monitoring.
D. Change the vSphere DPM Automation level to Automatic.
【单选题】
When you attempt to open a virtual machine console from the vSphere Web Client, the console does not connect. The following error message appears:<HTTP ERROR 404> <Problem accessin/.Reason: Not Found>. Why did not connect?___
A. Port 443 is in use.
B. Port 9443 is in use.
C. Port 8443 is in use.
D. Port 22443 is in use.
【单选题】
What new feature was introduced to the Content Library in vSphere 6.5?___
A. Mount an ISO directly from the Content Library.
B. Deploy a virtual machine from an OVF Package in a Content Library.
C. Upload a File from a URL to a Library Item.
D. Upload a File from a Local System to a Library Item.
【单选题】
How can an administrator exclude Encryption rights from a support engineer?___
A. Clone the role Virtual machine power user, remove Cryptographic operations privileges.
B. Clone the role Administrator and assign to the support engineer.
C. Clone the role Virtual machine power user and assign to the support engineer.
D. Clone the role No cryptography administrator and select privileges only for the support engineer.
【单选题】
The administrator must back up a vCenter HA deployment. Which component must be backed up?___
A. Passive node
B. Witness node
C. External database
D. Active node
【单选题】
What is the supported protocol to perform remote L3 traffic monitoring in vSphere 6.5?___
A. VXLAN
B. ERSPAN
C. RSPAN
D. SPAN
【单选题】
What are the minimum hardware requirements for a Windows vCenter Server with embedded PSC that manages a “Small” environment?___
A. 2vCPUs, 16 GB RAM
B. 4 vCPUs, 16 GB RAM
C. 2 vCPUs, 10 GB RAM
D. 4 vCPUs, 10 GB RAM
【单选题】
Which port is used for communication between ESXi and vSphere Data protection?___
A. 80
B. 443
C. 902
D. 22
【单选题】
What can prevent Storage DRS from functioning on a datastore?___
A. The datastore is configured for Virtual Machine Swapfile location.
B. The datastore is shared across multiple datacenters.
C. The datastore is connected to a host that is running Storage I/O Control.
D. Storage DRS advanced option IgnoreAffinityRulesForMaintenance is set to 1.
【单选题】
When troubleshooting VMware vCenter Server issues, when logging level provides maximum detail?___
A. Verbose
B. Trivia
C. Info
D. Error
【单选题】
What new feature is introduced in NFS 4.1 on ESXi 6.5?___
A. IPv6
B. KRB5i
C. AUTH_SYS
D. Storage DRS
【单选题】
What configuration option would ensure that a virtual NUMA topology is defined on VMs having more than eight virtual CPUs?___
A. cupid.coresPerSocket
B. numa.vcpu.followcorespersocket
C. numa.vcpu.maxPerVirtualNode
D. numa.vcpu.min
【单选题】
What is the minimum disk space required to deploy vSphere Data Protection (VDP) with 8 TB configuration?___
A. 4 TB
B. 16 TB
C. 8 TB
D. 12 TB
