相关试题
【单选题】
地铁列车车体按使用的材质一般可分为___。
A. 铝合金车体、耐侯钢车体和不锈钢车体
B. 耐侯钢车体和不锈钢车体
C. 铝合金车体、耐侯钢车体
D. 铝合金车体、不锈钢车体
【单选题】
列车车体按制造工艺又可分为___结构。
A. 焊接、铆接或混合连接
B. 焊接、铆接
C. 焊接或混合连接
D. 铆接或混合连接
【单选题】
司机室通过司机室块隔离墙与客室分开。在司机室的左边安装了___，供紧急情况疏散乘客。
A. 应急逃生门
B. 客室门
C. 设备柜门
D. 信号柜
【单选题】
紧急制动只采用___制动，而且制动命令是不可更改的。
A. 再生制动
B. 电阻制动
C. 空气制动
D. 停放制动
【单选题】
最大网压再生制动时，网压限制在___V。
A. 1900
B. 1800
C. 1600
D. 1500
【单选题】
站台门由滑动门、固定门、应急门、___组合而成。
A. 司机室门
B. 客室门
C. 安全门
D. 端门
【单选题】
辅助逆变器SC通过车顶___或车间电源插座和一条高压母线获得DC1500V电源。
A. 受电弓
B. 空调
C. 车间电源
D. 接触器
【单选题】
当一个蓄电池的___不工作时，相应的电池没有充电电流。
A. 充电器
B. 电阻
C. 电容
D. 二极管
【单选题】
当牵引控制电子装置探测到车轮出现空转时，___将减小，直到空转现象消除。
A. 牵引力
B. 摩擦制动
C. 电阻制动
D. 制动力
【单选题】
主风缸的容量是___L 。
A. 90
B. 100
C. 110
D. 120
【单选题】
主风管压力正常范围___bar。
A. 7.5-8.4
B. 8.4-9.5
C. 9.5-10.3
D. 10.3
【单选题】
主空压机启动压力___bar。
A. 7
B. 8.4
C. 9.5
D. 10.3
【单选题】
主空压机停止压力___bar。
A. 7.5
B. 8.4
C. 9.5
D. 10.3
【单选题】
辅助空压机启动要求压力___bar。
A. 7.5
B. 8.4
C. 9.5
D. 10.3
【单选题】
摩擦制动是将物体的动能转化为热能，从而产生制动作用，通常可以分为闸瓦制动、___、磁轨制动、液力制动。
A. 再生制动
B. 电阻制动
C. 盘形制动
D. 涡流制动
【单选题】
限制向后（RMR）模式车辆限速___km/h。
【单选题】
限制向前（RMF）模式车辆限速___km/h。
【单选题】
低电压由辅助逆变器输出和___提供。
A. 接触网
B. 蓄电池
C. 牵引逆变器
D. 车间电源
【单选题】
轨道电路是以___作导体，两端加以机械绝缘（或电气绝缘），接上送电和受电设备构成的电路。
【单选题】
南京地铁列车上有3种车钩类型：全自动车钩，___，半永久牵引杆。
A. 半自动永久车钩
B. 全自动永久牵引杆
C. 永久牵引杆
D. 半自动车钩
【单选题】
解钩可分为自动解钩和___。
A. 非自动
B. 电气解钩
C. 半自动解钩
D. 手动解钩
【单选题】
当车间电源被使用时，___列车线被激活。
A. 降弓
B. 升弓
C. 受电弓
D. 紧急制动
【单选题】
在唤醒模式时，静态逆变器不工作，蓄电池可以提供___分钟应急通风和应急照明。在此之后，应急通风被切断，并继续供电至少5分钟。
【单选题】
城市轨道交通车辆制动模式通常分为常用制动、___快速制动、紧急制动、停放制动。
A. 能耗制动
B. 反接制动
C. 局部制动
D. 保持制动
【单选题】
400V的中压用于___、空调、牵引设备的通风。
A. 继电器
B. 空压机
C. 控制回路
D. 紧急照明
【单选题】
230V中压用于___、LCD显示屏、司机室脚部加热器和维护插座等。
A. 继电器
B. 正常照明
C. 控制回路
D. 紧急照明
【单选题】
变压器将中压转换为低压，低压用于___、应急照明、旅客紧急通风、通讯、控制和数据处理等。
A. 空压机
B. 车门
C. 正常照明
D. 空调
【单选题】
400V交流供给给车辆上不同的交流负载，它来自于___。
A. 低压
B. 辅助逆变器
C. 静止逆变器
D. 制动电阻
【单选题】
列车可供选择的电压如下：1500V直流供给给___系统，它是通过受电弓来传输接触网的电流。
【单选题】
___V直流供给车辆上的直流负载，它来源于由辅助逆变器充电的蓄电池。
A. 1100
B. 110
C. 1500
D. 400
【单选题】
客室门技术参数：供电电压：___VDC。
A. 180
B. 170
C. 120
D. 110
【单选题】
车顶高压受流系统主要由___、熔断器箱、涌浪吸收器（避雷器）、受电弓控制盒等组成。
A. 羊角
B. 受电弓
C. MVB总线
D. 转向架
【单选题】
模式选择器MS给___列车线。
A. 牵引列车线
B. 制动列车线
C. 选择手动模式时，手动编码列车线得电
D. 向后列车线
【单选题】
车辆空调机组控制电源为：___V。
A. 24
B. 110
C. 230
D. 440
【单选题】
车门有效净高度不应低于___m。
A. 1.8
B. 1.9
C. 2.0
D. 2.2
【单选题】
两列车相撞后自动车钩装置能够吸收___km/h的能量。
【单选题】
滑行是指制动力大于粘着力，发生滑行的轮对转速___其它轮对转速。
A. 大于
B. 等于
C. 小于
D. 小于或等于
【单选题】
停放制动采用的是（）缓解（）施加，而气制动采用的是___缓解（）施加。()
A. 充气充气、排气排气
B. 充气排气、排气排气
C. 充气排气、排气充气
D. 排气充气、充气排气
推荐试题
【单选题】
A vSphere administrator wants to enable a virtual machine with Secure Boot, but in VM setting, Secure Boot option was not found under Boot Options. What could be the cause?___
A. The virtual hardware is not compatible.
B. The virtual machine has missing drivers.
C. The virtual machine OS does not support secure boot.
D. VMware Tools is not upgraded.
【单选题】
A virtual machine is connected on a distributed port group where the average bandwidth configured in the traffic shaping policy is 100 Mbps. The VM network adapter is configured with a reservation of 200 Mbps. What is the VM’s effective bandwidth?___
A. 200 Mbps
B. 100 Mbps
C. 150 Mbps
D. 400 Mbps
【多选题】
What are two reasons why a datastore in a Storage DRS cluster cannot enter maintenance mode?(Choose two.)___
A. Storage latency is too high to allow Storage DRS initiate Storage vMotion.
B. Storage DRS is configured for a VMFS3 datastore.
C. Storage
D. RS is disabled on the virtual disk.
【多选题】
What two methods are used to configure VMware vSphere Storage I/O Control shares and limits? (Choose two.)___
A. Assign shares and limits to VM virtual disks.
B. Assign shares and limits to datastores.
C. Assign shares and limits to Storage (DRS) clusters.
D. Assign shares and limits using VM storage policies.
【多选题】
ESXi 6.5 introduces VMFS6, which supports both 512e and 512n devices. What three configurations are supported when using these devices? (Choose three.) ___
A. Hosts with both 512e and 512n devices.
B. Storage vMotion between both 512e and 512n devices.
C. Datastore Extents spanned between both 512e and 512n devices.
D. Storage DRS clusters containing only both 512e and 512n devices.
【多选题】
A vSphere Administrator observes that the Primary VM configured with Fault Tolerance is executing slowly. After further investigation, it is determined that the Secondary VM is on an overcommitted ESXi host. What two methods will correct the problem? (Choose two.)___
A. Use Storage vMotion to migrate the Secondary VM to another datastore.
B. Use vMotion to migrate the Secondary VM to a different ESXi host.
C. Configure a CPU limit on the Primary VM which will also apply to the Secondary VM.
D. Turn off and turn on FT in order to recreate the Secondary VM on a different datastore.
【多选题】
Which two features require the use of Host Profiles? (Choose two.)___
A. Host Customizations
B. shared storage
C. Auto
D. eploy
【多选题】
What three processes on the vCenter Server Appliance (VCSA) does“vmware-watchdog monitor? (Choose three.) ___
A. vmware-eam
B. vmcad
C. vmware-vpostgres
D. vpxd
E. vsan-health
【多选题】
What three processes on the vCenter Server Appliance (VCSA) does“vmware-watchdog monitor? (Choose three.) ___
A. vmware-eam
B. vmcad
C. vmware-vpostgres
D. vpxd
E. vsan-health
【多选题】
Which two statements correctly describe VM-Host affinity rules? (Choose two.) ___
A. When there is more than one VM-Host affinity rule in a vSphere DRS cluster, the rules are applied equally.
B. After creating a VM-Host affinity rule, its ability to function in relation to other rules is predetermined.
C. When there is more than one VM-Host affinity rule in a vSphere
D. RS cluster, the rules will be ranked.
【多选题】
An administrator wants to enable proactive HA by moving virtual machines automatically if a hardware alert is triggered. What are the three required settings? (Choose three.)___
A. Set vSphere DRS Automation to Partially Automated.
B. Turn on Proactive HA.
C. Set the Proactive HA Automation Level to Manual.
D. Set the Proactive HA Automation Level to Automated.
E. Turn on vSphere HA and vSphere DRS.
【多选题】
If vCenter Server 5.5 installation has one or more services deployed remotely, which three services are relocated to vCenter Server 6.5 on upgrade? (Choose three.)___
A. vCenter Inventory Services
B. vSphere Authentication Proxy
C. vSphere Web Client
D. vSphere
E. SXi Dump Collector
【多选题】
What two debugging levels can a virtual machine be configured to? (Choose two.)___
A. Verbose
B. Debugging
C. Statistics
D. Trivia
【多选题】
What are three benefits of using a few large-capacity LUNs instead of many small-capacity LUNs? (Choose three.) ___
A. Better performance because there is less contention for a single volume.
B. More flexibility for resizing virtual disks.
C. Less wasted storage space.
D. More flexibility to create virtual machines without adding new LUNs.
E. Fewer VMFS datastores to manage.
【多选题】
Which two configurable options are available in Boot Options for a virtual machine? (Choose two.)___
A. Tools Upgrades
B. Encryption
C. Firmware
D. Force BIOS setup
【多选题】
Which three VMware-recommended best practices should an administrator follow before upgrading to vSphere 6.5? (Choose three.)___
A. Disconnect ESXi host from vCenter.
B. VMware Tools are installed in the virtual machine.
C. Ensure that the system hardware complies with ESXi requirements.
D. Back up the host.
E. Check the interoperability of any other software integrated with vSphere.
【多选题】
What are two requirements to enable EVC in vSphere DRS cluster? (Choose two.)___
A. CPUs must be from the same vendor.
B. EVC must use the lowest possible baseline supported by the hardware.
C. CPUs must be in the same family and of the same speed.
D. No VMs may be running in the cluster.
【多选题】
What three conditions could result in VMware Flash Read Cache being unable to claim a disk? (Choose three.)___
A. The disk is not listed in the VMware hardware compatibility guide.
B. The disk is not detected as an SSD.
C. The disk is not detected as local.
D. The disk is in use by VMFs.
【多选题】
Boot from SAN is supported on which three storage technologies? (Choose three.)___
A. VMware vSAN
B. FCoE
C. NFS 4.1
D. iSCSI
E. FC
【多选题】
Which two components are part of storage I/O multipathing on ESXi? (Choose two.)___
A. SATP
B. VASA
C. PSP
D. VAAI
【多选题】
Which two statements are true about Highly Available vSphere Auto Deploy infrastructure? (Choose two.)___
A. It helps prevent data loss.
B. It is a prerequisite for using vSphere Auto Deploy with stateful install.
C. It requires two or more Auto
D. eploy servers.
【多选题】
The virtual machine log rotation size can be changed for all VMs by which two interfaces? (Choose two.)___
A. PowerCLI
B. vSphere Web Client
C. ESXi host client
D. esxcli
【多选题】
Which two configuration options can exclude virtual disks from snapshot operations? (Choose two.)___
A. Use RDM in virtual mode for virtual disk.
B. Use virtual disks in Independent – Persistent mode.
C. Use a virtual disk larger than 2 TB in size.
D. Use RDM in physical mode for virtual disk.
【多选题】
Which two storage configurations on the source server are unsupported with VMware Converter? (Choose two.)___
A. Linux LVM
B. software RAID
C. GPT/MBR hybrid disks
D. Windows basic volumes
E. Windows dynamic volumes
【多选题】
Which two statements about vCenter HA are correct? (Choose two.)___
A. ESXi 5.5 or later is required.
B. vCenter HA network latency between nodes must be less than 50 ms.
C. NFS datastore is supported.
D. It must be deployed on a 3
E. SXi host cluster with DRS enabled.
【多选题】
An attempt to delete NFS datastore from a ESXi host returns the error: Sysinfo error on operation returned the following status:< Busy> Which two statements could explain this failure? (Choose two.)___
A. NFS datastore is a part of Storage DRS Cluster.
B. NFS.VolumeRemountFrequency value is set to 30.
C. Storage I/O Control is enabled on NFS datastore.
D. NFS datastore has running or registered virtual machines.
【多选题】
An administrator finds that the Microsoft Exchange virtual machines are exhibiting network latency. What two in-guest changes can help decrease latency? (Choose two.)___
A. LRO
B. TSO
C. SR-IOV
D. PVRDMA
【多选题】
Which two types of iSCSI adapters require VMkernel networking configuration? (Choose two.)___
A. dependent hardware
B. in-guest
C. software
D. independent hardware
【多选题】
Which two statements are true for NFS v4.1 firewall behavior? (Choose two.)___
A. It closes port 2049.
B. It sets allowed. All flag to TRUE.
C. It sets allowed. All flag to FALSE.
D. It opens port 2049.
【多选题】
A vSphere Administrator attempts to enable Fault Tolerance for a virtual machine but receives the following error: Secondary VM could not be powered on as there are no compatible hosts that can accommodate it. What two options could cause this error? (Choose two.)___
A. The other ESXi host(s) are in Maintenance Mode.
B. Hardware virtualization is not enabled on the other ESXi host(s).
C. The other ESXi host(s) are in Quarantine Mode.
D. Hardware MMU is enabled on the other
E. SXi host(s).
【多选题】
Storage capabilities be populated in what two ways? (Choose two.)___
A. The administrator can use tags to describe capabilities.
B. Default capabilities are provided by vCenter Server.
C. Datastores can advertise their capabilities through VAAI.
D. Datastores can advertise their capabilities through VASA.
【多选题】
In network troubleshooting it is important to know what upstream switch the ESXi host is connected to. Which two features does ESXi provide to help identify the upstream switch? (Choose two.)___
A. Promiscuous mode
B. DPM
C. LLDP
D. CDP
【多选题】
Virtual Volumes supports which three VMware features? (Choose three.)___
A. Instant Clones
B. Distributed Resource Scheduler
C. Linked Clones
D. vMotion
E. Storage Distributed Resource Scheduler
【多选题】
vSphere DRS helps to balance virtual machines with available resources in a vSphere cluster. What three types of resources can be taken into account for balancing? (Choose three.)___
A. CPU
B. physical NIC saturation of an ESXi host
C. virtual NIC saturation of a virtual machine
D. RAM
E. storage latency
【多选题】
Which three design requirements must be satisfied to enable RAID-6 objects in a VMware vSAN cluster? (Choose three.)___
A. vSAN Advanced license or higher
B. vSAN stretched cluster
C. at least six hosts contributing storage
D. deduplication and compression
E. all flash configuration
【多选题】
When using "Cluster resource percentage" for host failover capacity in vSphere HA Admission Control, the total resource requirements are calculated from which two values? (Choose two.)___
A. Total vCPUs assigned to each VM.
B. Average CPU usage on each VM over time.
C. Memory reservations on each VM.
D. Total memory assigned to each VM.
E. Average active memory on each VM over time.
F. CPU reservations on each VM.
【多选题】
Which are four attributes of the Active vCenter HA node? (Choose four)___
A. It uses the vCenter HA network to communicate with the Witness node.
B. It constantly replicates vPostgres data with the Witness node.
C. It uses a public IP address for the management interface.
D. It runs the active vCenter Server Appliance instance.
E. It uses the vCenter HA network for replication of data to the Passive node.
F. It provides a quorum to protect against split-brain situations.
【多选题】
Which are two vCenter Server two-factor authentication methods? (Choose two.)___
A. RSA SecurID
B. Smart Card
C. SAML
D. Symantec VIP
【多选题】
An administrator is creating VMkernel adapters on an ESXi 6.5 host and wants to create separate VMkernel adapters for every type of traffic in the default TCP/IP stack. Which three types of traffic can be explicitly enabled on a separate VMkernel adapter? (Choose three.)___
A. Virtual SAN traffic
B. NFS traffic
C. vMotion traffic
D. vSphere HA traffic
E. Fault Tolerance logging traffic
【多选题】
When migrating a Windows vCenter Server 6.0 to the vCenter Server Appliance 6.5, which two will be migrated by default? (Choose two.)___
A. Local Windows OS users and groups
B. Configuration
C. Custom ports
D. FQDN
E. Historical and Performance data
