【单选题】
(71021)在仅有一负载电阻为R=484 的闭合回路中,已知电压U=220 V,这时负载消耗的功率值是( )。(1.0分)___
A. 20 W
B. 40 W
C. 80 W
D. 100 W
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答案
D
解析
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【单选题】
(71022)临修客车处理故障的时间原则上不得超过( )(1.0分)___
A. 12 h
B. 24 h
C. 36 h
D. 48 h
【单选题】
(71023)所谓等效电源定理,就外部电能来说,总可以由一个等效电动势E和等效内阻R相( )的简单电路来代替。(1.0分)___
A. 串联
B. 并联
C. 混联
D. 串并联
【单选题】
(71024)在职业交往活动中,符合仪表端庄具体要求的是( )。(1.0分)___
A. 着装华贵
B. 适当化妆或戴饰品
C. 饰品俏丽
D. 发型要突出个性
【单选题】
(71025)当车速不小于( )时(信号由车辆提供),塞拉门车门将自动关闭,且没有防挤压功能。(1.0分)___
A. 1 km/h
B. 2 km/h
C. 5 km/h
D. 10 km/h
【单选题】
(71026)第10版《铁路技术管理规程》(铁道部令第29号)自( )起施行。(1.0分)___
A. 2006年10月1日
B. 2007年1月1日
C. 2007年4月1日
D. 2006年10月25日
【单选题】
(71027)有一继电器,其工作电压为6 V,线圈电阻R2=200 ,电源电压为24 V,只要串联的降压电阻R1为( )时,可使继电器正常工作。(1.0分)___
A. 200
B. 400
C. 600
D. 800
【单选题】
(71028)BSP客车便器控制单元有一个小控制板,上有4个红色LED,由上至下依次表示( )是否正常。(1.0分)___
A. 最大水位、最低水位、压力、电源
B. 最大水位、最低水位、电源、压力
C. 电源、压力、最大水位、最低水位
D. 电源、压力、最低水位、最大水位
【单选题】
(71029)列车机车与第一辆车电气连接线的连接与摘解由客列检作业人员负责,无客列检作业人员时,由( )负责。(1.0分)___
A. 列检人员
B. 机车乘务员
C. 车辆乘务员
D. 车站人员
【单选题】
(71030)磁铁的两端磁性( )。(1.0分)___
A. 最强
B. 最弱
C. 不强也不弱
D. 忽强忽弱
【单选题】
(71031)密接式车钩的客车回送时,原则上应附挂旅客列车回送,附挂货物列车回送时,应挂于( ),但不得超过2辆。(1.0分)___
A. 头部
B. 尾部
C. 中部
D. 任何部位
【单选题】
(71032)磁力线线条稀疏处表示磁场( )。(1.0分)___
A. 强
B. 弱
C. 不强也不弱
D. 忽强忽弱
【单选题】
(71033)TFX1防滑器检测速度传感器正、负两端直流电阻值须在( )之间,正、负端与屏蔽层间无短路。(1.0分)___
A. 100~200
B. 300~500
C. 1 000~2 000
D. 500~700
【单选题】
(71034)旅客站台分为低站台、高站台,低站台高度为300 mm,500 mm,高站台高度为( )。(1.0分)___
A. 600 mm
B. 800 mm
C. 1100 mm
D. 1250 mm
【单选题】
(71035)客车电气综合控制柜PLC控制的直流漏电保护值出厂时预设为( )。(1.0分)___
A. 100 mA
B. 150 mA
C. 80 mA
D. 50 mA
【单选题】
(71036)通电线圈周围产生感应磁场的强弱与线圈电流和线圈匝数的乘积( )。(1.0分)___
A. 成正比
B. 成反比
C. 不成比例
D. 不能确定
【单选题】
(71037)列车在区间被迫停车后,对于邻线上妨碍行车地点,应按下列规定放置响墩防护:从两方面( )处防护,如确知列车开来方向时,仅对来车方面防护。(1.0分)___
A. 不少于300 m
B. 不少于800 m
C. 不少于1000 m
D. 按线路最大速度等级规定的列车紧急制动距离位置
【单选题】
(71038)SWKP AS 20C型防滑器进行压力开关试验,当压力小于( )时,压力开关关断。(1.0分)___
A. 210 kPa
B. 187 kPa
C. 160 kPa
D. 130 kPa
【单选题】
(71039)对于正弦交流电来说,最大值等于有效值的( )。(1.0分)___
A. 1/2
B. 2倍
C. 倍
D. 3倍
【单选题】
(71040)铁路运输企业应严格控制进入铁路的产品质量,建立必要的( )。(1.0分)___
A. 监督制度
B. 抽验制度
C. 检验制度
D. 审查制度
【单选题】
(71041)104型集成电空制动机各电磁阀线圈引线的接线应正确,面对接线端子,从左至右的顺号为3,1,2,4,5,此编号相应接于1号的为( )。(1.0分)___
A. 保压电磁阀(+)
B. 制动电磁阀(+)
C. 缓解电磁阀(+)
D. 上述3个电磁阀的(—)
【单选题】
(71042)《铁路客车运用维修规程》(铁运〔2006〕27号)自( )起施行。(1.0分)___
A. 2006年4月1日
B. 2006年5月1日
C. 2006年6月1日
D. 2006年7月1日
【单选题】
(71043)通电直导线周围磁场的方向,通常采用( )进行判定。(1.0分)___
A. 左手螺旋定则
B. 右手螺旋定则
C. 顺时针定则
D. 逆时针定则
【单选题】
(71044)25T客车逆变器箱主电路为三相桥式电压型电路,采用( )作为开关器件,具有开关频率高、驱动简单、损耗低的特点。(1.0分)___
A. IGBT
B. 二极管
C. 三极管
D. 晶闸管
【单选题】
(71045)客货共线运行速度160 km/h<v≤200 km/h铁路,区间双线线间最小距离为( )。(1.0分)___
A. 4 000 mm
B. 4 200 mm
C. 4 400 mm
D. 4 600 mm
【单选题】
(71046)正常情况下,逆变器、充电器带电电路对地绝缘电阻须大于( )。(1.0分)___
A. 5 M
B. 10 M
C. 20 M
D. 15 M
【单选题】
(71047)25T客车逆变器输入欠压保护:当输入电源电压降到( )时,逆变器停止工作。(1.0分)___
A. DC 500 V
B. DC 580 V
C. DC 560 V
D. DC 590 V
【单选题】
(71048)磁场、电流和电磁力三者间的关系可用( )来判定。(1.0分)___
A. 左手定则
B. 右手定则
C. 顺时针定则
D. 逆时针定则
【单选题】
(71049)铁路行车安全监测设备是保障铁路运输安全的重要技术设备,应具备监测、记录、报警、存取功能,保持其作用良好、准确可靠,并定期进行( )。(1.0分)___
A. 维修
B. 计量校准
C. 检查
D. 更换
【单选题】
(71050)对于两根平行电线来说,电流越大导线越长,距离越近则( )就越大。(1.0分)___
A. 磁感应强度
B. 磁场强度
C. 磁电势
D. 电磁力
【单选题】
(71051)25T客车空调逆变电源连续运行试验:车辆加全载,逆变器工作1 h,逆变器工作状态须正常,功率器件的散热表面温升不大于( )。(1.0分)___
A. 50 K
B. 40 K
C. 60 K
D. 70 K
【单选题】
(71052)列车调度电话系统准许( )根据需要在区间临时加入通话。(1.0分)___
A. 列检值班员
B. 代值乘运转车长的车辆乘务员
C. 车辆乘务员
D. 其他人员
【单选题】
(71053)BSP青藏车KC20DQ连接器的额定电流是( )。(1.0分)___
A. 670 A
B. 130 A
C. 250 A
D. 400 A
【单选题】
(71054)通过线圈中电磁感应现象可知,线圈中磁通变化越快,感应电动势( )。(1.0分)___
A. 越小
B. 不变
C. 越大
D. 不能确定
【单选题】
(71055)在干线及繁忙干线上,须设配智能跟踪装置的红外线轴温探测网,轴温探测站的间距一般按( )设置。(1.0分)___
A. 20 km
B. 30 km
C. 40 km
D. 50 km
【单选题】
(71056)25T型客车A1级修程即( )。(1.0分)___
A. 安全检修
B. 40万km段修
C. 80万km段修
D. 大修
【单选题】
(71057)多股铝导线的焊接,可采用( )(1.0分)___
A. 钎焊
B. 气焊
C. 电弧焊
D. 埋弧焊
【单选题】
(71058)救援列车、救援列车人员的出动均由铁路局调度所机车调度员发布事故救援出动的调度命令,列车调度员组织并确保救援列车在( )内开行。(1.0分)___
A. 15 min
B. 20 min
C. 25 min
D. 30 min
【单选题】
(71059)25G型空调客车空调机组主电路由( )供电。(1.0分)___
A. 三相交流380 V
B. 单相交流220 V
C. 直流110 V
D. 直流48 V
【单选题】
(71060)电工有硅钢片分为热轧和冷轧两种,硅钢片的主要特性是( )(1.0分)___
A. 磁导率高
B. 磁导率低
C. 电阻大
D. 电阻小
【单选题】
(71061)最高运行速度超过120 km/h客车的轮对装车前,应进行( )。(1.0分)___
A. 动平衡试验
B. 跑合试验
C. 外观检查
D. 制动盘制动试验
推荐试题
【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
【多选题】
Which three types of Content Libraries exist within vSphere 6.5? (Choose three.)___
A. Remote Content Library
B. Published Content Library
C. Local Content Library
D. Shared Content Library
E. Subscribed Content Library
【多选题】
An administrator cannot enable multi-processor Fault Tolerance (SMP-FT) for a virtual machine. Which are two possible causes for this? (Choose two.)___
A. The virtual machine is running on a vSAN datastore.
B. The Fault Tolerance network is using a 10Gbit uplink.
C. The virtual machine has 6 vCPUs assigned.
D. The virtual machine has a 1TB VMDK attached.
E. The virtual machine has snapshots present.
【多选题】
Which two statements are true for Predictive DRS? (Choose two.)___
A. It balances resource utilization for virtual machines with unpredictable utilization patterns.
B. It integrates DRS with vRealize Operations Manager to balance workloads for virtual machines before resource utilization spikes occur.
C. It balances resource utilization based on a threshold's algorithm that runs each night.
D. It determines the best placement and balance of virtual machines based on a threshold's algorithm that runs each night in vCenter Server 6.5 Database.
【多选题】
Which two situations could cause a virtual machine to appear with (orphaned) appended to its name? (Choose two.)___
A. if a host failover is unsuccessful
B. if a virtual machine was removed from vCenter Server's inventory
C. if a virtual machine was deployed from template, and the template has been deleted
D. if a virtual machine is unregistered directly on the host
【多选题】
Which three requirements are needed to apply RAID 5 or RAID 6 erasure coding on a vSAN 6.2 or 6.5 object? (Choose three.)___
A. on Disk Format 3.0
B. Hybrid vSAN
C. All Flash vSAN
D. vSAN Advanced License
E. Stretched Cluster Configurations
【多选题】
An administrator sees the following error in the log files: Which two events could be the source of the error message? (Choose two.)___
A. vCenter Server failure
B. VXLAN failure
C. Disk array failure
D. Network failure
E. ESXi host failure
【多选题】
An administrator is attempting to access an ESXi host via the DCUI but is unable to do so. Which could be two possible causes? (Choose two.)___
A. The host in Qhas no out-of-band management capability (i.e. iLO/iDRAC).
B. The SSH service is disabled on the host.
C. Strict lockdown mode is enabled on the host.
D. Normal lockdown mode is enabled and the administrator is a member of the
E. xception User list.
【多选题】
Which two permissions are required to migrate a virtual machine with Storage vMotion? (Choose two.)___
A. Network > Move Network
B. Virtual Machine > Inventory > Move
C. Resource > Migrate powered on virtual machine
D. Datastore > Allocate Space
【多选题】
Which are three supported storage requirements for vCenter Server HA? (Choose three.)___
A. NFS
B. RDM
C. vSAN
D. VMFS
E. JBOD
【多选题】
Which are the two network requirements for a VMware vSAN 6.5 cluster? (Choose two.)___
A. Multicast must be enabled on the physical switches and routers that handle vSAN traffic.
B. vSAN requires IPv6 only.
C. All hosts must have a dedicated 40GbE NIC.
D. The vSAN network supported IPv4 or IPv6.
E. vSAN requires IPv4 only.
【多选题】
Which three prerequisites must be in place prior to enabling secure boot for a virtual machine? (Choose three.)___
A. VirtualMachine.Config.Settings privileges
B. an encrypted USB drive
C. Virtual Hardware version 13 or later
D. Virtual Hardware version 12 or later
E. EFI firmware