【单选题】
HXD3电力机车单机(轴重25t)以120km/h在平直道上施行紧急空气制动时,最大制动距离小于___m。
A. 800
B. 900
C. 1100
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答案
B
解析
暂无解析
相关试题
【单选题】
HXD3电力机车在半径___m的曲线上能进行正常摘挂作业。
A. 150
B. 250
C. 300
【单选题】
HXD3电力机车牵引控制司机控制器手柄为___级,级间能平滑调节。
A. 10
B. 12
C. 13
【单选题】
HXD3电力机车制动控制司机控制器手柄为___级,级间能平滑调节。
A. 10
B. 12
C. 13
【单选题】
HXD3电力机车牵引电动机用冷却风机中的惯性分离过滤器在牵引风机的___使用。
A. 排风侧
B. 进风侧
C. 中部
【单选题】
HXD3电力机车空气压缩机的冷却器是吸收车内的空气,向___直接排气。
A. 车内
B. 车顶
C. 车外(地板下)
【单选题】
HXD3电力机车有___个并联的回流装置 EB1~EB6,从轮对回流至钢轨。
A. 2
B. 4
C. 6
【单选题】
HXD3电力机车高压隔离开关采用电空控制方式进行转换的。当一台受电弓发生故障接地时,可通过控制电器柜上的隔离开关 SA___,将其打至对应隔离位。
A. 95
B. 96
C. 98
【单选题】
HXD3电力机车高压电压互感器次边输出通过保护用的自动开关 QA___,分别送到主变流器UM1和主变流器UM2的控制单元,作为主变流器控制的同步信号使用。
A. 1
B. 2
C. 3
【单选题】
HXD3电力机车低压电流互感器TA___是为电度表的计量提供电流输入,为机车微机控制系统提供原边电流信号,用于原边电流显示。
A. 1
B. 2
C. 3
【单选题】
HXD3电力机车高压接地开关QS10上配有1把蓝色钥匙和___把黄色钥匙。
A. 1
B. 2
C. 3
【单选题】
HXD3电力机车将蓝色钥匙插入接地开关 QS10 并向右旋转至___位,保证车顶设备可靠接地。
A. 运行
B. 中间
C. 接地
【单选题】
HXD3电力机车主变压器的___个1450V牵引绕组分别用于两套主变流器的供电。
A. 2
B. 4
C. 6
【单选题】
HXD3电力机车主变压器___个399V辅助绕组分别用于辅助变流器的供电。
A. 1
B. 2
C. 4
【单选题】
HXD3电力机车每组牵引变流器分别有___个接触器。
A. 1
B. 2
C. 3
【单选题】
HXD3电力机车主接地保护电路由跨接在中间回路的___个串联电容和一个接地信号传感器组成。
A. 两
B. 四
C. 六
【单选题】
HXD3电力机车主变流器含有___套独立的接地保护电路,可以分别对3组牵引变流器进行接地监测和保护。
A. 一
B. 二
C. 三
【单选题】
HXD3电力机车牵引绕组过流故障在3分钟内连续发生___次,故障将被锁定,必须切断 CI 控制电源,才能恢复正常。
A. 两
B. 三
C. 四
【单选题】
HXD3电力机车主电路某一点接地时则形成回路,接地检测回路有故障电流流过,传感器输出电流信号,使保护装置动作,其动作保护值为___A。
A. 5
B. 8
C. 10
【单选题】
HXD3电力机车当原边网压高32kV且持续___ms 或者是高于35kV且持续1ms时,CI 实施保护。
A. 3
B. 5
C. 10
【单选题】
HXD3电力机车当原边网压低于16kV且持续___ms时, CI 实施保护。
A. 3
B. 5
C. 10
【单选题】
HXD3电力机车库内电源通过单相插座送到___位牵引电动机的牵引变流器环节,进行库内动车作业。
A. 一、六
B. 二、五
C. 三、四
【单选题】
HXD3电力机车正常情况下,辅助变流器UA11、UA12基本上以___%的额定容量工作。
A. 40
B. 50
C. 60
【单选题】
HXD3电力机车当某一套辅助变流器发生故障时,允许___压缩机可以投入工作。
A. 两台
B. 操纵端
C. 非操纵端
【单选题】
HXD3电力机车辅助变流器的过流和过载保护故障消除后___s内自动复位。
A. 3
B. 5
C. 10
【单选题】
HXD3电力机车辅助变流器输入回路中的过流和过载保护故障在___分钟内连续发生两次,该辅助变流器将被锁死。
A. 2
B. 3
C. 5
【单选题】
HXD3电力机车辅助电动机回路过载保护动作故障在2分钟内连续发生___次,该辅助变流器将被锁死。
A. 2
B. 4
C. 6
【单选题】
HXD3电力机车最多可以实施同型号的___台机车重联。
A. 2
B. 4
C. 6
【单选题】
当HXD3电力机车速度大于等于___km/h,且机车未实施空气制动时,可进行“定速控制”操作。
A. 10
B. 15
C. 20
【单选题】
HXD3电力机车进入“定速控制”状态后,实际速度大于“目标速度___km/h”时, TCMS控制机车进入电气制动工况。
A. 1
B. 2
C. 3
【单选题】
HXD3电力机车进入“定速控制”状态后,司机控制器调速手柄的级位变化超过___级以上时,机车“定速控制”状态自动解除。
A. 1
B. 2
C. 3
【单选题】
HXD3电力机车制动缸压力高于___kPa时,踏面清扫投入。
A. 50
B. 100
C. 150
【单选题】
HXD3电力机车制动缸压力低于___kPa 时,踏面清扫解除。
A. 50
B. 30
C. 20
【单选题】
HXD3电力机车为防止损坏辅助压缩机,辅助压缩机打风时间不得超过___分钟。
A. 3
B. 5
C. 10
【单选题】
HXD3电力机车受电弓(自绝缘子底面)升高到2m的升弓时间≤___s。
A. 4.5
B. 5.4
C. 6
【单选题】
HXD3电力机车受电弓从2m高度(至绝缘子底面)落下的降弓时间≤___s。
A. 2
B. 3
C. 4
【单选题】
HXD3电力机车转向架构架上侧2轴以及5轴附近的侧档与车体之间每侧的自由横动量为 ___mm。
A. 10
B. 20
C. 30
【单选题】
HXD3电力机车在网压___kV时功率为零。
A. 17.2
B. 19.5
C. 20.2
【单选题】
HXD3电力机车(25t 轴重)恒功率速度范围在___ km/h~120km/h 。
A. 55
B. 65
C. 70
【单选题】
HXD3电力机车应能以___km/h速度安全通过半径为125m的曲线。
A. 3
B. 5
C. 7
【单选题】
HXD3电力机车整体的车内的增压空气量是___m3/s 。
A. 2.6
B. 1.6
C. 3.6
推荐试题
【单选题】
You have just installed an ESXi 6.x Host. As part of your company security regulations, a security banner must be presented on the console of the host. How can this action be accomplished?___
A. Configure the Advanced Settings > Annotations screen of the ESXi host.
B. This is configured from the Direct Console User Interface configuration menu.
C. It is not possible to configure a security banner for the ESXi host.
D. From vCenter Server, this setting is configured globally in the vCenter Server configuration.
【单选题】
An administrator is only able to see the Health Badge when using the vRealize Operations user interface. What is the likely cause of this behavior?___
A. The vRealize Operations Foundation License is in use.
B. The vmware-sps service failed to start.
C. The vRealize Operations Standard License is in use.
D. The vmware-rbd-watchdog service failed to start.
【单选题】
An administrator has configured an alarm to be notified when a virtual machine meets either of these conditions: <High virtual CPU> <High active memory consumption.> <The alarm is only triggering when both of the conditions are met.> What can be done to correct the alarm behavior?___
A. Edit the alarm and select Trigger if ANY of the following conditions are satisfied.
B. Edit the alarm and select Trigger if ALL of the following conditions are satisfied.
C. Create two separate alarms, one for CPU and one for memory and link them together with ESXCLI.
D. Delete the existing alarm and create a new event based alarm.
【单选题】
An administrator creates an ESXi cluster using vSphere Auto Deploy. The ESXi hosts are configured to get a management IP address from a DHCP server. The administrator needs to troubleshoot the management network on one of the hosts. Which DCUI option should the administrator use to renew the DHCP lease? ___
A. Restart Management Network
B. Restore Network Settings
C. Test Management Network
D. Configure Management Network
【单选题】
An administrator is attempting to restore a number of files in a directory within the Operating System of a virtual machine. How can the administrator restore the files from a previous backup? ___
A. Use the File Level Restore option from the selected backup of the virtual machine in the vSphere Web Client.
B. Connect to the File Level Restore tool from a web browser in the virtual machine.
C. Connect to the File Level Restore tool from the VMware
D. ata Protection appliance.
【单选题】
After selecting an object in vRealize Operations, how can a user compare the badge values of related child objects? ___
A. Use the Scoreboard tab
B. Use the Relationship tab
C. Use the Members tab
D. Use the Overview tab
【单选题】
You want to deploy a vApp and dynamically assign IP addresses without a DHCP server on the network. Which action would you take to accomplish this task? ___
A. Enable IP pools.
B. Configure a local DHCP server in the vApp.
C. Enable NAT on the vApp router.
D. Configure the guest OS for workgroup and WINS.
【单选题】
What is the optimal configuration when building a virtual machine for a single-threaded Windows application? ___
A. Deploy single-threaded applications on uniprocessor virtual machines.
B. Deploy single-threaded applications on symmetric multi-processor virtual machines.
C. Tune single-threaded applications to take advantage of symmetric multi-processor resources.
D. Tune Single-threaded applications at the hypervisor level.
【单选题】
An administrator has created the resource pool configuration shown in the Exhibit. Based on the exhibit, which virtual machine(s) can be successfully powered on? ___
A. VM-M1 only
B. VM-K1 only
C. VM-K1 and VM-K2 only
D. VM-K1, VM-K2, and VM-M1
【单选题】
Which vSphere 6 Enterprise Edition feature will allow an organization to ensure that critical multi-threaded applications have the maximum possible uptime? ___
A. Fault Tolerance
B. High Availability
C. Distributed Resource Scheduler
D. App HA
【单选题】
An administrator has a virtual machine that requires four times the compute resources than other virtual machines on the same ESXi 6.x host. How should the administrator configure the virtual machine settings, in order to be prepared for any resource contention? ___
A. Set the shares of the priority virtual machine to High and the rest to Low.
B. Set the shares of the priority virtual machine to High.
C. Set the shares of the priority virtual machine to High and the rest to Normal.
D. Set the shares of the priority virtual machine to Normal and the rest to Low.
【单选题】
Which type of Adapter does not require vmkernel networking? ___
A. Independent Hardware iSCSI Adapter
B. Dependent Hardware iSCSI Adapter
C. Software iSCSI Adapter
D. Software FCoE Adapter
【单选题】
During the installation of ESXi 6.0, the following error message is reported: Hardware Virtualization is not a feature of the CPU, or is not enabled in the BIOS. Which condition would generate this message? ___
A. LAHF/SAHF is not enabled in the BIOS.
B. NX/XD is not enabled in the BIOS.
C. SSE3 is not enabled in the BIOS.
D. Hyperthreading is not enabled in the BIOS.
【单选题】
An administrator is unable to login to vCenter Server when using the vSphere web client. The administrator successfully accessed vCenter Server using the client earlier the same day. What is the most appropriate first step the administrator should take to resolve this issue? ___
A. Verify the web browser being used has Adobe Flash plugin version 11.5 or later
B. Verify the vCenter Single Sign-On service is running on the vCenter Server
C. Verify the vSphere Web Server service is running on the vCenter Server
D. Verify the administrator has permissions configured in vCenter Server
【单选题】
An administrator has configured an alarm to be notified when a virtual machine meets two conditions: <high virtual CPU> <high active memory consumption> The alarm is malfunctioning and triggering when either condition is met instead of both. What can be done to correct the issue? ___
A. Edit the alarm and select Trigger if ALL of the following conditions are satisfied.
B. Edit the alarm and select Trigger if ANY of the following conditions are satisfied.
C. Create two separate alarms, one for CPU and one for memory.
D. Delete the existing alarm and create a new event based alarm.
【单选题】
What must be enabled to ensure that VM Component Protection (VMCP) works in a High Availability cluster? ___
A. VMware Tools Virtual Machine Communication Interface (VMCI)
B. Fault Tolerance
C. Atomic Test and Set (ATS)
D. All Paths Down (APD) Timeout
【单选题】
An administrator wants to add a web server to an existing multi-tier application consisting of three virtual machines: <A web server> <A database server An application server> The web server should be added to the application when the primary web server reaches: <70% vCPU utilization> <55% active memory> Which option will achieve this result? ___
A. Create a virtual machine alarm with an action to run a script that starts a new instance of the web server.
B. Create a host cpu and memory alarm with an action to run a script that starts a new instance of the webserver.
C. Configure HA application monitoring for the web server and set it to trigger deployment of a new instance of the web server.
D. Configure Fault Tolerance on the virtual machine and leave the secondary machine disabled until needed.
【单选题】
An administrator has an application that requires connection directly to PCI devices through a virtual machine. What is a limitation of this configuration? ___
A. Devices must be reserved for PCI passthrough on at least one host on which the virtual machine will run.
B. Snapshots are not supported with DirectPath I/O passthrough devices.
C. A maximum of 18 PCI vSphere
D. irectPath devices can be added to a virtual machine.
【单选题】
The vSphere administrator is configuring directory services for an ESXi host: What should the vSphere administrator do to configure the host to use CAM services? ___
A. Check the Use vSphere Authentication Proxy checkbox.
B. Set Select Directory Service Type to CAM services.
C. Specify CAM$ for the
D. omain.
【单选题】
Which statement is true regarding the licensing of vCenter Server? ___
A. The license for vCenter Server must be provided at the time of installation.
B. Changing the license assigned to vCenter Server requires a restart of the vCenter Server service.
C. Virtual machines can still be powered on if the vCenter Server license expires.
D. Licensing for a single vCenter Server installation is determined by the number of managed virtual machines.
【单选题】
When configuring vSphere Replication for a virtual machine, what is the lowest Recovery Point Objective (RPO) that can be selected? ___
A. 1 min
B. 5 min
C. 10 min
D. 15min
【单选题】
A developer needs to create a multi-tier development stack for a home lab. Which vSphere product will support the architecture required for the least software cost? ___
A. vSphere Hypervisor
B. vSphere Essentials
C. VMware Player
D. VMware Workstation
【单选题】
An administrator is installing Windows into a virtual machine. The DVD has been mounted on the Host and configured for the virtual machine as shown in the Exhibit. Based on the exhibit, when the virtual machine is booted, why would it attempt to search for a PXE server? ___
A. The CD/DVD device is not connected.
B. The ISO is in the incorrect storage location.
C. The OS minimum requirements have not been met.
D. The CD/DVD device is not set to Client Device.
【单选题】
What component must be installed prior to deploying a vCenter Server in vSphere 6.x? ___
A. vCenter Identity Services
B. Platform Services Controller
C. vCenter Single Sign-On
D. Client Integration Plug-In
【单选题】
What is a valid plug-in status for a plug-in that has been added to a vSphere client? ___
A. Disabled
B. Unknown
C. Stopped
D. Installed
【单选题】
Users of an application are reporting performance issues. The following performance values are observed in the vSphere Web Client: <Host CPU utilization is 90%> <Virtual Machine memory utilization is consistently greater than 90% CPU Ready values are higher than 20%> What could be the cause of the application performance issue? ___
A. The host is lacking the CPU resources required to meet the demand.
B. The host is lacking the memory resources required to meet the demand.
C. The virtual machine is lacking the CPU resources required to meet the demand.
D. The virtual machine is lacking the memory resources required to meet the demand.
【单选题】
An administrator creates an ESXi cluster using vSphere Auto Deploy. The ESXi hosts are configured to get a management IP address from a DHCP server. The administrator needs to troubleshoot the management network on one of the hosts. Which DCUI option should the administrator use to renew the DHCP lease? ___
A. Restart Management Network
B. Restore Network Settings
C. Test Management Network
D. Configure Management Network
【单选题】
An administrator is re-provisioning an ESXi host and moving it to another datacenter. Which DCUI option should the administrator use to revert the system configuration to the default settings? ___
A. Reset System Configuration
B. Rebuild Default System Configuration
C. Revert System Configuration
D. Renew Default System Configuration
【单选题】
An administrator has just completed installing an ESXi 6.x host, but doesn't know what address has been configured. Where is the ESXi host IP address configured? ___
A. RVC console
B. Direct Console User Interface
C. vSphere Web Client
D. vSphere Client
【单选题】
When is it possible to place a VMFS5 datastore in maintenance mode? ___
A. When it is a member of a Storage DRS cluster
B. When it is a member of Virtual SAN cluster
C. When it is a member of a multi-extent datastore
D. When it is a member of a Virtual Volume
【单选题】
Immediately after installing ESXi, an administrator observes that the Configure Lockdown Mode option is grayed out in the Direct Console User Interface (DCUI). What is the most likely explanation? ___
A. The host has not yet been added to a vCenter Server.
B. The BIOS on the host does not have NX/XD enabled.
C. The ESXi host is running in evaluation mode.
D. The host requires a reboot before this feature is available.
【单选题】
Immediately after installing ESXi, an administrator observes that the Configure Lockdown Mode option is grayed out in the Direct Console User Interface (DCUI). What is the most likely explanation? ___
A. The host has not yet been added to a vCenter Server.
B. The BIOS on the host does not have NX/XD enabled.
C. The ESXi host is running in evaluation mode.
D. The host requires a reboot before this feature is available.
【单选题】
Which Single Sign-On deployment mode should an administrator use for two 6.x vCenter Servers configured with linked mode? ___
A. Basic Single Sign-On with vCenter Server Heartbeat
B. Multisite Single Sign-On
C. Basic Single Sign-On
D. Single Sign-On with Linked Mode
【单选题】
What is required when changing a virtual machine name using the vSphere Web Client? ___
A. Verify connectivity to the ESXi host where the virtual machine is running and its inventory list is accessible.
B. Verify in which datastore the virtual machine resides and that you have access and its inventory list is accessible.
C. Verify that virtual machine files are stored in the same datastore and can be accessed in the datastore browser list.
D. Verify the virtual machine is not running in Fault Tolerant mode and that it is not in a Distributed Resource Scheduler cluster.
【单选题】
An administrator deploys vRealize Operations into a vSphere 6.x environment. After the deployment, the administrator notices that badges are not appearing. What is a likely cause of this behavior? ___
A. Badges do not appear until you register vRealize Operations with vCenter Server.
B. Badges do not appear until you register a vCenter Server in vRealize Operations.
C. The vRealize Operations appliance needs to be redeployed.
D. The vCenter Server appliance needs to be redeployed.
【单选题】
How are ports scaled on vSphere Standard Switches (vSS)? ___
A. Ports on a vSS can be dynamically scaled up and down.
B. Ports on a vSS can only be statically scaled up or down.
C. Ports on a vSS can only be dynamically scaled down.
D. Ports on a vSS can only be dynamically scaled up.
【单选题】
A High Availability (HA) cluster is configured to respond to a given number of host failures. The cluster contains virtual machines configured with these settings: VM1 has a 1GHz CPU reservation and no Memory reservation VM2 has a 2GHz CPU reservation and no Memory reservation VM3 has no CPU reservation and no Memory reservation . Given this information, what is the correct slot size for the cluster? ___
A. The CPU Reservation should be set to 32MHz and the memory reservation should be set to 32MB plus memory overhead.
B. The CPU reservation should be set to 1 GHz and the memory reservation should be set to 0MB plus memory overhead.
C. The CPU reservation should be set to 2 GHz, and the memory reservation should be set to 0MB plus the virtual machine memory overhead.
D. The CPU reservation should be set to 2 GHz, and the memory reservation should be set to 32MB, plus the virtual machine memory overhead.
【单选题】
An administrator is planning a vSphere infrastructure with the following specific networking requirements: <The ability to shape inbound (RX) traffic> <Support for Private VLANs (PVLANs)> <Support for LLDP (Link Layer Discovery Protocol)>. What is the minimum vSphere Edition that will support these requirements? ___
A. vSphere Essentials Plus
B. vSphere Standard
C. vSphere Enterprise
D. vSphere
E. nterprise Plus
【单选题】
When you add an ESXi 6.x host to a new Cluster, which vSphere object owns the CPU and Memory resources of the hosts? ___
A. vCenter Server
B. Datacenter
C. Cluster
D. Host
【单选题】
A user is trying to retrieve objects from a SharePoint server and finds the request is taking an excessive amount of time. An administrator tries to isolate the issue and notes the following: Application performance is poor when compared to virtual machines on other hosts. Performance improves when the virtual machine is moved to another host. The virtual machine encounters higher than expected CPU %Ready times. What conclusion can be reached regarding the performance issues for this virtual machine? ___
A. Host Power Management is directly impacting virtual machine performance.
B. The virtual machine has a large number of snapshots.
C. The Path Selection Policy for the storage device is set differently on the affected host.
D. Network I/O control is configured for the portgroup.