【判断题】
多段床身接合面刮削时,将被刮的接合面端用枕木垫高的目的是便于刮研
A. 对
B. 错
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工作台要牢固平稳,平台周围要保持整洁,通行要方便,1米内禁止堆放物件
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【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
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【单选题】
把电气设备的金属外壳及与外壳相连的金属构架与中性点接地的电力系统的零线连接起来,以保护人身安全的保护方式,叫___。
A. 保护接地
B. 保护接零
C. 工作接地
【单选题】
保护接零是指低压电网电源的中性点接地,设备外壳___
A. 与中性点连接
B. 接地
C. 接地或接零
【单选题】
保护接零适用于___运行方式。
A. 中性点不接地
B. 无中性线
C. 中性点直接接地
【单选题】
工作零线用___作安全色。
A. 黑色;
B. 淡蓝色;
C. 灰色。
【单选题】
为确保零线的安全可靠,保护零线的截面不小于相线截面的___。
A. 1/2
B. 1/3
C. 1/4
【单选题】
重复接地的作用是降低___断线时,漏电设备外壳的对地电压,减轻危险程度。
A. 地线
B. 相线
C. 零钱
【单选题】
10KV/0.4KV电力变压器低压侧中性点应进行工作接地,其接地电阻值应不大于___。
A. 8Ω
B. 4Ω
C. 10Ω
【单选题】
电气设备保护接地电阻越大,发生故障时漏电设备外壳对地电压___.
A. ,越低
B. ,不变
C. ,越高.
【单选题】
电器设备未经验电,一律视为___
A. , 有电,不准用手触及
B. , 无电,可以用手触及
C. , 无危险电压
【单选题】
维修电工在操作中,特别要注意___问题。
A. 戴好安全防护用品
B. 安全事故的防范
C. 安全文明生产行为
【单选题】
人体___是最危险的触电形式。
A. 单相触电
B. 两相触电
C. 跨步电压触电
【单选题】
发生电气火灾后必须进行带电灭火时,应该使用___.
A. , 消防水喷射
B. , 干粉灭火剂
C. ,泡沫灭火器
【单选题】
电压等级低于___伏的电器属于低压电器。
A. 36
B. 380
C. 1000
【单选题】
隔离开关的主要作用是___。
A. 拉合线路
B. 断开电流
C. 隔断电源;
【单选题】
对于照明和电加热负载,熔体的额定电流应为___倍负载额定电流。
A. 1
B. 1.5~2.5
C. 3~3.5
【单选题】
控制一台不经常启动的电动机时,熔断器熔体额定电流选为电机额定电流的___倍
A. 1
B. 1.5~2.5
C. 3~3.5
【单选题】
控制一台经常启动的电动机时,熔断器熔体额定电流选为电机额定电流的___倍
A. 1
B. 1.5~2.5
C. 3~3.5
【单选题】
热继电器中的双金属片弯曲是由于两金属片___
A. 机械强度不同
B. 热膨胀系数不同
C. 温差效应
【单选题】
热继电器中热元件的整定电流应为电动机额定电流的___倍
A. 0.7
B. 0.95~1.05
C. 1.5
【单选题】
控制按钮属于主令电器,它主要接在___。
A. 主回路
B. 控制回路
C. 主回路和控制回路
【单选题】
按钮的触头允许通过的电流较小,一般不超过___安。
A. 2
B. 5
C. 10
【单选题】
下列承担短路保护的电器是___
A. –交流接触器或中间继电器
B. --熔断器
C. —热继电器
【单选题】
下列承担过载保护的电器是___
A. –交流接触器或中间继电器
B. --熔断器
C. —热继电器
【单选题】
下列承担失压保护的电器一般为___
A. –交流接触器或中间继电器
B. --熔断器
C. —热继电器
【单选题】
一台30KW的三相交流电动机其输入的有功功率应该为___
A. 小于30KW
B. 等于30KW
C. 大于30KW
【单选题】
三相交流笼型异步电动机直接启动电流是额定电流的___
A. 2-4倍
B. 4-7倍
C. 6-8倍
【单选题】
三相交流笼型异步电动机的转速同___成正比。
A. 极对数
B. 电源频率
C. 电机功率
【单选题】
三相交流笼型异步电动机的转矩与___成正比。
A. 电流
B. 电压
C. 电压平方。
【单选题】
用摇表检查低压电动机定子绕组间绝缘、绕组对机壳绝缘电阻,其数值不应低于___
A. 0.5MΩ
B. 1MΩ
C. 2MΩ
【单选题】
三相异步电动机电源接后电机不能起动,造成故障的可能原因是___。
A. 电源电压过高或过低
B. 定子绕组接线错误
C. 鼠龙电动机转子断条
【单选题】
按钮联锁正反转控制线路的优点是操作方便,缺点是容易产生电源两相短路事故。在实际工作中,经常采用___正反转控制线路。
A. 按钮联锁
B. 接触器联锁
C. 按钮、接触器联锁
【单选题】
三相笼型交流异步电动机功率大于___时一般应采用降压启动。
A. 3KW
B. 7.5KW
C. 15KW
【单选题】
电磁抱闸制动的优点是此系统是在___。
A. 制动平稳
B. 失电后制动
C. 制动迅速
【单选题】
反接制动的优点是___。
A. 制动平稳
B. 失电后制动
C. 制动迅速
【单选题】
能耗制动的优点是___。
A. 制动平稳
B. 失电后制动
C. 制动迅速
【单选题】
行车、提升机采用的控制方式是___
A. 启动控制
B. 点动控制
C. 点动-启动混合控制
【单选题】
可编程序控制器简称为___。
A. CPU
B. PLC
C. CNC
【单选题】
___简称PLC。
A. 顺序控制器
B. 可编程序控制器
C. 微型计算机
【单选题】
可编程控制器的点数是指___。
A. 输入端子个数
B. 输出端子个数
C. 输入端子和输出端子个数的和
【单选题】
可编程控制器输入接口常接的部件有___
A. 开关量信号
B. 继电器线圈
C. 电动机