【多选题】
Which two components can be used when configuring Enhanced Linked Mode? (Choose two.)___
A. vCenter Server Appliance
B. vRealize Operations Manager
C. vSphere Management Appliance
D. vCenter Server for Windows
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相关试题
【多选题】
An organization has a number of virtual machines that would benefit from Fault Tolerance. These include: <A single vCPU Apache Server> < A dual vCPU vCenter Server> < A quad vCPU SQL Server> <An eight vCPU Hadoop Server>. Which two virtual machines can be configured to use VMware Fault Tolerance? (Choose two.)___
A. Apache Server
B. vCenter Server
C. SQL Server
D. Hadoop Server
【多选题】
Which two badges are major badges in vRealize Operations? (Choose two.)___
A. Risk
B. Efficency
C. Workload
D. Faults
【多选题】
An administrator is deploying multiple Windows 2003 Virtual Machines from the same template. What two steps should be taken to avoid network conflicts? (Choose two.)___
A. Customize the guest operating system.
B. Install VMware Tools into the new virtual machines.
C. Copy the Microsoft Sysprep tools onto the vCenter Server system.
D. Ensure the e1000 vmnic is selected for each new virtual machine.
【多选题】
Which three conditions would prevent Storage I/O Control from being enabled on a group of datastores? (Choose three.)___
A. The datastores planned for the solution are used by different vSphere clusters.
B. A datastore planned for the solution is configured as a Raw Device Mapping file.
C. A datastore planned for the solution has three extents.
D. A datastore planned for the solution is configured as NFS.
E. The organization has an Enterprise license.
【多选题】
Which two actions are prerequisites to adding ESXi 6.x hosts to a vSphere Distributed Switch? (Choose two.)___
A. Verify that there is at least one Distributed Port Group on the Distributed Switch.
B. Verify that the Distributed Port Group have active uplinks configured in its teaming and failover policy.
C. Verify that the
D. istributed Switch has been configured with a Network Profile.
【多选题】
An organization has configured Distributed Power Management (DPM) on a vSphere 6 cluster. The organization wants to be alerted when an ESXi host has been powered down by DPM. Which two options represent the type and name of the alarm that would accomplish this? (Choose two.)___
A. DrsEnteringStandbyModeEvent
B. DrsEnteredStandbyModeEvent
C. Event-based
D. Condition-based
【多选题】
Which two allow for the disabling of Network Rollback operations? (Choose two.)___
A. Modifying the vpxd advanded configuration options and adding the config.vpxd.network.rollback key
B. Modifying the C:\ProgramData\VMware\CIS\cfg\vmware-vpx\vpxd.cfg file and adjusting the<rollback> xml tag
C. Modifying the C:\ProgramData\VMware\CIS\cfg\vmware-vpx\vpxd.cfg file and adjusting the <networkrollback> xml tag
D. Modifying the C:\ProgramData\VMware\CIS\cfg\vmware-vpx\firstboot\vpxd-service- spec.prop file and adjusting the <rollback> xml tag
【多选题】
An administrator is tasked with performing a vMotion migration of a virtual machine. The virtual machine is configured as follows: <vSphere Flash Read Cache (vFRC) enabled> <Is part of a Distributed Resource Cluster (DRS) Cluster> Which two statements are true? (Choose two.)___
A. Each ESXi host in the cluster supports multiple virtual flash resources.
B. Each ESXi host in the cluster supports one virtual flash resource.
C. DRS treats powered-on virtual machines with Flash Read Cache as having a preferred affinity to their current host and moves them only for mandatory reasons.
D. DRS treats powered-on virtual machines with Flash Read Cache as having a required affinity to their current host and does not move them.
【多选题】
An administrator is using the Host Failures to Tolerate Admission Control Policy for a vSphere High Availability ___ cluster. When configuring this setting on the cluster, the administrator sees this error message: <Insufficient resources to satisfy HA failover level on cluster > What are two likely causes for the error? (Choose two.)(AB)
A. The hosts in the cluster are disconnected.
B. A host in the cluster is displaying an HA error.
C.
D. istributed Resource Scheduler has not been configured on the cluster.
【多选题】
What are two ways to identify TCP/IP stack information? (Choose two.)___
A. Using the vSphere Web Client
B. Using esxcli network ip netstack
C. Using esxcfg-netstack
D. Using the vSphere Client
【多选题】
Which two actions are required when enabling vFlash Read Cache for a virtual machine's virtual disk? (Choose two.)___
A. A value in the Virtual Flash Read Cache text box must be entered.
B. A Flash Resource Pool for Cache size reservation must be entered.
C. The Device backing and the block size must be configured.
D. The
E. nable virtual flash host swap cache check box must be selected.
【多选题】
What two IT infrastructure components are virtualized by vSphere Essentials? (Choose two.)___
A. Networks
B. Applications
C. Storage
D. Management
【多选题】
When attempting to access a virtual machine, an administrator is unable to login using the vSphere credentials. What two options are probable causes of the authentication failure? (Choose two.)___
A. The vSphere credentials have not been granted permissions.
B. The vSphere credentials are granted read-only permissions.
C. The vSphere credentials are granted no-access permissions.
D. The vSphere credentials are not a member of the local administrator group.
【多选题】
An administrator is performing a scripted installation of ESXi 6.x. In which three locations does the script need to be? (Choose three.)___
A. PXE Server
B. HTTPS
C. FTP
D. NFS
E. VVOLs Datastore
【多选题】
In order for a company to meet regulatory requirements, all ESXi 6.x Hosts must be configured to direct logs to a syslog server. What are two ways ESXi hosts can configured for this action? (Choose two)___
A. Use the esxcli system syslog command.
B. Edit them in the ESXi host Advanced System Settings.
C. From the Syslog collector user interface of the Web Client.
D. Syslog logging is not available for
E. SXi Hosts.
【多选题】
Which three actions can be executed when an alarm is triggered? (Choose three.)___
A. Send an email.
B. Send an SNMP trap.
C. Run a script or command.
D. Run an Orchestrator workflow.
E. Send a trigger to syslog.
【多选题】
An administrator is attempting to power on a virtual machine, but is unable to do so. Which two reasons are probable causes of the failure? (Choose two.)___
A. Storage access to the virtual machine swap file has been lost.
B. One of the virtual machine VMDK files is locked.
C. Virtual machine is running CentOS 7.0 64-bit.
D. Virtual machine has Hyper-Threading enabled.
【多选题】
An administrator has configured a host profile so that ESXi 6.x hosts will point to the corporate NTP server for time synchronization. The NTP server is located at 10.0.30.213, but time has not been synchronized properly across the ESXi hosts. The administrator reviews Host Profile settings as shown in the Exhibit. Which two steps are required to resolve the issue? (Choose two.)___
A. Correct the NTP server IP address.
B. Check the host for host profile compliance.
C. Remediate the host based on the updated host profile.
D. Change the NTP server to the FQDN as IP Addresses are not supported.
【多选题】
An administrator is attempting to migrate a large Hadoop virtual machine using vMotion. The administrator notices a delay when the machine is quiesced. The Hadoop virtual machine is processing many transactions a second to an in-memory database. Which two actions would help reduce the amount of time needed to perform a vMotion on this virtual machine? (Choose two.)___
A. Use multiple NICs for the vMotion vmkernel port.
B. Use a 10Gbps Network card for the vMotion vmkernel port.
C. Add an additional management network to help transmit the data quicker.
D. Disable Fault Tolerance before performing the vMotion.
【多选题】
An administrator is installing a new network card in an ESXi 6.x host that is part of a vSphere cluster. When the host is placed into maintenance mode, the vSphere Web Client displays the progress bar at 2% for over 30 minutes. Which two are likely reasons for this occurrence? (Choose two.)___
A. Maintenance mode is unable to migrate all virtual machines from the host.
B. There is a large number of virtual machines that must be migrated from the host.
C. VMware High Availability is in the process of reconfiguring the cluster.
D. Each virtual machine on the
E. SXi host must be reconfigured to recognize the new adapter.
【多选题】
Which two events happen when Distributed Resource Scheduler (DRS) is disabled? (Choose two.)___
A. The cluster's resource pool heirarchy and affinity rules are re-established when DRS is turned back on.
B. The cluster's resource pool hierarchy and affinity rules are not re-established when DRS is turned back on.
C. The cluster's resource pools are removed from the cluster.
D. The cluster's resource pools are removed from the cluster and assigned to the hosts.
【多选题】
Which two networking connection types can be configured on a virtual switch? (Choose two.)___
A. Virtual machine portgroups
B. VMkernel services (such as NFS, iSCSI, or vMotion) to the physical network
C. Web services over the Management Network
D. NFS and FCoE storage services
【多选题】
An administrator creates a DRS cluster of eight ESXi 6.x hosts. There are 10 virtual machines balanced across the hosts. An attempt to place the first host into maintenance mode fails. What are two reasons that the host failed to enter maintenance mode? (Choose two.)___
A. The DRS cluster Automation Level is set to Partially Automated mode.
B. One of the virtual machines on the ESXi Host entering maintenance mode is configured with a DRS Host affinity rule Should run on hosts in group.
C. One of the virtual machines on the ESXi Host entering maintenance mode is configured with a DRS Host affinity rule Must run on hosts in group.
D. One of the virtual machines on the
E. SXi Host entering maintenance mode is configured with an individual Automation Level set to Partially Automated.
【多选题】
When modifying a vApp, which two vSphere entities can be added? (Choose two.)___
A. A resource pool
B. A network pool
C. A vApp
D. A folder
【多选题】
From which two locations in the inventory hierarchy can you deploy a virtual machine using a template? (Choose two.)___
A. Directly from the template.
B. From a compute resource.
C. From an existing virtual machine.
D. From a Datastore.
【多选题】
A company has decided to implement Virtual SAN within their vSphere 6.x environment. The Virtual SAN cluster will be composed of three ESXi 6.x hosts that are on the Virtual SAN Ready Node list. Each ESXi host includes: <Two SAS Controllers that support Passthrough Mode> < Four Solid State Drives (SSDs) 1TB in size each> <20 SAS Magnetic Disks (MDs) 1TB in size each> <The SSDs and MDs are evenly split between the two SAS controllers>. The company will pilot a Virtual SAN cluster utilizing VMware best practices while maximizing storage capacity. The Virtual SAN cluster will use Manual Mode. Which two Disk Group configurations would meet the stated configuration requirements? (Choose two.)___
A. 4 disk groups with 1 SSD and 5 MDs each
B. 2 disk groups with 1 SSD and 7 MDs each
C. 2 disk groups with 2 SSDs and 7 MDs each
D. 2 disk groups with 1 SSD and 10 MDs each
【多选题】
A physical Windows 2008 R2 Server is converted to a virtual machine using VMware vCenter Converter. Upon completion of the conversion and subsequent power on operation, the virtual machine fails to boot and the message below is observed in the Console of the virtual machine: <STOP 0x0000007B INACCESSIBLE_BOOT_DEVICE>. Which two potential issues may be causing this boot failure? (Choose two.)___
A. An incorrect SCSI controller was selected during conversion.
B. Incompatible software drivers were migrated into the virtual machine from the source machine.
C. The vmdk file backing the virtual machine was thick provisioned.
D. A snapshot was taken immediately after the conversion completed.
【多选题】
An administrator is configuring the Failover Order option on a vSphere Distributed Switch. Which two options should be used with IP-hash load balancing? (Choose two.)___
A. Active Uplinks
B. Standby Uplinks
C. Unused Uplinks
D. Override Failover Order
【多选题】
An administrator is configuring the Maximum Transmission Unit value on a vSphere Distributed Switch. Which two options are typical values for ESXi networking? (Choose two.)___
A. 1492
B. 1500
C. 9000
D. 9089
【多选题】
Which two configurable options apply to both virtual machine CPU and memory allocation? (Choose two.)___
A. Reservation
B. Shares
C. Resource Pool
D. Reserve All
【多选题】
When attempting to power on a Virtual Machine you observe the following error: <Cannot open the disk '/vmfs/volumes/volume/vm/vm-000002.vmdk' or one of the snapshot disks it depends on.> Which three actions will be the best solutions to address this problem? (Choose three.)___
A. Verify that the virtual machine's disk files are present.
B. Investigate the host and virtual machine log files.
C. Verify the vmdk descriptor files and if required, recreate them.
D. Delete the disk file preventing the power on operation.
E. Migrate or register the virtual machine to a different host.
【多选题】
An administrator has been tasked with enabling High Availability ___ on a cluster in a vSphere 6.x environment with default settings. The cluster configures properly and there are no errors. The next day when powering on a virtual machine, an error is presented: <Not Enough Failover Resources>. Which three scenarios are likely causes of this error message? (Choose three.)(CDE)
A. The default VM Monitoring Sensitivity is set too high.
B. There are not enough datastore heartbeat datastores configured by default.
C. The default slot size in the cluster is set too high.
D. There are virtual machines with large CPU reservations.
E. A host is in maintenance mode for a replacement of a failed Hard Drive.
【多选题】
vMotion can be performed between which three physical boundaries? (Choose three.)___
A. Between two vCenter Server Systems
B. Between two vSphere Distributed Virtual Switches
C. Between two vCenter Server Datacenter objects
D. Between two VMware NSX Layer 4 segments
E. Between two NFS datastores
【多选题】
An administrator configures vSphere Replication for a virtual machine and enables multiple point in time (PIT) instances under the recovery settings in the Configure Replication wizard. Which two statements are correct for vSphere Replication with multiple point in time instances enabled? (Choose two.)___
A. vSphere Replication retains a number of snapshot instances of the virtual machine on the target site based on the retention policy that you specify.
B. vSphere Replication uses the virtual machine's snapshot instances to define the target site Point in Time instance based on the retention policy that you specify.
C. vSphere Replication does not support virtual machines with snapshots.
D. vSphere Replication supports virtual machines with snapshots.
【多选题】
An administrator is virtualizing a physical application server and adding it to an existing multi-tiered vApp. The application license is currently tied to the physical NIC's MAC address, so the administrator needs to ensure the license will function properly in the virtual machine. Which two actions can the administrator take to satisfy this task? (Choose two.)___
A. Set the MAC address for the vNIC in the guest operating system.
B. Install the physical server's NIC into the ESXi host.
C. Configure the MAC address for the vNIC using the vSphere Web Client.
D. Assign the physical server NIC's MAC address in the vSphere Distributed Switch.
【多选题】
Which two Fibre Channel zoning options are supported with vSphere 6.x? (Choose two.)___
A. Single-Initiator
B. Single-Initiator-Single-Target
C. Multiple-Initiators-Single-Target
D. Multiple-Initiators-Multiple-Targets
【多选题】
An administrator is attempting to remove an ESXi 6.x host from a vSphere Distributed Switch (vDS). When the administrator attempts to remove the host, the following error is observed: <The resource '16' is still in use.> What three steps are needed to successfully remove the host from the switch? (Choose three.)___
A. Select Manage Ports on the vDS for the host.
B. Locate all ports currently in use on the vDS for the host.
C. Migrate or delete any vmkernel or virtual machine adapters associated with the switch.
D. Remove all network cards from the switch before trying to remove the host.
E. Create a standard switch for everything to be automatically be migrated to.
【多选题】
Which two Virtual SAN related actions might start resynchronization of virtual machine objects? (Choose two.)___
A. Editing a virtual machine storage policy to increase the number of replicas.
B. Editing a virtual machine storage policy to reduce the number of replicas.
C. Editing a virtual machine storage policy to increase the number of disk stripes.
D. Editing a virtual machine storage policy to reduce the number of disk stripes.
【多选题】
An administrator is troubleshooting basic network connectivity issues. Which two scenarios are potential issues that this administrator might face? (Choose two.)___
A. The vSwitch is not attached to the correct physical network.
B. The portgroup is not configured to use correct VLAN.
C. Traffic shaping is configured incorrectly.
D. Jumbo frames is configured incorrectly.
【多选题】
Which three items should be validated prior to installing ESXi 6.x? (Choose three.)___
A. Remote Storage has been disconnected.
B. Installation media is available.
C. Server hardware clock is set to UTC.
D. Storage has been partitioned with a VMFS volume.
E. Network cards have been setup to use Jumbo
F. rames.
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【单选题】
现场检查线网控制中心应急信息发布功能,当发布条件对应发布级别达到需要其他线路或线网配合发布信息时,线网控制中心负责()发布工作或线网控制中心将应急信息的发布授权到受影响的相关线路运行控制中心具体实施;___
A. 相关信息
B. 对外媒体
C. 应对方案
D. 统筹乘客应急信息
【单选题】
查阅对外联络联系记录或者联合应急演练记录,应建立与()、公安、气象、卫生、供电、通信等部门或单位的联络工作机制。___
A. 环保
B. 交通运输
C. 教育
D. 城市轨道
【单选题】
查阅应急预案、应急演练等文件,核查线网应急应具备()三级的应急点结构。___
A. 站台-票厅-车控室
B. 站点-区域-基地
C. 车站-控制中心-车辆段
D. DCC-OCC-集团
【单选题】
站点即以车站为一线应急响应点,能够简单处理___。
A. 一般事件
B. 较大事件
C. 重大事件
D. 困难事件
【单选题】
区域即区域应急中心,能够以较为专业的能力实现对()的处置。___
A. 一般事件
B. 较大事件
C. 重大事件
D. 困难事件
【单选题】
区域应急中心的处置能力应至少覆盖()公里半径范围内线网,实现救援人员20分钟内到达事故现场的响应速度。___
【单选题】
站点应配置应急手持台、()、便携式扶梯等通用应急救援设备、工具。___
A. 大灯
B. 手电筒
C. 手提应急灯
D. 扫把
【单选题】
区域应急中心应配置尖轨、钢轨、防洪沙袋、()等小型救援设备及应急物资。___
【单选题】
应急基地应配置专用()、轨道车、通信设备、接触网抢险设备、车辆起复等大型工器具及应急物资。___
A. 电客车
B. 平板车
C. 工程抢修车
D. 钢轨打磨车
【单选题】
查阅线网各运营线路客流统计数据和列车运行计划资料,测算线路实际运行能力与()的匹配情况。___
【单选题】
结合各线路高峰小时断面客流量、(),以及大客流换乘站、常态化限流车站分布,分析判断线网运力协调不匹配的换乘站,以及运能运量变化 对网络整体可靠性的影响。___
A. 列车满载率
B. 超载情况
C. 超重重量
D. 列车乘客数量
【单选题】
查阅线网运力协调不匹配换乘站的客流组织方案,应明确车站设备通过能力、站厅站台容纳能力、()、客流瓶颈部位等安全风险关键点。___
A. 安全风险
B. 闸机状态
C. 电梯情况
D. 易发生对冲区域
【单选题】
岗位定员、各岗位工作内容和操作要求,以及应急情况下车站客流疏散流线、信息发布、()保障等要求。___
A. 换乘安全
B. 乘客安全
C. 人员安全
D. 设备安全
【单选题】
现场检查换乘站换乘客流情况,存在换乘通道阻塞、()等大客流的,应评估线路列车运行计划,检查换乘站客流组织方案相关针对性措施及落实情况。___
A. 人员过多
B. 站台拥挤
C. 人员杂乱
D. 无人排队
【单选题】
换乘站的换乘通道、出入口等区域()划分清晰,共管换乘站涉及不同运营单位的,应签订相关管理协议。___
A. 管理者
B. 管理责任界面
C. 标志
D. 区域范围
【单选题】
车控室内宜具有(),视频监控宜具备互看对方站台、通道内的能力。___
A. 手机
B. 电台
C. 电视
D. 直通电话
【单选题】
第三方安全评估机构应对线网各运营单位在评估期间发生的运营安全隐患,按照()和治理难度,结合行业经 验教训和当地运营实际,分业务领域抽取已发现的运营安全隐患进行具体分析对照。___
A. 隐患危害性
B. 危害程度
C. 危害结果
D. 不良影响
【单选题】
行车组织、客运组织、设施设备运行维护、 人员管理、应急管理、运行环境等板块纳入评估范围的隐患数量均不应少于()个。___
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对于重大隐患、治理时间超过()个月的隐患及专 家认为对运营安全有较大影响的隐患,应全部进行具体分析对照。___
【单选题】
查阅隐患涉及的运营管理制度、运营安全规章、设施设备操作手册和维护规程、()和演练记录、人员教育培训记录及其他相关材料,检验运营单位有关制度体系是否健全、合理。___
A. 救援演练
B. 消防演练
C. 急救演练
D. 应急预案
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对隐患涉及的管理人员、关键岗位人员等进行现场问询、 现场检查,可根据需要开展(),检验人员专业技能和应急处置能力。___
A. 理论考试
B. 场景模拟测试
C. 实操考试
D. 专业检验
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查阅隐患涉及的设施设备运行数据和检修维护台账等, 可根据需要对设施设备进行(),检验设施设备运行状态及维护工作情况。___
A. 专项检测
B. 投放使用
C. 使用故障查询
D. 模拟故障测试
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针对运营险性事件的发生经过和处置情况、事件发生的原因等情况,现场问询或问卷调查()、关键岗位人员等对该运营险性事件的认知和相关业务技能掌握情况. ___
A. 负责人
B. 监护人
C. 安全管理人员
D. 工班长
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城市轨道交通运营期间安全评估规范自什么时候实施,有效期3年。___
A. 2021/4/1
B. 2020/4/1
C. 2019/4/1
D. 2018/4/1
【单选题】
等城市轨道交通线网的运营期间安全评估工作适用《城市轨道交通运营期间安全评估规范》。___
A. 地铁、轻轨
B. 公交
C. 高铁
D. 城铁
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网络化运营安全评估包括()、线网应急能力评估、换乘站客流匹配评估。___
A. 应急预案
B. 应急演练
C. 线网控制中心功能评估
D. 应急疏散
【单选题】
现场检查线网控制中心运行状态监控功能,可对() 、客流、设备运行和主要故障、乘客视频信息等进行24小时连续不间断监视和管理。___
【单选题】
查阅对外联络联系记录或者联合应急演练记录,应建立与 ()、公安、气象、卫生、供电、通信等部门或单位的联络工作机制,联络工作机制运转有效。___
A. 行车
B. 安全
C. 技术
D. 交通运输
【单选题】
通过查阅应急点分布文件、应急救援模拟等方式,核实应急点布局和救援响应速度:区域应急中心的处置能力应至少覆盖( )公里半径范围内线网,实现救援人员20分钟内到达事故现场的响应速度,各区域应急中心的处置能力应能覆盖整个线网;应急基地的处置能力原则上应具备救援人员30分钟内到达事故现场的响应速度。___
【单选题】
城市轨道交通运营期间安全评估规范自2020年4月1日实施,有效期___
A. 2021/4/1
B. 3年
C. 2019/4/1
D. 2018/4/1
【单选题】
网络化运营安全评估包括线网控制中心功能评估、()、换乘站客流匹配评估。___
A. 应急预案
B. 应急演练
C. 线网应急能力评估
D. 应急疏散
【单选题】
现场检查线网控制中心运行状态监控功能,可对行车、() 、设备运行和主要故障、乘客视频信息等进行24小时连续不间断监视和管理。___
【单选题】
通过查阅应急点分布文件、应急救援模拟等方式,核实应急点布局和救援响应速度:区域应急中心的处置能力应至少覆盖5公里半径范围内线网,实现救援人员 ( ) 分钟内到达事故现场的响应速度,各区域应急中心的处置能力应能覆盖整个线网;应急基地的处置能力原则上应具备救援人员30分钟内到达事故现场的响应速度; ___
【单选题】
第三方安全评估机构应对线网各运营单位提交 的评估准备材料进行全面梳理分析,要对运营安全风险数据库的()、科学性、可操作性和动态管理情况进行全面评估; ___
【单选题】
现场检查线网控制中心运行状态监控功能,可对行车、客流、()、乘客视频信息等进行24小时连续不间断监视和管理。___
A. 安全
B. 设备运行和主要故障
C. 技术
D. 材料
【单选题】
查阅对外联络联系记录或者联合应急演练记录,应建立与交通运输、( ) 、气象、卫生、供电、通信等部门或单位的联络工作机制,联络工作机制运转有效。___
【单选题】
第三方安全评估机构应对线网各运营单位提交 的评估准备材料进行全面梳理分析,要对运营安全风险数据库的全面性、( ) 、可操作性和动态管理情况进行全面评估; ___
【单选题】
通过查阅应急点分布文件、应急救援模拟等方式,核实应急点布局和救援响应速度:区域应急中心的处置能力应至少覆盖5公里半径范围内线网,实现救援人员20分钟内到达事故现场的响应速度,各区域应急中心的处置能力应能覆盖整个线网;应急基地的处置能力原则上应具备救援人员 ( ) 分钟内到达事故现场的响应速度; ___
【单选题】
第三方安全评估机构应对线网各运营单位提交 的评估准备材料进行全面梳理分析,要对运营安全风险数据库的全面性、科学性、 ( ) 和动态管理情况进行全面评估; ___
A. 可操作性
B. 安全
C. 技术
D. 材料
【单选题】
查阅对外联络联系记录或者联合应急演练记录,应建立与交通运输、公安、 ( ) 、卫生、供电、通信等部门或单位的联络工作机制,联络工作机制运转有效。___