【单选题】
[166]裂解气压缩机开车氮气置换要求O2含量___。
A. ≥78%体积分数
B. ≤0.2%体积分数
C. ≤2%体积分数
D. 都不对
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相关试题
【单选题】
[167]压缩机盘车油来自___。
A. 润滑油管
B. 控制油管
C. 主油泵出口
D. 事故油泵
【单选题】
[168]液相干燥器充液线来自___。
A. 液相干燥器出口
B. 液相干燥器入口
C. 丙烯塔
D. 丙烯压缩机
【单选题】
[169]正常生产中,再生气压力受___压力控制。
A. 裂解气压缩机出口
B. 冷箱
C. 燃料气
D. 裂解气压缩机一段入口
【单选题】
[170]乙烯压缩机事故停车,裂解气压缩机___。
A. 按停车按钮
B. 维持正常
C. 从急冷区放空
D. 从五段放空
【单选题】
[171]丙烯压缩机事故停车,碳二加氢反应器___。
A. 手动停车
B. 维持正常
C. 降温运行
D. 联锁停车
【单选题】
[172]压缩机喘振流量主要由___决定。
A. 压缩机转速和压缩机结构本身
B. 吸入压力
C. 吸入温度
D. 压缩机缸体数
【单选题】
[173]裂解气压缩机复水器正常工作压力为___MPa。
A. -0.0196
B. -0.196
C. -0.072
D. -0.72
【单选题】
[174]裂解气压缩机注水流量计应___安装。
A. 水平
B. 倾斜
C. 垂直
D. 呈一定角度
【单选题】
[175]润滑油从油泵出来先经过( )再经过___进入润滑油及控制油系统。
A. 冷却器 过滤器
B. 过滤器 冷却器
C. 减压阀 冷却器
D. 减压阀 过滤器
【单选题】
[176]中后冷凝器的冷却水来自___。
A. 循环水泵
B. 热水站
C. 复水泵
D. 都不对
【单选题】
[177]压缩机停车后油箱温度会___。
【单选题】
[178]压缩机叶轮背靠背排列的目的是___。
A. 减小径向推力
B. 减小轴向推力
C. 根据工艺需要
D. 根据现场安装需要
【单选题】
[179]压缩机的级数实际就是压缩机的___数。
【单选题】
[180]3A分子筛中的A表示分子筛的( ),1A的长度是___米。
A. 孔径 1-10
B. 孔径 1-8
C. 分子筛直径 1-10
D. 分子筛直径 1-8
【单选题】
[181]D-209通过___控制热甲烷调节阀来调节热甲烷流量。
A. FV-20022
B. TV-20030
C. FV-20023
D. TV-20034
【单选题】
[182]D-210充液前要先___。
【单选题】
[183]裂解气压缩机透平为___式,入口蒸汽等级为( ),抽汽等级为( )。
A. 抽汽冷凝式 VHS(超高压蒸汽) MS(中压蒸汽)
B. 抽汽冷凝式 VHS(超高压蒸汽) HS(高压蒸汽)
C. 抽汽冷凝式 HS(高压蒸汽) MS(中压蒸汽)
D. 抽汽冷凝式 HS(高压蒸汽) LS(低压蒸汽)
【单选题】
[184]乙烯制冷压缩机透平为___式,入口蒸汽等级为( ),抽汽等级为( )。
A. 抽汽冷凝式 VHS(超高压蒸汽) MS(中压蒸汽)
B. 抽汽冷凝式 VHS(超高压蒸汽) HS(高压蒸汽)
C. 抽汽冷凝式 HS(高压蒸汽) MS(中压蒸汽)
D. 抽汽冷凝式 HS(高压蒸汽) LS(低压蒸汽)
【单选题】
[185]丙烯制冷压缩机透平为___式,入口蒸汽等级为( ),抽汽等级为( )。
A. 抽汽冷凝式 VHS(超高压蒸汽) MS(中压蒸汽)
B. 抽汽冷凝式 VHS(超高压蒸汽) HS(高压蒸汽)
C. 抽汽冷凝式 HS(高压蒸汽) MS(中压蒸汽)
D. 抽汽冷凝式 HS(高压蒸汽) LS(低压蒸汽)
【单选题】
[186]PID图上阀门标记NNF是指___。
A. 氮气无流量
B. 正常无袋流
C. 正常无故障
D. 正常无流量
【单选题】
[187]PID图上阀门标记NC是指___。
A. 氮气阀
B. 氮气关
C. 正常关
D. 正常无流量
【单选题】
[188]原始开车状态,干燥器首次分子筛装填后要用___再生。
【单选题】
[189]裂解气压缩机防喘振控制阀中,温度较低的阀位号是___。
A. FZV-20028A
B. FZV-20028B
C. FZV-20001
D. FZV-20005
【单选题】
[190]不合格乙烯返回到压缩机___段出口。
【单选题】
[191] 碱洗塔进料温度通过调节阀___调节E-206的( )流量来控制。
A. FV-20012 盘油
B. FV-20012 急冷水
C. FV-20011 盘油
D. FV-20011 急冷水
【单选题】
[192]裂解气干燥器D-209床层干燥剂约___用于吸收水分,余下部分为保护区床层吸收。
A. 0.7
B. 0.8
C. 0.9
D. 0.95
【单选题】
[193]进入T-203裂解气中含有无色而具有臭鸡蛋气味的气体,其水溶液显弱酸性的物质是___。
A. SO2
B. H2S
C. HCl
D. CO2
【单选题】
[194]C-601高压蒸汽管线吹扫的注意事项,下列说法错误的是___。
A. 应把汽轮机主汽阀阀芯抽出
B. 暖管-吹扫-降温-暖管-吹扫-降温反复进行
C. 吹扫暖管时不需要排液
D. 汽轮机的抽气管道止逆阀至机体的管线不便吹扫,可人工清扫
【单选题】
[195]关于蒸汽管线吹扫前应具备的条件,下列说法错误的是___。
A. 支架是否牢固
B. 出口设有排放消音设备
C. 蒸汽导向管无滑动障碍
D. 弹簧支吊架应加弹簧固定装置
【单选题】
[196]有关装置吹扫的说法,下列操作错误的是___。
A. 安全阀与管道连接处断开,并加盲板
B. 仪表引压管线不应该吹扫
C. 吹扫汽轮机入口管线时,汽轮机要处于盘车状态
D. 蒸汽吹扫时必须充分暖管,并注意疏水
【单选题】
[197]高压蒸汽(HS)管线暖管合格的标准是温度大于___。
A. 250℃
B. 350℃
C. 420℃
D. 500℃
【单选题】
[198]超高压蒸汽(VHS)管线暖管合格的标准是温度大于___。
A. 250℃
B. 350℃
C. 420℃
D. 500℃
【单选题】
[199]C-201带负荷试验时所用介质一般为___。
【单选题】
[200]裂解气压缩机一至四段冲洗油(冲洗水)量逐渐___。
A. 增大
B. 减少
C. 不变
D. 先增后减
【单选题】
[201]关于防喘振阀,下列说法正确的是___。
A. 防喘振阀一般设计成快关慢开阀
B. 开防喘振阀时先高压后低压
C. 关防喘振阀时要先高压后低压
D. 开防喘振阀时要快
【单选题】
[202]干气密封主密封的作用是___。
A. 防止机体内物料外泄
B. 防止润滑油外泄
C. 防止润滑油漏入机体
D. 防止大气进入机体
【单选题】
[203]压缩机开车时,要遵循___的原则。
A. 升速要慢
B. 先升压后提速
C. 先提速后提压
D. 升速要快
【单选题】
[204]压缩机升速通过临界转速区域时,下列说法正确的是___。
A. 升速应平稳而均匀
B. 可作一定时间的停留
C. 要快速通过临界转速区域,不得长时间停留
D. 发生异常情况应强行通过
【单选题】
[205]压缩机开车时,关小返回时,要遵循___。
A. 先关低压,后关高压
B. 先关高压,后关低压
C. 高低压要同时关
D. 返回设为自动
【单选题】
[206]裂解气压缩机氮气运转后,系统接收裂解气之前,主密封气应为___。
A. 氮气
B. 低压蒸汽
C. 低压乙烯气
D. 高压乙烯气
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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?___
【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
【单选题】
Which vSphere 6.x feature will allow an organization to utilize native snapshots?___
A. Virtual Volumes
B. Virtual SAN
C. VMFS3
D. VMFS5
【单选题】
An administrator is creating a new vSphere Distributed Switch that will be utilized with a specific vSphere Cluster. The cluster itself contains a mix of ESXi 5.x and 6.x Hosts. Which Distributed Switch version should be created to support this configuration?___
A. Distributed Switch: 6.0.0
B. Distributed Switch: 5.0.0
C. Distributed Switch: 5.1.0
D. Distributed Switch: 5.5.0
【单选题】
Which load balancing policy, previously limited to vSphere Distributed Switches, is now available on vSphere Standard Switches with vSphere 6.x?___
A. Route based on physical NIC workload
B. Route based on IP Hash
C. Route based on the originating virtual port
D. Route based on Source MAC Hash