【判断题】
焓熵图中湿蒸汽区等压线就是等温线
A. 对
B. 错
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气体温度越高,气体的流动阻力越大
A. 对
B. 错
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气体在平衡状态下可以认为各部分具有相同的压力、温度、比容
A. 对
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热机在热力循环中,不可能将热源提供的热量全部转变为机械功
A. 对
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5级仪表的精度比0.25级仪表的精度低
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B. 错
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当物体冷却收缩受到约束时,物体内产生压缩应力
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衡量火电厂经济运行的三大指标是:发电量、煤耗和厂用电率
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卡诺循环的四个热力过程是吸热、膨胀、放热、压缩
A. 对
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目前大多数电厂中的冷却水系统均采用闭式循环,故系统内的水不会减少,也不需要补水
A. 对
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离心泵正常运行中轴承钨金瓦不超过温度80℃,滚珠轴承不超过100℃
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水塔的蒸发量只与机组的负荷大小有关
A. 对
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机组运行中,当循环泵突然掉闸后,凝汽器水侧中的水不流动,对保护凝汽器铜管最有利
A. 对
B. 错
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循环水允许的浓缩倍率越大节水效果越明显
A. 对
B. 错
【判断题】
循环水管道由于工作温度低,其热伸长值较小,依靠管道本身的弹性压缩即可作为热伸长的补偿
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汽轮机停机后真空到零,如果凝结器水位不高可以马上停止循环水泵运行
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抽气器的任务是将漏入凝汽器内的空气和蒸汽中所含的不凝结气体连续抽出,保持凝汽器在高度真空下运行
A. 对
B. 错
【判断题】
凝汽器的作用是建立并保持真空
A. 对
B. 错
【判断题】
凝汽器端差是指汽轮机排汽压力下的饱和温度与循环冷却水出口温度之差
A. 对
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凝汽器在正常运行中有除氧作用,从而提高凝结水质量
A. 对
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【判断题】
汽机排汽在凝结器内凝结过程可以近似看作变压、变温凝结放热过程
A. 对
B. 错
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汽轮机的排汽在凝结器中凝结成水,只放出汽化潜热,但温度不变
A. 对
B. 错
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汽轮机热态启动时凝汽器真空适当保持低一些
A. 对
B. 错
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汽轮机运行中,凝汽器入口循环水水压升高,则凝汽器真空升高
A. 对
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【判断题】
汽轮机运行中当凝汽器管板脏污时,真空下降,排汽温度升高,循环水出入口温差减小
A. 对
B. 错
【判断题】
提高凝汽器真空,可提高机组运行经济性, 但是,凝汽器的真空不是提高得越多越好
A. 对
B. 错
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运行中不停用凝汽器进行凝汽器冷却水管冲洗的唯一方法是反冲洗法
A. 对
B. 错
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运行中凝汽器进行半边隔离时,应先隔离水侧,然后关闭空气门
A. 对
B. 错
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凝汽器的端差是指凝汽器排汽温度与凝汽器循环水进口温度之差
A. 对
B. 错
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凝汽系统的投用工作应在锅炉点火后完成
A. 对
B. 错
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凝汽器的空气冷却区可以减轻抽气器的负担,改善抽汽效果
A. 对
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凝汽器运行中,当不锈钢管结垢时,将导致循环水传热下降
A. 对
B. 错
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汽轮机正常运行中凝汽器的真空不是靠真空泵来建立的
A. 对
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凡是经过净化处理的水都可以作为电厂的补给水
A. 对
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凝结水泵安装在热水井下面0.5~0.8m处的目的是防止水泵汽化
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为保证凝结水泵在高度真空下工作,需用生水密封盘根
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一般每台汽轮机均配有两台凝结水泵,每台凝结水泵的出力都必须大于或等于凝汽器最大负荷时的凝结水量
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备用凝结水泵的出口电动门应处于关闭状态
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What are two benefits of using NFS 4.1 with vSphere 6.x as compared to NFS 3? (Choose two.)___
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Which three statements are true regarding Fault Tolerance? (Choose three.)___
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An administrator is unable to remove an ESXi 6.x host from a vSphere Distributed Switch. What are two likely reasons for this issue? (Choose two.)___
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What are three goals of resource management within a cluster? (Choose three.)___
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Which three actions can be taken as a result of executing the vSphere Update Manager 6.x scan and remediation wizards? (Choose three.)___
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An administrator is attempting to power on a virtual machine, but the task is hanging at 95%. What three scenarios best explain why this problem is happening? (Choose three.)___
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Which three features are not supported when using Fault Tolerance in vSphere 6.x? (Choose three.)___
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【多选题】
Which three are requirements when using vMotion to move a virtual machine across vCenter Server systems? (Choose three.)___
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【多选题】
Which two components can be used when configuring Enhanced Linked Mode? (Choose two.)___
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【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.)___
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【多选题】
Which two badges are major badges in vRealize Operations? (Choose two.)___
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【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.)___
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【多选题】
Which three conditions would prevent Storage I/O Control from being enabled on a group of datastores? (Choose three.)___
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【多选题】
Which two actions are prerequisites to adding ESXi 6.x hosts to a vSphere Distributed Switch? (Choose two.)___
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【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.)___
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【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.)___
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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.
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【多选题】
What are two ways to identify TCP/IP stack information? (Choose two.)___
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B. Using esxcli network ip netstack
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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.