【单选题】
挥发分在20％～40％之间的煤称为___。
A. 烟煤；
B. 无烟煤；
C. 褐煤；
D. 贫煤。
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答案
A
解析
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相关试题
【单选题】
对于需要长期储存的煤，尤其是低变质程度的煤，组堆时要___，减少空气和雨水的透入，防止煤的自燃。
A. 和其他煤一起存放；
B. 可以任意堆放；
C. 分层压实；
D. 块末分离。
【单选题】
设备的一级保养以操作人员为主，维修人员为辅。对设备进行局部检查时设备一般每运行___h 进行一次一般保养。
A. 300～400；
B. 200～400；
C. 500～700；
D. 800～1000。
【单选题】
推煤机如需放机油并且使悬浮在表面的杂质随机油一起排除时，应在发动机熄灭后___。
A. 立即进行；
B. 冷却一段时间后进行；
C. 温度与环境温度相同时再进行；D、低于环境温度时进行。
【单选题】
库存煤盘点一般___，盘点前需将煤场、煤沟等库存煤整理成一定形状，然后丈量计算出体积，并根据煤的密度计算出库存煤量。
A. 每月进行三次；
B. 每月进行一次；
C. 三个月进行一次；
D. 半年进行一次。
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vSphere 6.5 introduced MAClearning capabilities for VMware’s virtual switches. What three benefits will it provide? (Choose three.)___
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【单选题】
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Which command will show the iSCSI sessions on a ESXi 6.5 host?___
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A virtual machine is connected on a distributed port group where the average bandwidth configured in the traffic shaping policy is 100 Mbps. The VM network adapter is configured with a reservation of 200 Mbps. What is the VM’s effective bandwidth?___
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【多选题】
What are two reasons why a datastore in a Storage DRS cluster cannot enter maintenance mode?(Choose two.)___
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【多选题】
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【多选题】
A vSphere Administrator observes that the Primary VM configured with Fault Tolerance is executing slowly. After further investigation, it is determined that the Secondary VM is on an overcommitted ESXi host. What two methods will correct the problem? (Choose two.)___
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An administrator wants to enable proactive HA by moving virtual machines automatically if a hardware alert is triggered. What are the three required settings? (Choose three.)___
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E. SXi host(s).
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In network troubleshooting it is important to know what upstream switch the ESXi host is connected to. Which two features does ESXi provide to help identify the upstream switch? (Choose two.)___
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Virtual Volumes supports which three VMware features? (Choose three.)___
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【多选题】
vSphere DRS helps to balance virtual machines with available resources in a vSphere cluster. What three types of resources can be taken into account for balancing? (Choose three.)___
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Which three design requirements must be satisfied to enable RAID-6 objects in a VMware vSAN cluster? (Choose three.)___
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B. vSAN stretched cluster
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E. all flash configuration
【多选题】
When using "Cluster resource percentage" for host failover capacity in vSphere HA Admission Control, the total resource requirements are calculated from which two values? (Choose two.)___
A. Total vCPUs assigned to each VM.
B. Average CPU usage on each VM over time.
C. Memory reservations on each VM.
D. Total memory assigned to each VM.
E. Average active memory on each VM over time.
F. CPU reservations on each VM.
