【判断题】
电磁操动机构是利用(电磁功)产生的机械操作力矩使开关完成合闸的。
A. 对
B. 错
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【判断题】
移动式电气设备的电源线应采用(橡皮绝缘)类型软电缆。
A. 对
B. 错
【判断题】
人体触电时,电流灼伤和电弧烧伤是由于电流的(热量)效应造成的。
A. 对
B. 错
【判断题】
运行中的电压互感器相当于一个(空载运行)的变压器。
A. 对
B. 错
【判断题】
高压电气设备停电检修时,防止检修人员走错位,误入带电间隔及过分接近带电部分 , 一般采用(遮拦)进行防护。
A. 对
B. 错
【判断题】
电气设备由事故转为检修时,应(填写工作票)。
A. 对
B. 错
【判断题】
对于 10kV 电容器的电流速断保护 , 动作时间为( 0)秒。
A. 对
B. 错
【判断题】
跌落式熔断器在短路电流通过后 , 装在管子内的熔体快速(熔断)断开一次系统。
A. 对
B. 错
【判断题】
两只额定电压相同的电阻 , 串联接在电路中 , 其阻值较大的电阻发热(较大)。
A. 对
B. 错
【判断题】
倒闸操作应由二人进行 , 一人唱票与监护 , 另一人(复诵与操作)。
A. 对
B. 错
【判断题】
高压配电线路的电压等级在( 110) kV 及以上。
A. 对
B. 错
【判断题】
电缆终端头,根据现场运行情况每( 1 至 3 年)停电检修一次。
A. 对
B. 错
【判断题】
(兆欧表)仪表属于直读式仪表。
A. 对
B. 错
【判断题】
雷电过电压又称为(外部)过电压。
A. 对
B. 错
【判断题】
35kV 及以上用户受电端电压的波动幅度不应超过额定电压的(± 5%)。
A. 对
B. 错
【判断题】
低压照明用户受电端电压的波动幅度不应超过额定电压的(±( 5%至 10%))。
A. 对
B. 错
【判断题】
在操作隔离开关时 , 发生带负荷误合隔离开关时 , 已经发生弧光即应(宁错不返 , 一合到底)。
A. 对
B. 错
【判断题】
带有储能装置的操作机构在有危及人身和设备安全的紧急情况下可采取紧急措施进行(分闸)。
A. 对
B. 错
【判断题】
用电烙铁焊接时 , 但焊头因氧化而不吃锡时 , 不可(硬烧)。
A. 对
B. 错
【判断题】
我国规定的安全电压额定值等级为( 42V、36V、24V、12V 和 6V)。
A. 对
B. 错
【判断题】
电气设备的绝缘是一个重要的技术指标 , 是安全检查的重要内容 , 电气绝缘检查主要是检查绝缘是否老化破损, 受潮和(绝缘电阻)等。
A. 对
B. 错
【判断题】
按照能量守恒定律,变压器绕组电压高的一侧,电流(小)。
A. 对
B. 错
【判断题】
填写工作票时要字体规范,字迹清楚不得涂改和不得用(铅)笔填写。
A. 对
B. 错
【判断题】
二次回路交流耐压试验电压为 1000V。当回路绝缘电阻值在 10 兆欧以上时,可采用( 2500) V 摇表代替, 试验持续时间为 1min
A. 对
B. 错
【判断题】
用数字万用表的直流电压档测量直流电压时极性接反,则(测出的电压值需取反才是真正电压值)
A. 对
B. 错
【判断题】
万用表测量电阻时,如果被测电阻未接入,则指针指示(∞位)
A. 对
B. 错
【判断题】
操作票填写中,合上或拉开的隔离开关、刀开关统称为(刀闸)
A. 对
B. 错
【判断题】
改变变压器分接开关的位置时,应来回多操作几次, 目的是保证(分接开关接触良好)
A. 对
B. 错
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变压器吸潮器内的硅胶吸潮后变为(淡红色)
A. 对
B. 错
【判断题】
运行中的电压互感器相当于一个(空载运行)的变压器
A. 对
B. 错
【判断题】
110kV 及以上的供电系统的接地方式一般采用(大电流)接地方式
A. 对
B. 错
【判断题】
消弧线圈对接地电容电流采用全补偿会引起(串联谐振过电压)
A. 对
B. 错
【判断题】
对于 10kV 的变电所,要求电压互感器组采用( V,V)接线
A. 对
B. 错
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正常情况下,氧化锌避雷器内部(通过泄露电流)
A. 对
B. 错
【判断题】
从降压变电站吧把电力送到配电变压器或将配电变压器的电力送到用电单位的线路都属于(配电)线路
A. 对
B. 错
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架空电力线路的绝缘子定期清扫每(一年)进行一次
A. 对
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人工急救胸外挤压法应以每分钟约( 100)次的频率有节奏均匀的挤压,挤压与防松的时间相当
A. 对
B. 错
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触电急救,首先要使触电者迅速(脱离电源)
A. 对
B. 错
【判断题】
接闪网和接闪带等可用圆钢制作,圆钢的直径不得小于( 8)mm
A. 对
B. 错
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断路器的分闸回路串接其自身的(常开)触点
A. 对
B. 错
【判断题】
箱式变电站的强迫通风措施以变压器内上层油温不超过( 65)℃为动作整定值
A. 对
B. 错
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Within an 802. 1x-enabled network with the auth Fail feature configured, when does a switch port get placed into a restricted VLAN?___
A. When a conected client fails to authenticate after a certain number of attempts.
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what improvement does EAP-FASTv2 provide over EAP-FAST? ___
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【单选题】
When users login to the Client less Ssl Vpn using https://209.165.201.2/test ,which group policy will be applied?___
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Which user authentication method is used when users login to the Clientless SSLVPN portal using https://209.165.201.2/test?___
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【单选题】
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【单选题】
Which statement about the communication between interfaces on the same security level is true?___
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Which product can be used to provide application layer protection for tcp port 25 traffic?___
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which iPS mode is less secure than other options but allows optimal network through put ?___
A. inline mode
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【单选题】
Which feature of the Cisco Email security Appliance can mitigate the impact of snowshoe spam and sophisticated phishing attack?___
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【单选题】
Which quantifiable item should you consider when you organization adopts new technologies?___
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【单选题】
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【单选题】
Which ports must be open between a aaa server and a microsoft server to permit Active Directory authentications?___
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B. 888 and 3389
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【单选题】
Refer to the exhibit for which reason is the tunnel unable to pass traffic___
A. the tunnel is failing to receive traffic from the remote peer
B. the local peer is unable to encrypt the traffic
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【单选题】
Which type of attack can exploit design flaws in the implementation of an application without___
A. DHCP starvation attacks
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C. application DDos flood attacks
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【单选题】
How can you protect CDP from reconnaissance attacks?___
A. Enable dynamic ARP inspection on all untrusted ports.
B. Enable dot1x on all ports that are connected to other switches.
C.
D. isable CDP on ports connected to endpoints.
【单选题】
Which type of attack can exploit design flaws in the implementation of an application without ?___
A. DHCP starvation attacks
B. low-rate dos attacks
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【单选题】
Which option is a key security compone nt of and MDM deployment ?___
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C. using self-signed certificates to validate the server
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【单选题】
Which Firepower Management Center feature detects and block exploits and hack attempts?___
A. Content blocker
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【单选题】
hich description of the nonsecret numbers that are used to start a Diffie- Hellman exchange is ture?___
A. They are preconfigured prime integers.
B. They are large pseudorandom numbers.
C. They are very small numbers chosen from a table of known valuses
D. They are numeric values extracted from ha shed system hostnames
【多选题】
Which two characteristics of an application layer firewall are true?___
A. provides stateful firewal functionality
B. has low processor usage
C. provides protection for multiple applications
D. provides rever se proxy services
E. is immune to URL manipulation
【多选题】
Which two devices are components of the BYOD architectural framework?___
A. Nexus 7010 switch
B. Cisco 3945 Router
C. Identify Services Engine
D. Wireless Access oints
E. Prime Infrastructure
【多选题】
Which two actions can a zone based firewall take when looking at traffic? ___
A. forward
B. inspect
C. drop
D. broadcast
E. filter
【多选题】
n which two situations should you use in-band management?___
A. when management applications need concurrent access to the device
B. when you require administrator access from multiple locations
C. when a network device fails to forward packets
D. when you require ROMMON access
E. when the control plane fails to respond
【多选题】
What are two ways to prevent eavesdropping when you perform device management tasks?___
A. Use an SSH connection.
B. Use SNMPv3
C. Use out-of-band management
D. Use SNMP
E. Use in-band management
【多选题】
Which two features are commonly used CoPP and CPPr to protect the control plane? ___
A. QoS
B. traffic classification
C. access lists
D. policy maps
E. class maps
F. Cisco Express Forwarding
【多选题】
Which four tunne ling prot ocols are enabled in the Dfit GrpPolicy group policy ?___
A. Clientless SSL VPN
B. SSL VPN Client
C. PPTP
D. L2TP/IPsec
E. IPsec IKEv1
F. IPsec IKEv2