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【判断题】
据部分省市统计,农村触电事故要少于城市的触电事故。
A. 对
B. 错
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答案
B
解析
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验电是保证电气作业安全的技术措施之一。
A. 对
B. 错
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雷电可通过其它带电体或直接对人体放电,使人的身体遭到巨大的破坏直至死亡。
A. 对
B. 错
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交流接触器常见的额定最高工作电压达到6000V。
A. 对
B. 错
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摇测大容量设备吸收比是测量(60秒)时的绝缘电阻与(15秒)时的绝缘电阻之比。
A. 对
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二极管只要工作在反向击穿区,一定会被击穿。
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电解电容器的电工符号如图所示。
A. 对
B. 错
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电工应做好用电人员在特殊场所作业的监护作业。
A. 对
B. 错
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电子镇流器的功率因数高于电感式镇流器。
A. 对
B. 错
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吊灯安装在桌子上方时,与桌子的垂直距离不少于1.5m。
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不同电压的插座应有明显区别。
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危险场所室内的吊灯与地面距离不少于3m。
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移动电气设备电源应采用高强度铜芯橡皮护套硬绝缘电缆。
A. 对
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电工钳、电工刀、螺丝刀是常用电工基本工具。
A. 对
B. 错
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带电机的设备,在电机通电前要检查电机的辅助设备和安装底座,接地等,正常后再通电使用。
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电动机按铭牌数值工作时,短时运行的定额工作制用S2表示。
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电气控制系统图包括电气原理图和电气安装图。
A. 对
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改革开放前我国强调以铝代铜作导线,以减轻导线的重量。
A. 对
B. 错
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在安全色标中用绿色表示安全、通过、允许、工作。
A. 对
B. 错
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为了避免静电火花造成爆炸事故,凡在加工运输,储存等各种易燃液体、气体时,设备都要分别隔离。
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防雷装置应沿建筑物的外墙敷设,并经最短途径接地,如有特殊要求可以暗设。
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按钮的文字符号为SB。
A. 对
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接触器的文字符号为FR。
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用钳表测量电流时,尽量将导线置于钳口铁芯中间,以减少测量误差。
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B. 错
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电流表的内阻越小越好。
A. 对
B. 错
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右手定则是判定直导体作切割磁力线运动时所产生的感生电流方向。
A. 对
B. 错
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规定小磁针的北极所指的方向是磁力线的方向。
A. 对
B. 错
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触电分为电击和电伤。
A. 对
B. 错
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断路器在选用时,要求断路器的额定通断能力要大于或等于被保护线路中可能出现的最大负载电流。
A. 对
B. 错
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电动式时间继电器的延时时间不受电源电压波动及环境温度变化的影响。
A. 对
B. 错
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刀开关在作隔离开关选用时,要求刀开关的额定电流要大于或等于线路实际的故障电流。
A. 对
B. 错
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组合开关可直接起动5KW以下的电动机。
A. 对
B. 错
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电动势的正方向规定为从低电位指向高电位,所以测量时电压表应正极接电源负极、而电压表负极接电源的正极。
A. 对
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接地电阻测试仪就是测量线路的绝缘电阻的仪器。
A. 对
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在串联电路中,电流处处相等。
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并联电路的总电压等于各支路电压之和。
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磁力线是一种闭合曲线。
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What configuration is required for multitenancy ?___
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Which security term refers to the like lihood that a weakness will be exploited to cause damage to an asset?___
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What is an advantage of split tunneling ?___
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In which type of attack does an attacker overwrite an entry in the CAM table to divert traffic destined to a legitimate host?___
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choose four___
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choose four___
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Which two characteristics of RADIUS are true?___
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【多选题】
What are two challenges of using a network-based IPS? ___
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What are two default be haviors of the traffic on a zone-based firewall?___
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Which two advantages does the on-premise model for MDM deployment have over the cloud-based model?___
A. The on-premise model is easier and faster to de ploy than the cloud-based model
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【多选题】
Which two actions can an end usts take to manage a lost or stolen device in Cisco ISE? ___
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Which two problems can arise when a proxy firewall serves as the gateway between networks?___
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When using the Adaptive Security Device Manager(ASDM), which two methods are available to add a new root certificate?___
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【多选题】
Which two are considered basic security principles?___
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Which two roles of the Cisco WSA are true?___
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Which next-generation encryption algorithm supports four variants?___
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What aims to remove the abil ity to deny an action?___
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Which statements about the native VLAN is true ?___
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There are two versions of IKE:IKEv1 and IKEv2. Both IKEv1 and IKEv2 protocols operate in phases IKEv1 operates in two phases. IKEv2 operates in how many phases?___
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What does the dh group refer to?___
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Which path do you follow to enable aaa through the SDM ?___
A. Configure Tasks > AAA
B. Configure > Addition Authentication > AAA
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which technology cloud be used on top of an MPLS VPN to add confidentiality ?___
A. IPsec
B. 3DES
C. AES
D. SSL
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Which term is most closely aligned with the basic purpose of a SIEM solution? ___
A. Non-Repudiation
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You have just deployed SNMPv3 in your environment, Your manager asks you to make sure that our SNMP agents can only talk to the SNMP Manager. What would you configure on your SNMI agents to satisfy this request?___
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【单选题】
Which feature prevents loops by moving a nontrunking port into an errdisable state when a BPDU is received on that port?___
A. BPDU filte
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D. Port Fast
【单选题】
Which command enables port security to use sticky MAC addresses on a switch?___
A. switchport port-security violation restrict
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