【判断题】
(32398)发电车主空气断路器电动不能合闸时，可采用手动临时应急合闸。(1.0分)
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相关试题
【判断题】
(32399)热继电器的双金属片加热方式有三种，其中直接加热式应用最普遍。(1.0分)
【判断题】
(32400)目前所有康明斯发电车的冷却风机自动位时均为85℃启动，65℃停止。(1.0分)
【判断题】
(32401)当DW914主开关已合闸时，扳动其上的操纵手柄可以将主开关分闸。(1.0分)
【判断题】
(32402)发电车运行中，燃油供给管路出现轻度堵塞会造成柴油机游车，重度堵塞会造成柴油机停机。(1.0分)
【判断题】
(32403)发电车运行中，若出现上油箱至燃油滤清器管路堵塞，将随车应急软管从上油箱油阀直接接在燃油滤清器进油口位置。(1.0分)
【判断题】
(32404)冬季外温很低时，发电车运行中出现下油箱燃油析蜡，如果电动燃油泵抽不上油，应该立即改用手动泵抽油。(1.0分)
【判断题】
(32405)发电车燃油泵前面的油路系统漏空气、管路堵塞都有可能使燃油泵抽不上油。(1.0分)
【判断题】
(32406)发电车下油箱加满油后出现溢油，配电屏的报警装置立刻报警。(1.0分)
【判断题】
(32407)发电车上油箱如果泵油过满，会出现报警。(1.0分)
【判断题】
(32408)发电车柴油机的冷却水是柴油机正常工作必不可少的冷却介质，所以对膨胀水箱设置了低水位和高水位报警。(1.0分)
【判断题】
(32409)发电车上油箱是保证所有柴油发电机组正常工作十分重要的组件，所以上油箱设置了低油位和高油位报警。(1.0分)
【判断题】
(32410)发电车的电加热器管电源电压全部采用380V。(1.0分)
【判断题】
(32411)发电车的电加热器是通过接触器控制其接通和断开的。(1.0分)
【判断题】
(32412)发电车运行中，下油箱连通管路渗漏，可以通过外表涂密封胶防止渗漏。(1.0分)
【判断题】
(32413)发电车运行中，下油箱连通管路渗漏，如不及时处理，渗漏处将会越来越大。(1.0分)
【判断题】
(32414)发电车的烟火报警器的探头只有两种，一种是感测火焰和温度的，另一种是感测烟雾的。(1.0分)
【判断题】
(32415)发电车的烟火报警器具有自检、火灾报警、故障报警、消音与复音、记录与显示火警发生时间、自动灭火、时间校准等功能。(1.0分)
【判断题】
(32416)继电器是根据输入信号的变化来接通或断开控制电路，其输入的信号必须是电信号。(1.0分)
【判断题】
(32417)发电车出现绕组温度高一定是出现了扫膛的机械故障。(1.0分)
【判断题】
(32418)发电车出现绕组温度高报警，柴油机会自动停机保护。(1.0分)
【判断题】
(32419)发电车柴油机启动时启动马达不转，一定是启动马达坏了，所以立即更换启动马达。(1.0分)
【判断题】
(32420)发电车康明斯柴油机启动时，如果发现24V启动电压降很大，柴油机因转速低没有达到怠速运转，应立即改用48V转换电源应急启机。(1.0分)
【判断题】
(32421)发电车控制屏上主发电机的电流表可以互换。(1.0分)
【判断题】
(32422)发电车控制屏上24V电流表必须先并联分流电阻，再接到24V电路里。(1.0分)
【判断题】
(32423)当发电车的输出电中，如果出现缺相，电机性负载一定不能正常工作。(1.0分)
【判断题】
(32424)发电车输出电中，如果出现缺相，在全列车的负载中，凡使用220V电源的负载，有的能正常工作，有的不能工作。(1.0分)
【判断题】
(32425)发电车更换主空气断路器时，必须先断电停机。(1.0分)
【判断题】
(32426)发电车主空气断路器上如果积尘，可使发电车主干线的绝缘值降低。(1.0分)
【判断题】
(32427)煤、石油、天然气是能量的来源，但，太阳、风、海潮不是能量的来源。(1.0分)
【判断题】
(32428)发电车柴油发电机组是创造能源的机器。(1.0分)
【判断题】
(32429)润滑脂受到外力时，只要一流动就会变软，但是一旦处于静止时就会变硬。(1.0分)
【判断题】
(32430)润滑脂有很弱的粘附性，在摩擦面上不易保持，其抗水、密封性和抗漏失性突出，可以用在密封性不良的摩擦表面上。(1.0分)
【判断题】
(32431)在规定的条件下加热，达到一定的流动性的温度是润滑脂的一个重要性能指标。(1.0分)
【判断题】
(32432)滴点是润滑脂稠度和软硬程度的衡量指标。(1.0分)
【单选题】
生产经营单位必须依法参加___，为从业人员缴纳保险费。[913000000]
A. 工伤社会保险
B. 养老保险
C. 医疗保险
D. 失业保险
【单选题】
因生产安全事故受到损害的从业人员，除依法享有___外，依照有关民事法律尚有获得赔偿权利的，有权向本单位提出赔偿要求。[912000000]
A. 工伤社会保险
B. 医疗保险
C. 失业保险
D. 养老保险
【单选题】
生产经营单位与从业人员订立的___，应当载明有关保障从业人员劳动安全、防止职业危害的事项，以及依法为从业人员办理工伤社会保险的事项。[932000000]
A. 工资合同
B. 养老保险
C. 劳动合同
D. 失业保险
【单选题】
发现危及从业人员生命安全的情况时，___有权向生产经营单位建议，组织从业人员撤离危险场所，生产经营单位必须立即做出处理。[932000000]
A. 安全生产监督管理部门
B. 工会
C. 劳工组织
D. 工人代表
【单选题】
重大危险源是指长期地或者临时地生产、搬运、使用或者储存危险物品，且危险物品的数量等于或者超过临界量的___。[921000000]
【单选题】
《安全生产法》规定，从业人员发现事故隐患或者其他不安全因素，应当___向现场安全生产管理人员或者本单位负责人报告。[911000000]
A. 在8h内
B. 在4h内
C. 在1h内
D. 立即
推荐试题
【单选题】
which technology cloud be used on top of an MPLS VPN to add confidentiality ？___
A. IPsec
B. 3DES
C. AES
D. SSL
【单选题】
Which term is most closely aligned with the basic purpose of a SIEM solution? ___
A. Non-Repudiation
B. Accountability
C. Causality
D. Repudiation
【单选题】
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？___
A. A SNMP View containing the SNMP managers
B. Routing Filter with the SNMP managers in it applied outbound
C. A standard ACL containing the SNMP managers applied to the SNMP configuration
D. A SNMP Group containing the SNMP managers
【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
B. DHCP snooping
C. BPDU guard
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
B. switchport port-security mac-address sticky
C. switchport port-security violation protect
D. switchport port-security
【单选题】
When you edit an IPS subsignature， what is the effect on the parent signature and the family of subsignatures？___
A. The change applies to the parent signature and the entire family of subsignatures
B. The change applies to the parent signature and the subsignature that you edit
C. The change applies only to subsignatures that are numbered sequentially after the subsignature that you edit
D. Other signatures are unaffected， the change applies only to the subsignature that you dit
【单选题】
Which type of mechanism does Cisco FirePOWER de ploy to protect ag detected moving across other networks？___
A. antivirus scanning
B. policy-based
C. reputation-based
D. signature-based
【单选题】
What action must you take on the ise to blacklist a wired device？___
A. Locate the switch through which the device is connected and push an a cl restricting all access by the device
B. Issue a CoA request for the de vice's mac address to each access switch in the network
C. Revoke the device's certificate so it is unable to authenticate to the network
D. Add the device's MAc address to a list of black listed devices
【单选题】
Which type of firewall can perform deep packet inspection？___
A. packet-filtering firewall
B. stateless firewall
C. application firewall
D. personal firewall
【单选题】
What is the main purpose of Control Plane Policing？___
A. to prevent exhaustion of route-proce ssor resources
B. to organize the egress packet queues
C. to define traffic classes
D. to maintain the policy map
【单选题】
Which attack can be prevented by OSPF authentication？___
A. smurf attack
B. IP spoofing attack
C. denial of service attack
D. buffer overflow attack
【单选题】
What is the best definition of hairpinning？___
A. ingress traffic that traverses the outbound interface on a device
B. traffic that enters one interface on a device and that exits through another interface
C. traffic that enters and exits a device through the same interface
D. traffic that tunnels through a device interface
【单选题】
Which SNMPv3 security level provides authentication using HMAC with MD5， but does not use encryption？___
A. authPriv
B. authNo Priv
C. noAuthNoPriv
D. NoauthPriv
【单选题】
You have implemented a dynamic blacklist， using security intelligence to block illicit network activity. However， the blacklist contains several approved connections that users must access for usiness pur poses. Which action can you take to retain the blacklist while allowing users to access the approve d sites？___
A. Create a whitelist and manually add the approved addresses.
B. Disable the dynamic blacklist and deny the specif ic address on a whitelist while permitting the others
C. Edit the dynamic blacklist to remove the approved addresses
D. Disable the dynamic blacklist and create a static blacklist in its place
【单选题】
When connecting to an external resource,you must change a source IP address to use one IP address from a range of 207.165.201.1 to 207.165.1.30. Which option do you implement ?___
A. dynamic source NAT that uses an IP ad dress as a mapped source
B. static destination NAT that uses a subnet as a real de stination
C. dynamic source NAT that uses a range as a mapped source
D. static destination NAT that uses a subnet as a real source
【单选题】
Refer to the exhibit. 【nat（ins，any）dynamic interface】Which ty pe of NaT is configured on a Cisco ASA？___
A. dynamic NAT
B. source identity NAT
C. dynamic PAT
D. identity twice NAT
【单选题】
Which mitigation technology for web-based threats prevents the removal of confidential data from the network？___
A. CTA
B. DCA
C. AMP
D. DLP
【单选题】
Refer to the exhibit. What is the effect of the given configuration？___
A. It establishes the preshared key for the switch
B. It establishes the preshared key for the firewall.
C. It establishes the preshared key for the Cisco ISE appliance
D. It establishes the preshared key for the router.
【多选题】
What are two major considerations when choosing between a SPAN and a TAP when plementing IPS？___
A. the type of analysis the iS will perform
B. the amount of bandwidth available
C. whether RX and TX signals will use separate ports
D. the way in which media errors will be handled
E. the way in which dropped packets will be handled
【多选题】
What are two direct-to-tower methods for redirecting web traffic to Cisco Cloud Web Security？___
A. third-party proxies
B. Cisco Catalyst platforms
C. Cisco NAC Agent
D. hosted PAC files
E. CiSco ISE
【多选题】
Which three descriptions of RADIUS are true？ ___
A. It uses TCP as its transport protocol.
B. Only the password is encrypted
C. It supports multiple transport protocols
D. It uses UDP as its transport protocol
E. It combines authentication and authorization
F. It separates authentication，authorization，and accounting
【多选题】
Which two configurations can prevent VLAN hopping attack from attackers at VLAN 10？___
A. using switchport trunk native vlan 10 command on trunk ports
B. enabling BPDU guard on all access ports
C. creating VLAN 99 and using switchport trunk native vlan 99 command on trunk ports
D. applying ACl between VLAN
E. using switchport mode access command on all host ports
F. using switchport nonegotiate command on dynamic desirable ports
【多选题】
What are two features of transparent firewall mode ___
A. It conceals the presence of the firewall from attackers
B. It allows some traffic that is blocked in routed mode
C. It enables the aSA to perform as a router.
D. It acts as a routed hop in the network.
E. It is configured by default
【多选题】
Which two models of A sa tend to be used in a data center？___
A. 5555X
B. 5585X
C. ASA service module
D. 5512X
E. 5540
F. 5520
【多选题】
Which two statements about hardware-based encrption are true？___
A. It is widely accessible
B. It is potentially easier to compromise than software-based encryption. It requires minimal configuration
C. It requires minimal configuration
D. It can be implemented without impacting performance
E. It is highly cost-effective
【多选题】
In which two modes can the Cisco We b Security appliance be de ployed？___
A. as a transparent proxy using the Secure Sockets Layer protocol
B. as a transparent proxy using the Web Cache Communication Protocol
C. explicit proxy mode
D. as a transparent proxy using the Hyper Text Transfer Protocol
E. explicit active mode
【单选题】
1．三相刀开关的图形符号与交流接触器的主触点符号是___。
A. 一样的
B. 可以互换
C. 有区别的
D. 没有区别
【单选题】
5．熔断器的作用是___。
A. 短路保护
B. 过载保护
C. 失压保护
D. 零压保护
【单选题】
6．热继电器的作用是___。
A. 短路保护
B. 过载保护
C. 失压保护
D. 零压保护
【单选题】
7．交流接触器的作用是可以___接通和断开负载。
【单选题】
8．三相异步电动机的启停控制线路由电源开关、熔断器、___、热继电器、按钮等组成。
A. 时间继电器
B. 速度继电器
C. 交流接触器
D. 漏电保护器
【单选题】
9．三相异步电动机的启停控制线路中需要有___、过载保护和失压保护功能。
A. 短路保护
B. 超速保护
C. 失磁保护
D. 零速保护
【单选题】
10维修电工以___、安装接线图和平面布置图最为重要。
A. 电气原理图
B. 电气设备图
C. 电气安装图
D. 电气组装图
【单选题】
11．熔断器的额定电压应___线路的工作电压。
A. 远大于
B. 不等于
C. 小于等于
D. 大于等于
【单选题】
12．对于电阻性负载，熔断器熔体的额定电流___线路的工作电流。
A. 远大于
B. 不等于
C. 等于或略大于
D. 等于或略小于
【单选题】
13．对于电动机负载，熔断器熔体的额定电流应选电动机额定电流的___倍。
A. 1~1.5
B. 1.5-2.5
C. 2.0~3.0
D. 2.5~3．5
【单选题】
14．使用快速熔断器时，一般按___来选择。
A. IN=1.03IF
B. IN=1.57IF
C. IN=2.57IF
D. IN=3IF
