【单选题】
消防轻型安全绳最小破断强度不应小于40 KN。___(易)
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相关试题
【单选题】
消防通用安全绳不小于20KN。___(易)
【单选题】
消防轻型安全绳的主要用于现场救人、自救、携带器材和疏散物质四个方面。___(易)
【单选题】
绳索受到污染后,要用软毛刷刷洗干净,在阳光下曝晒。___(易)
【单选题】
如果安全绳索受到冲撞、砸、刮、尖锐物切割等情况时可以继续使用,不用更换新的绳索。___(易)
【单选题】
消防轻型安全绳的直径不小于9.5mm且不大于12.5mm。___(易)
【单选题】
处置面粉加工厂火灾时,因面粉不是危险物品中,可不使用防爆手持电台。___(难)
【单选题】
使用手持电台通话时,为保证通话音量,话筒离嘴越近越好。___(中)
【单选题】
手持电台进水后,立即关机并拆除电池,尽快送修。___(中)
【单选题】
电台的呼号通常用数字表达,其中2读作“两”。___(易)
【单选题】
BC干粉灭火器不能扑救固体有机物质的火灾。___(难)
【单选题】
储压式灭火器压力指示器的指针指向红区时,表明压力不足,不能使用。___(易)
【单选题】
对于可燃固体粉尘的火灾,只能用喷雾水扑救;如用直流水,则可能把燃烧物冲散,形成爆炸混合物,有发生粉尘爆炸的危险。___(中)
【单选题】
室内消火栓只限于消防专业人员使用,其他人不得使用。___(易)
【单选题】
地上式消火栓应有1个DN150或DN100和2个DN65的栓口。___(易)
【单选题】
开启室外消火栓时,应按逆时针方向旋转打开。___(易)
【单选题】
每个低压消火栓通常只供一辆消防车用水,常出两支水枪。___(易)
【单选题】
低压消火栓的保护半径为150m。___(易)
【单选题】
低压消火栓的布置间距不应超过120m。___(易)
【单选题】
高压消火栓。由于系统压力较高,可直接接出水带、水枪实施灭火,而不需要消防车或其他移动式消防水泵再加压。___(易)
【单选题】
水泵接合器和室外消火栓的功用是一样的,都可以直接取水用于灭火。___(易)
【单选题】
水泵接合器应设置在便于消防车使用的地点,并不妨碍交通。___(易)
【单选题】
开展烟热环境模拟训练时,烟热室温度控制在55~60℃。___(难)
【单选题】
开展真火模拟训练时,不得摘下面罩。___(易)
【单选题】
射水方法包括立式射水方法、跪式射水方法、卧式射水方法、肩式射水方法四种。___(易)
【单选题】
卧式射水姿势省力,便于隐蔽,防止爆炸伤人,缺点是水枪移动不灵活。___(中)
【单选题】
多功能水枪可进行喷雾、开花直流、双开花、大口径射流形状的变换。___(中)
【单选题】
6米拉梯有木质、竹质和生铁材质三种。___(易)
【单选题】
6米拉梯有木质、竹质和铝合金材质三种。___(易)
【单选题】
6米拉梯使用时必须由两人操作。___(易)
【单选题】
型号为TG41的挂钩梯,工作长度为4.1米。___(中)
【单选题】
单杠梯侧板两端包有铁皮,可用来撞击建筑结构。___(中)
【单选题】
水带铺设时如通过铁路,水带应铺设水带护桥。___(中)
【单选题】
水带附件包括水带包布、挂钩、护桥等。___(易)
【单选题】
低压水枪,工作压力范围为0.2~1.6MPa。___(中)
【单选题】
在各种水枪中,直流水枪喷射距离最远。___(中)
【单选题】
多功能水枪具有直流、喷雾、自卫水幕和关闭等功能。___(中)
【单选题】
消防水枪通过水射流形式的选择进行灭火、冷却保护、隔离和排烟等多种消防作业。___(易)
【单选题】
当水枪采用喷雾射流时,可进行排烟作业。___(易)
推荐试题
【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
【单选题】
15.断路器中过电流脱扣器的额定电流应该大于等于线路的___。
A. 最大允许电流
B. 最大过载电流
C. 最大负载电流
D. 最大短路电流
【单选题】
16.短路电流很大的电气线路中宜选用___断路器。
A. 塑壳式
B. 限流型
C. 框架式
D. 直流快速
【单选题】
17.一般电气控制系统中宜选用___断路器。
A. 塑壳式
B. 限流型
C. 框架式
D. 直流快速
【单选题】
18.交流接触器一般用于控制___的负载。
A. 弱电
B. 无线电
C. 直流电
D. 交流电