【单选题】
[单选题]第1493题：检查运行炉管的主要风险是灼伤，预防措施有___。
A. 打开观火孔，正面观察，严禁正面对着观火孔检查，检查后关观火孔
B. 确认炉膛处于正压状态
C. 确认炉膛处于负压状态，微开观火孔，侧面观察，严禁正面对着观火孔检查，检查后关闭观火孔
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相关试题
【单选题】
[单选题]第1494题:按压力等级区别裂解炉汽包属于___容器。
【单选题】
[单选题]第1495题：安全阀一般每年至少检验___次。
【单选题】
[单选题]第1496题：设备倒空操作的原则是___。
A. 先倒空，后泄压
B. 先泄压，后空
C. 倒空与泄压操作同步进行
【单选题】
[单选题]第1497题:下列选项中造成离心泵流量降低的原因之一是___
【单选题】
[单选題]第1498题ε固体可燃物表面温度超过___时可燃物接触该表面有可能一触即。
【单选题】
[单选题]第1499题：透平压缩机停车后立即盘车的目的是___。
A. 避免转子弯曲变形
B. 加快机体降温
C. 对压缩机进行检查
【单选题】
[单选题]第1500题:结合本单位部门职能分工成立以单位___为领导的应急预案编制作明确编制任务、职责分工制定工作计划。
A. 党政一把手
B. 主要负责人
C. 生产部门领导
【单选题】
［单选题］第1501題：以下___项,属于高毒物品目录。
【单选题】
[单选题］第1502题:可燃气体、液化燈和可燃液体的塔区平台或其他设备的构架平台应设置不少于___个通往地面的梯子。
【单选题】
第1503题:单位或者个人违反《中华人民共和国突发事件应对法》.导致突发事件发生或者危害扩大.给他人人身、财产造成损害的应当依法承担___。
【单选题】
第1504题:火灾中气体燃烧属于___燃烧
【单选题】
第1505题:—氧化碳职业接触限值PC-STELL为___mg/m
【单选题】
[单选题］第1506题：乙烯装置中。___需坚要持定期分析化验油品。
A. 裂解气压缩机
B. 化学品注入泵
C. 乙烯产品输送泵
【单选题】
[单选题］第1507题，为了防止空气倒流至火炬内而发生爆炸事故，以下___)是火炬系统上设置的安全措施。
A. 注入蒸汽
B. 设置分子封
C. 火炬部设置袤汽伴热
【单选题】
［单选題］第1509题:消防给水管道应保持充水状态。地下独立的消防给水管道应埋设在冰冻线以下，管顶距冰冻线不应小于 ___mm。
【单选题】
［单选题］第1511题：防氨和硫化氢的滤毒罐顔色为___。
【单选题】
第1512题：比水轻的非水溶性可燃、易燃液体火灾一原则上不能用___扑救。
【单选题】
第1513题：关于碳二加氢反应器飞温的处理方法，下列说法正确的是___。
A. 降低入口温度
B. 降低氢炔比
C. 反应器立即泄压至火炬
【单选题】
[单选题]第1514题：气瓶充装液化石油气时,应___充装。
【单选题】
[单选题]第1515题：用来防止可燃气体、易燃液体大量泄漏，在容器的出口位置常设置___阀
【单选题】
[单选题]第1516题：急冷锅炉、蒸汽过热炉在化学清洗时应注意___。
A. 人员保护和废液指定地点处理
B. 管线复位后，高压蒸汽管线无需吹扫
C. 化学清洗前要用蒸汽预热
【单选题】
[单选题]第1517题：炼制石油、生产合成氯等装置过程中排放含有硫化物气体的，应当配备___
A. 火炬系统
B. 脱硫装置
C. 直接排放设施
【单选题】
[单选题]第1518题：急冷水乳化的危害很多，那么急冷水乳化液是___。
【单选题】
[单选题]第1519题：能提供对整个面部的高能量飞溅的的保护的是___。
【单选题】
[单选题]第1520题：苯可能引起的职业病包括苯所致白血病、接触性皮炎及___。
A. 肝血管瘤
B. 肺气肿
C. 急性化学性眼灼伤
【单选题】
[单选题]第1521题：防治噪声污染的最根本的措施是___。
A. 减振降噪
B. 采用吸声器
C. 从声源上降低噪声
【单选题】
[单选题]第1522题：要努力形成___体系，确保应对各种事故尤其是重特大且救摄复杂、难度大的生产安全事故应急救援的装置和物资需要。
A. 应急管理体系
B. 应急救摄体系
C. 多层次的应急救援装备和物资储备
【单选题】
[单选题]第1523题：根据《劳动防护用品监督管理规定》.（劳动防护用品目录由国家安全生产监督管理总局确定并公布___
【单选题】
[单选题]第1524题：炸药燃烧与一般可燃物爆炸不同，它不需要___就能进行燃烧。
【单选题】
[单选题]第1525题：裂解炉对流段原料预热盘管破裂后，室内最明显的变化是___。
A. 裂解炉横跨断温度异常上升
B. 裂解炉烟气温度异常上升
C. 裂解炉负压不断降低
【单选题】
[单选题]第1526题：乙烯在工作环境中最高允许浓度为___mg/m2。
【单选题】
[单选题]第1527题：下列选项中不属于急冷油管线防堵措施的是___
A. 控制好QO黏度在指标范围内
B. 定期切换、清理急冷油循环泵进出口过滤器，防止过滤器堵塞
C. 控制汽油分馏塔釜在低液位
【单选题】
[单选题]第1528题：为了保证安全阀能够正常排放物料火炬总管的管径通常由___决定
A. 最大允许组合背压
B. 火炬气的流速
C. 最大火炬排放量
【单选题】
[单选题]第1529题：压力容器作业的职业禁忌证不包括___。
A. 心脏病及心电图明显异常（心律失常)
B. 红绿色盲
C. 恐高症
【单选题】
[单选题]第1530题：根据事故情景，对事故现场进行观票、分析或测定，确定事故严重程度、影响范围和变化趋势等。这在应急演练中属于___。
【单选题】
[单选题]第1531题：干气密封主密封的作用是___。
A. 防止机体内物料外泄
B. 防止润滑油外泄
C. 防止润滑油漏入机体
【单选题】
[单选题]第1532题：个人剂量监测档案应保存___。
【单选题】
[单选题]第1533题：若系统内存在燃爆性气体爆破片的材料不应选用___。
【单选题】
[单选题]第1534题：发生特别重大突发事件对人民生命财产安全、国家安全、公共安全、环损安全或者社会秩序物成重大威胁采取有关法律、法规、规章规定的应急处置措施不能消除或者有效控制、减轻其严重社会危害，需要进入___的.由全国人民代表大会常务委员会或者国务院依照宪法和其他有关法律规定的权限和程序决定。
【单选题】
[单选题]第1535题：压力容器内的压力由于容器内部或外部受热而显著增加且容器与其它设备的连接管道又装有截止阀应单独装设___。
推荐试题
【单选题】
How is management traffic isolated on a Cisco ASR 1002？___
A. Traffic isolation is done on the vlan level
B. There is no management traffic isolation on a Cisco ASR 1002
C. Traffic is isolated based upon how you configure routing on the device
D. The management interface is configured in a special vRF that provides traffic isolation from the default routing table
【单选题】
Which statement about NaT table evaluation in the asa is true？___
A. After-auto NAT polices are appl d first
B. Manual NAT policies are applied first
C. the asa uses the most specific match
D. Auto NAT policies are applied first
【单选题】
Which information can you display by executing the show crypto ipsec sa command？___
A. ISAKMP SAs that are established between two peers
B. recent changes to the IP address of a peer router
C. proxy infor mation for the connection between two peers
D. IPsec SAs established between two peers
【单选题】
How can you prevent NAT rules from sending traffic to incorrect interfaces？___
A. Assign the output interface in the NAT statement
B. Add the no-proxy-arp command to the nat line.
C. Configure twice NAT instead o bject NAT. 5
D. Use packet-tracer rules to reroute misrouted NAT entries.
【单选题】
What term can be defined as the securing， control， and identification of digital data？___
A. cryptography
B. crypto key
C. cryptoanalysis
D. cryptology
【单选题】
Which feature in the dNS security module provide on and off network DNS protection？___
A. Data Loss Prevention
B. Umbrella
C. Real-time sandboxing
D. Layer-4 monitoring
【单选题】
Which a dverse consequence can occur on a network without BPDu guard ?___
A. The olde st switch can be elected as the root bridge
B. Unauthorized switches that are connected to the network can cause spanning-tree loops
C.
D. ouble tagging can cause the switches to experience CAM table overload.
【单选题】
What configuration is required for multitenancy ?___
A. shared infrastructure
B. multiple carriers
C. co-located resources
D. multiple separate zones
【单选题】
Why does ISE require its own certificate issued by a trusted CA？___
A. ISEs certificate allows guest devices to validate it as a trusted network device
B. It generates certificates for guest devices ba sed on its own certificate
C. It requests certificates for guest devices from the Ca server based on its own certificate.
D. ISE's certificate allows it to join the network security framework
【单选题】
which attack involves large numbers of ICMP packets with a spoofed source IP address？___
A. smurf attack
B. Teardrop attack
C. Nuke attack
D. SYN Flood attack
【单选题】
Which statement about interface and global access rules is true？___
A. Interface access rules are processed before global access rules.
B. Global access rules apply only to outbound traffic， but interface access rules can be applied in either direction
C. The implicit allow is proce ssed after both the global and interface access rules
D. If an interface access rule is applied， the global access rule is ignored
【单选题】
Which type of malicious software can create a back-door into a device or network？___
A. bot
B. worm
C. virus
D. Trojan
【单选题】
Which security term refers to the like lihood that a weakness will be exploited to cause damage to an asset？___
A. threat
B. risk
C. countermeasure
D. vulnerability
【单选题】
Which IPS detection method examines network traffic for preconfigured patterns？___
A. signature-based detection
B. honey-pot detection
C. anomaly-based detection
D. policy-based detection
【单选题】
What is an advantage of split tunneling ？___
A. It allows users with a VpN connection to a corporate network to access the internet with sending traffic across the cor porate network.
B. It allows users with a vpn connection to a corporate network to access the internet by using the vPN for security.
C. It protects traffic on the private network from users on the public network
D. It enables the VPN server to filter traffic more efficiently
【单选题】
Which IDS/IPS state misidentifies acceptable behavior as an attack ？___
A. false negative
B. true positive NEKA G
C. true negative
D. false positive
【单选题】
What is the maximum num ber of methods that a single method list can contain？___
【单选题】
Which command enables authentication at the oSPFv2 routing process level？___
A. ip ospf authentication message-digest
B. area 0 authentication message-digest
C. ip ospf message-digest-key 1 mds Cisco
D. area 0 authentication ipsec spi 500 md5 1234567890ABCDEF1234567890ABCDEF
【单选题】
Which type of firewall monitors a nd protects a specific system？___
A. firewall
B. application firewall
C. stateless firewall wvp
D. personal firewall
【单选题】
On an ASA， which maps are used to identify traffic？___
A. Route maps
B. Policy maps
C. Class maps
D. Service maps
【单选题】
Which type of social engineering attack targets top executives？___
A. whaling
B. vishin
C. spear phishing ng
D. baiting
【单选题】
What is the minimum Cisco lOS version that supports zone-based firewalls？___
A. 12.1T
B. 15.1
C. 15.0
D. 124
【单选题】
In which type of attack does an attacker overwrite an entry in the CAM table to divert traffic destined to a legitimate host？___
A. DHCP spoofing
B. ARP spoofing
C. CAM table overflow
D. MAC spoofing
【多选题】
Which two attack types can be prevented with the impleme ntation of a Cisco IPS solution？___
A. DDos
B. man-in-the-middle
C. worms
D. ARP spoofing
E. VLAN hopping
【多选题】
choose four___
A. DHCP snooping ——————————blocks DHCP messages
B. Dynamic ARP inspection——————verifies IP-to-MAC traffic on untrusted ports
C. IP sources guard ——————————provides layer 2 interface security with ports ACLs
D. Port security————————————mitigates MAC-address spoofing at the access interface
【多选题】
choose four___
A. Step1————————run the system setup wizard
B. Step2————————add an authentication realm
C. Step3————————configure identity management
D. Step4————————configure directory group
【多选题】
What are two advanced features of the Cisco AMp solution for endpoints ___
A. contemplation
B. foresight
C. sandboxing
D. reputation
E. reflection
【多选题】
Which two characteristics of RADIUS are true？___
A. It encrypts only the password between user and server.
B. It uses TCP ports 1812/1813
C. It uses UDP ports 1812/1813.
D. It uses UDP port 49
E. It uses TCP port 49
【多选题】
What are two challenges of using a network-based IPS？ ___
A. It is unable to determine whether a detected attack was successful
B. It requires additional storage and proce ssor capacity on syslog servers
C. As the network expands， it requires you to add more sensors.
D. It is unable to detect attacks across the entire network
E. It must support multiple operating systems.
【多选题】
What are two default be haviors of the traffic on a zone-based firewall？___
A. Traffic within the self -zone uses an im plicit deny all.
B. All traffic between zones is implicitly blocked
C. Communication is allowed between interfadAss that are members of the same zone
D. Communication is blocked between interfaces that are members of the same zone
E. The CBAC rules that are configured on router interfaces apply to zone interfaces
【多选题】
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
B. The on-premise model is more scalable than the cloud-based model
C. The on-premise model is generally less expensive than the cloud-based model
D. The on-premise model generally has less latency than the cloud- based model.
E. The on-premise model provides more control of the MDM solution than the cloud
【多选题】
Which two actions can an end usts take to manage a lost or stolen device in Cisco ISE？ ___
A. Activate Cisco ISE End point Protection Services to quarantine the device.
B. Add the mac address of the device to a list of blacklisted devices
C. Force the device to be locked with a PIN
D. Request revocation of the digital certificate of the device.
E. Reinstate a device that the user previously marked as lost or stolen
【多选题】
Which two problems can arise when a proxy firewall serves as the gateway between networks？___
A. It can prevent content caching
B. It can limit application support
C. It is unable to prevent direct connections to other networks
D. It can cause reduced throughput.
E. It is unable to provide antivirus protection
【多选题】
When using the Adaptive Security Device Manager（ASDM）， which two methods are available to add a new root certificate？___
A. Use sCep
B. Install from SFTP server
C. Install from a file
D. Use Https
E. Use LDAP
【多选题】
Which two are considered basic security principles？___
A. Accountability
B. Redundancy
C. High Availabilit
D. Integrity
E. Confidentiality
【多选题】
Which two roles of the Cisco WSA are true？___
A. IPS
B. firewall
C. antispam
D. web proxy
E. URL filter
【单选题】
Which next-generation encryption algorithm supports four variants？___
A. SHA-2
B. SHA-1
C. MD5
D. HMAC
【单选题】
What aims to remove the abil ity to deny an action？___
A. Non-Repudiation
B. Accountability
C. Integrity
D. Deniability
【单选题】
Which statements about the native VLAN is true ？___
A. It is susceptible to VLAN hopping attacks.
B. It is the Cisco recommended VLAN for switch-management traffic
C. It is most secure when it is a ssigned to vLAn 1.
D. It is the cisco-recomme nded vlan for user traffic
【单选题】
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？___
