【单选题】
[132]从事一般性高处作业脚上应穿___
A. 硬底鞋
B. 软底防滑鞋
C. 普通胶鞋
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答案
B
解析
暂无解析
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【单选题】
[133]室温高于摄氏___度,相对湿度超过( )的作业场所,称为高温作业场所。
A. 30℃,80%
B. 35℃,80%
C. 30℃,85%
D. 35℃,85%
【单选题】
[134]离心式压缩机的平衡鼓设在___
A. 压缩机入口端
B. 压缩机排出端
【单选题】
[135]裂解气压缩机透平一、二级喷射泵投用顺序是___
A. 先投二级再投一级
B. 先投一级再投二级
C. 一起投用
D. 只投一级
【单选题】
[136]三机的润滑油压力联锁值是___
A. 200KPa
B. 60KPa
C. 120KPa
D. 80KPa
【单选题】
[137]三机系统联锁试验有哪些项目___
A. LO、GO低值自启动
B. LO超低值联锁停车
C. GO超低值联锁停车
D. A、B
【单选题】
[138]对于乙烯三大机组,为了防止___起动油路系统时,机体内必须充压。
A. 机油串入机壳
B. 系统抽真空
C. 压缩机喘振
D. 防止油路压力低
【单选题】
[139]乙烯机开车时,怎样保持致冷系统所需负荷___。
A. 投用冷户
B. 不投用冷户
C. 投用一半冷户
D. 投用三分之二
【单选题】
[140]下列设备中,输送气体设备为___。
A. 离心泵
B. 隔膜泵
C. 螺杆泵
D. 真空泵
【单选题】
[141]离心式压缩机若入口压力相同,则___。
A. 密度大的气体可产生较高的最终压力
B. 密度大的气体可产生较低的最终压力
C. 密度与最终压力无关
D. 最终压力只与温度有关
【单选题】
[142]冻塔与液泛的主要区别___。
A. 冻塔时塔压差增大,液泛时压差不变。
B. 冻塔与液泛时塔压差都增大,但冻塔时塔内温度不变。
C. 冻塔与液泛时塔压差都增大,但冻塔时加大塔顶采出减少回流量和降低釜温等.
D. 措施后,压差仍不降低。
【单选题】
[143]油过滤器压差达___MPa时,压差高报。
A. 0.5
B. 0.1
C. 0.15
D. 0.2
【单选题】
[144]裂解气压缩机小透平暖机方式为___。
A. 半弧暖机
B. 全弧暖机
C. 背压暖机
D. 抽汽暖机
【单选题】
[145]复水泵不上量的可能原因是___。
A. 泵入口过滤网堵
B. 真空度过高
C. 复水温度高
D. 复水器液位高
【单选题】
[146]关于装置吹扫,下列说法正确的是___。
A. 孔板流量计可吹扫
B. 管线旁路必须吹扫
C. 调节阀可作为吹扫气源控制阀
D. 调节阀也可以吹扫
【单选题】
[147]低压脱丙烷塔塔顶冷剂采用___。
A. 乙烯冷剂
B. 丙烯冷剂
C. 冷却水
D. 甲烷冷剂
【单选题】
[148]乙烯塔中间再沸器位号为___。
A. E-409
B. E-409A/B
C. E-409A/S
D. E-409A/B/S
【单选题】
[149]乙烯塔底再沸器位号为___。
A. E-410
B. E-410A/B
C. E-410A/S
D. E-410A/B/S
【单选题】
[150]高压脱丙烷塔塔釜出料去向为___。
A. 脱丁烷塔
B. 低压脱丙烷塔上部
C. 低压脱丙烷中部
D. 碳三加氢反应器
【单选题】
[151]主蒸汽管道的疏水器是起___作用的。
A. 起到缓冲作用
B. 分离蒸汽中所带的水分
C. 容纳蒸汽凝液
D. 放空
【单选题】
[152]压缩机开车时,下列说法正确的是___。
A. 先投润滑油,再投密封气
B. 先投密封气,再投润滑油
C. 投润滑油后不需投密封气
D. 具备条件即可,二者没有先后顺序
【单选题】
[153]乙烯制冷压缩机开车前,系统N2干燥合格,露点应是___。
A. ≤-50℃
B. ≤-65℃
C. ≤-40℃
D. ≤-20℃
【单选题】
[154]干燥作业过程中,干燥合格的要求是___。
A. 只要分析一个采样点露点合格
B. 要分析两个采样点露点合格
C. 分析三个采样点露点合格
D. 所有采样点露点必须合格
【单选题】
[155]裂解气压缩机“三返一”的返回点为___。
A. 二段吸入罐前
B. 一段吸入罐后
C. 一段吸入罐前
D. 裂解气进料电磁阀前
【单选题】
[156]裂解气压缩机机体导液的基本原则是___。
A. 从高压到低压,开一个关一个
B. 从高压到低压,关一个开一个
C. 从低压到高压,关一个开一个
D. 从低压到高压,开一个关一个
【单选题】
[157]催化剂通工业风氧化时,排出的尾气去往___。
A. 大气
B. 裂解炉炉膛
C. CFL
D. HFL
【单选题】
[158]丙烯制冷压缩机四段出口的过热丙烯气经过冷凝器冷凝后进入___。
A. 四段吸入罐
B. 蒸发器
C. 丙烯冷剂收集罐
D. 各级用户
【单选题】
[159]装置吹扫合格标准是指___。
A. 目视排气清净
B. 手摸无脏
C. 在排气口用白布打靶检查五分钟内无任何脏物
D. 涂有白铅油的靶板打靶一分钟无任何脏物
【单选题】
[160]装置干燥最终所达露点取决于___。
A. 干燥气体的种类
B. 干燥气体的露点
C. 干燥时间的长短
D. 干燥气体的密度
【单选题】
[161]裂解气压缩机紧急停车后,需要打开___。
A. 主汽阀
B. 调速阀
C. 抽汽止逆阀
D. 透平去消音器阀门
【单选题】
[162]裂解气压缩机喷入洗油的目的是___。
A. 润滑轴承
B. 降温防爆作用
C. 防止裂解气外窜
D. 防止重烃高温下在叶轮流道间聚合结焦
【单选题】
[163]压缩机每段吸入罐罐顶都设有除沫器的目的是___。
A. 使气体中的液体汽化
B. 除去气体中的不凝气
C. 除去气体中的氧气
D. 除去气体中的微小液滴
【单选题】
[164]碱洗塔使用的药剂有黄油抑制剂,注入位置是___循环泵入口。
A. 弱碱和中碱
B. 弱碱和强碱
C. 中碱和强碱
D. 只有强碱泵
【单选题】
[165]裂解气压缩机开车前,外引密封气为___。
A. 裂解气
B. 乙烯
C. 丙烯
D. 氮气
【单选题】
[166]乙烯装置使用氮气纯度为___。
A. 90.0%(体)
B. 95%(体)
C. 99.5%(体)
D. 99.95%(体)
【单选题】
[167]工业上常用什么表示含水气体的水含量___。
A. 百分比
B. 密度
C. 摩尔比
D. 露点
【多选题】
[1]复水器液面过高处理方法正确的有___
A. 加大抽汽量,减少复水量
B. 就地排放
C. 用手轮控制,联系仪表人员修理
D. 关SC补水阀
【多选题】
[2]可以作为裂解气压缩机密封气体有___
A. 空气
B. 乙烯
C. 干燥器出口裂解气
【多选题】
[3]乙烯装置常用垫片___
A. 非金属垫片
B. 缠绕垫片
C. 金属包垫片
D. 特种垫片
【多选题】
[4]泵的机械密封的密封点是___
A. 静环和压盖之间
B. 静环与动环间
C. 动环和轴或轴套间
D. 泵体与压盖之间
【多选题】
[5]乙烯制冷压缩机开车时先充压后引液的目的是___
A. 防止设备冷淬
B. 加快开车速度
C. 节省乙烯冷剂
推荐试题
【单选题】
What is the highest security level that can be configured for an interface on an ASA?___
A. 0
B. 50
C. 10
D. 200
【单选题】
Which term refers to the electromagnetic interference that can radiate from network cables?___
A. Gaussian distributions
B. Doppler waves
C. emanations
D. multimode distortion
【单选题】
How does a zone pair handle traffic if the policy de fination of the zone pair is missing?___
A. It inspects all traffic.
B. It drops all traffic.
C. It permits all traffic wihtout logging
D. It permits and logs all traffic
【单选题】
default how does a zone based firewall handle traffic to add from the self zone?___
A. It permits all traffic without inspection
B. It inspects all traffic to determine how it is handled
C. It permits all traffic after inspection
D. It frops all traffic
【单选题】
Which command should beused to ena ble AAA Authentication to determine if a user can access the privilege command level?___
A. aaa authentication enable local
B. aaa authentication enable level=
C. aaa authentication enable method de fault
D. aaa authentication enable defa ult local
【单选题】
On an ASA, the policy indicates that traffic should not be translated is often referred to as which of the following?___
A. NAT zero
B. NAT forward
C. NAT nul
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【单选题】
Which protocol offers data Integrity encryption, authentication, and anti-replay functions for IPSec VPN?___
A. ESP protocol
B. IKEv3 Protocol
C. AH protoco
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【单选题】
Which component offers a variety of security Solution, including firwall, IF Antivirus and antiphishing features?___
A. Cisco loS router
B. Cisco ASA 5500 Ser ies security appliance
C. Cisco ASA 5500 X series Next Gen Security appliance
D. Cisco 4200 series IPS appliance
【单选题】
Refer to the exhibit, A Network Secur ity administrator check the ASa firewall NAT policy table rith show nat command, which statement is fails?___
A. There are only reverse translation matches for the REAL SERvER object
B. First policy in the Section 1 is a dynamic nat entry defined in the object configuration
C. NAT policy in section 2 is static entry de fined in the object configuration
D. Translation in Section 3 used when a connection does not matches any entries in first two sections
【单选题】
What is true of an aSa in transparent mode ?___
A. It supports OSPF
B. It requires an IP address for each interface
C. It requires a management IP address
D. It allows the use of dynamic NaT
【单选题】
What is the effect of the ip scp server enable command?___
A. It references an access list that allows specific SCP servers
B. It allows the router to initiate requests to an SCP server
C. It allows the router to become an SCP server
D. It adds SCP to the list of allowed copy functions
【单选题】
How can you mitigate attacks in which the attacker attaches more than one vLan tag to a packet?___
A. Assign an access VLAN to every active port on the switch
B. Disable Ether Channel on the switch
C. Explicitly identity each VLAN allowed across the trunk
D.
E. nable transparent VTP on the switch
【单选题】
Which technology can you implement to centrally mitigate potential threats when users on your network download files that might be malicious?___
A. Enable file-reputation services to inspect all files that traverse the company network and block files with low reputation scores
B. Verify that the compa ny IpS blocks all known malicious website
C. Verity that antivirus software is installed and up to date for all users on your network
D. Implement URL filtering on the perimeter firewall
【单选题】
What is the most common implementation of PaT in a standard networked environment?___
A. configuring multiple external hosts to join the self zo ne and to communicate with one another
B. configuring multiple internal hosts to communicate outside of the network using the outside interface IP address
C. configuring multiple internal hosts to communicate outside of the network by using the inside interface IP address
D. configuring an any any rule to enable external hosts to communicate inside the network
【单选题】
Which component of a bYod architecture provides aAa services for endpoint access ?___
A. Integrated Services Router
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C. ASA
D. Identity Services
E. ngine
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You are configuring a NAT rule on a Cisco ASA ,Which description of a mapped interface is true?___
A. It is mandatory for all firewall modes
B. It is optional in routed mode
C. It is optional in transparent mode
D. It is mandatory for ide ntity NAT only
【单选题】
Which description of the use of a private key is true ?___
A. The sender signs a message using the receivers private key
B. The sender signs a message using their private key
C. The sender encrypts a message using the receivers private key
D. The receiver decrypts a n15ssage using the sender's private key
【单选题】
Which mechanism does the FireAMP Connector use to avoid conflicts with other security applications such as antivirus products ?___
A. Virtualization
B. Containers
C. Sandboxing
D.
E. xclusions
【单选题】
Which network to pology de scribes multiple LANS in a gec? ___
A. SOHO
B. MAN
C. pan
D. CAN
【单选题】
Which statement represents a difference between an access list on an aSa versus an access list on a router?___
A. The asa does not support number access lists
B. The aSa does not support standard access list
C. The asa does not ever use a wildcard mask
D. The asa does not support extended access lists
【单选题】
Which command do you enter to verify the status and settings of an iKE Phase 1 tunnel?___
A. show crypto ipsec as output
B. show crypto isakmp
C. show crypto isakmp policy
D. show crypto ipsec transform
【单选题】
Which feature can help a router or switch maintain packet forwarding and protocol states despite an attack or heavy traffic load on the router or switch?___
A. service Policy
B. Control Plane Policing
C. Policy Map
D. Cisco
E. xpress
F. orwarding
【单选题】
Which STP feature can prevent an attacker from becoming the root bridge by immediately shutting down the interface when it receives a BPDU?___
A. root guard
B. Port Fast
C. BPDU guard
D. BPDU filtering
【单选题】
Which technology can best protect data at rest on a user system?___
A. full-disk encryption
B. IPsec tunnel
C. router ACL
D. network IPS
【多选题】
Which two primary security concerns can you mitigate with a BYOD solution ?___
A. schedule for patching the device
B. securing access to a trusted corporate network
C. compliance with applicable policies
D. connections to public Wi-Fi networks
E. device tagging and invento
【多选题】
choose five___
A. MD5————————inserure
B. DES————————insercure
C. SDES———————legacy
D. SHA-1———————legacy
E. HMAC-MD5—————legacy
【多选题】
Which two characteristics of symmetric encryption are true?___
A. It uses digital certificates
B. It requires more resources than asymmetric ancryption
C. It uses the same key to enctypt and decrupt traffic
D. It uses a public key and a pricate key to encrypt and decrypt traffic.
E. It is faster than asymmetric encryption
【多选题】
which two characteristics of PVLAN are true?___
A. Promiscuous porta can communicate with PVLAN ports.
B. Isolated ports cannot communicate with other ports on the same VLAN
C. Community ports have to be a part of the trunk.
D. They require VTP to be enabled in server mode
E. PVLAN ports can be configured as Ether Channel ports
【多选题】
What are two options for running Cisco SDM?___
A. Running SDM from a mobile device
B. Running SDM from within CiscoWorks
C. Running SDM from a router's flash
D. Running SDM from the Cisco web porta
E. Running SDM from a PC
【多选题】
Which two options are the primary deployment modeles for mobile device management?___
A. multisite
B. cloud-based
C. on premises
D. hybrid cloud basedo
E. single site
【多选题】
Drag the recommendation on the left to the Cryptographic algorithms on the right, Options will be used more than once.___
A. Avoid——————————————DES,MD5
B. Legacy——————————————SDES,SHA1,HMAC-MD5
【多选题】
Which two are valid types of vLans using PVLANS ?___
A. Community VLAN
B. Backup VLAN
C. Secondary VLAN
D. Isolated VLAN
E. Isolated VLAN
【多选题】
Which two commands are used to implement Resilient lOS Configuration ___
A. Secure boot-config
B. copy running-config tftp
C. copy flash:ios bin tftp
D. copy running-config startup-config
E. secure boot-image
【多选题】
Which two types of firewalls work at layer 4 and above ?___
A. Stateful inspection
B. Network Address Translation
C. Circuit-Level gateway
D. Static packet filter
E. Application Level firewall
【多选题】
Which two default settings for port security are true ?___
A. Violation is Protect
B. Violation is Restrict
C. Violation is Shutdown
D. Maximum number of MAC addresses is 2
E. Maximum number of MAC addresses is 1
【多选题】
Which two are characteristics of RADIUS?___
A. Uses UDP ports 1812 /1813
B. Uses TCP port 49
C. Uses UDP port 49
D.
E. ncrypts only the password between user and server
【多选题】
When setting up a site-to-site VPN with PSK authentication on a Cisco router, which two elements must be configured under crypto map?___
A. pfs
B. nat
C. reverse route
D. peer
E. transform-set
【多选题】
When using the Adaptive Security Device Manager(ASDM), which two options are available to add a new root certificate?___
A. Install from SFTP server
B. Usehttps
C. Install from a file
D. Use LDAP
E. Use SCEP
【多选题】
Which two SNMPv3 services support its capabilities as a secure networ k manage protocol? ___
A. access control
B. the shared secret key
C. authentication
D. authorization
E. accounting
【多选题】
Which two statements about routed firewall mode are true ?___
A. The firewall acts as a routed hop in the network
B. This mode conceals the presence of the firewall
C. The firewall requires a unique iP address for each interface
D. This mode allows the firewall to be added to an existing networ k with minimal additional configuration By default, this mode permits most traffic to pass throug