【单选题】
区间桥梁应按（）年设计使用年限设计。___
A. 50
B. 100
C. 150
D. 200
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答案
B
解析
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相关试题
【单选题】
在列车横向摇摆力、离心力、风力和温度力作用下，桥跨结构梁体水平挠度应小于等于计算跨度的（）。___
A. 1/3000
B. 1/4000
C. 1/5000
D. 1/6000
【单选题】
在列车活载作用下，桥跨结构梁体同一横断面一条线上两根钢轨的竖向变形差形成的两轨动态不平顺度不应大于（）。___
A. 4mm
B. 5mm
C. 6mm
D. 7mm
【单选题】
桥上轨道宜采用无砟轨道结构。当采用有砟道床时，轨道下枕底道砟厚度不应小于（）,当设置砟下胶垫层时应含胶垫层的厚度。___
A. 0.25m
B. 0.30m
C. 0.35m
D. 0.40m
【单选题】
桥下应设养护、维修便道，便道的宽度应满足自行走行升降式桥梁检修车能进行检修作业要求；高度超过（）、桥下无条件设置养护维修便道处，宜设置专门检查设备。___
A. 25m
B. 20m
C. 30m
D. 40m
【单选题】
预应力混凝土梁的封锚及接缝处，应在构造上采取防水措施。对于结构有可能产生裂缝的部位，应增设（）防止裂缝的发生。___
A. 八字撑
B. 防护栏杆
C. 剪刀撑
D. 普通钢筋
【多选题】
"车站结构完好标准？___
A. 地基地坪：有足够的承载力，无超过设计允许范围的不均匀沉降。地坪面层平整完好，无空鼓、裂缝、起砂。
B. 承重构件:梁、柱、墙、板平直牢固，无倾斜变形、裂缝、锈蚀。
C. 轨顶风道内无异物，无混凝土剥落、掉块。
D. 车站顶板的变形缝、诱导缝安装有截水盒，无结构渗漏水；
E. 离壁沟排水畅通，无积水、垃圾。
【多选题】
"车站结构轻微损坏标准___
A. 地基地坪：有承载能力、稍有超过设计允许范围的不均匀沉降，但已稳定。整体面层稍有裂缝、空鼓、起砂。
B. 承重构件：有少量损坏，基本牢固。
C. 钢筋混凝土个别构件有轻微变形、细小裂缝，混凝土有轻度剥落、露筋。
D. 车站公共区、轨行区、设备区有局部渗漏水，不影响乘客、列车、设备。
E. 承重墙体（柱）、砌块强度和稳定性严重不足，有严重裂缝、倾斜、弓凸、风化、腐蚀和灰缝严重酥松损坏。
【多选题】
"车站结构严重损坏标准___
A. 地基地坪：承载力不足，有明显不均匀沉降或明显滑动、压碎、折断、腐蚀等损坏，道床与结构底板剥离、开裂，并且在仍然在继续发展，对上部结构有明显影响。整体面层严重起砂、剥落、裂缝、沉陷、空鼓。
B. 承重构件：明显损坏，刚度、强度不足。
C. 离壁沟防水层严重开裂、松动、腐蚀、破损。
D. 结构变形缝、诱导缝止水钢板拉裂，结构渗漏水严重。
E. 承重墙体（柱）、砌块强度和稳定性严重不足，有严重裂缝、倾斜、弓凸、风化、腐蚀和灰缝严重酥松损坏。
【多选题】
“四不放过”是指 。___
A. 事故原因不查清不放过
B. 责任人员未处理不放过
C. 整改措施未落实不放过
D. 有关人员未受到教育不放过
E. 事故过程不清楚不放过
【多选题】
涵洞必须保持状态完好，如发现下列状态之一时，应及时处理：___
A. 涵身破损、变形、错位、拉开造成漏土。
B. 涵身、翼墙、垂裙的基底全部或局部冲空。
C. 涵洞大面积腐蚀、风化、钢筋外露、剥落影响使用功能。
D. 基底冒水、潜流，洞内渗漏水影响路基稳定。
E. 涵洞下沉造成线路轨道变形。
【多选题】
盆式橡胶支座有下列状态之一时，应及时修理：___
A. 盆环开裂或脱焊。
B. 聚四氟乙烯板磨耗严重，外露厚度不足0.5mm。
C. 位移或转角超限，位移量≥10mm，转角超过设计值的20%。
D. 锚栓剪断数量超过25%。
E. 梁底预埋钢板和不锈钢板外露面防锈漆脱落或已遭腐蚀。
【多选题】
后浇带的防水施工应符合下列规定：___
A. 后浇带应在其两侧混凝土龄期达到42d后再施工；
B. 后浇带应在其两侧混凝土龄期达到28d后再施工；
C. 后浇带应采用补偿收缩混凝土，其强度等级不得低于两侧混凝土；
D. 后浇带混凝土养护时间不得少于28d。
E. 后浇带混凝土养护时间不得少于42d。
【多选题】
隧道结构巡检主要包含___
A. 隧道有否大于0.2mm的贯穿裂缝
B. 隧道有否顶部滴漏、侧面渗水、底部渗水现象
C. 管片连接螺栓、螺帽有无缺失
D. 管片混凝土有否剥落、掉块及露筋
E. 管片环缝、纵缝有无张开、错台超过10mm
【多选题】
下列哪项不属于隧道结构巡检内容___
A. 管片连接螺栓、螺帽修补
B. 管片环缝、纵缝有无张开、错台超过10mm
C. 清除隧道顶部即将掉落的堵漏材料
D. 管片连接螺栓、螺帽有无缺失
E. 管片混凝土有否剥落、掉块及露筋
【多选题】
综合维修主要包含___
A. 管片连接螺栓、螺帽修补
B. 区间通道（水泵房）排水堵塞整治
C. 矩形隧道变形缝渗漏及止水带脱落现象整治
D. 隧道内纤维片材料等补强材料的脱落抽丝现象整治
E. 结构不均匀沉降整治
【多选题】
隧道结构大修主要包含___
A. 管片混凝土剥落、掉块及露筋整治
B. 隧道内渗砂、漏泥病害整治
C. 整体道床开裂、轨枕与道床间裂隙整治
D. 整体道床与管片剥离现象整治
E. 浮置板道床两侧防尘装置破损修补
推荐试题
【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？___
A. 2
B. 3
C. 4
D. 5
【单选题】
What does the dh group refer to？___
A. length of key for hashing C
B. length of key for encryption
C. tunnel lifetime key
D. length of key for key exchange
E. length of key for authentication
【单选题】
Which path do you follow to enable aaa through the SDM ？___
A. Configure Tasks > AAA
B. Configure > Addition Authentication > AAA
C. Configure > AAA
D. Configure > Additional Tasks > AAA
E. Configure Authentication > AAA
【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
