【单选题】
(76826)人工转动轴承检查时，可能会使用___。(1.0分)
A. 轴承磨合试验台
B. 轮对自动检测装置
C. 轴承故障诊断器
D. 轴承退卸机
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答案
C
解析
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相关试题
【单选题】
(76827)轴承压装后，轴端螺栓须均匀紧固，紧固力矩为___。(1.0分)
A. 210～220Nm
B. 212～222Nm
C. 214～224Nm
D. 216～226Nm
【单选题】
(76833)段修时，352226X2-2RZ型轴承的轴向游隙大于___时须退卸。(1.0分)
A. 0.075mm
B. 0.54mm
C. 0.58 mm
D. 0.75mm
【单选题】
(76835)前盖和后挡护缘内径面未经机械加工的须按图样要求补充加工，其尺寸应符合直径___ mm的限 度要求。(1.0分)
A. 170 +0.305 +0.145
B. 180 +0.305 +0.145
C. 190 +0.305 +0.145
D. 200 +0.305 +0.145
【单选题】
(76836)压装间的温度应不低于10℃。检测和选配前，轴承及附件、轮对及检测器具同室存放，放置时间 应不少于___小时。(1.0分)
A. 5
B. 6
C. 7
D. 8
【单选题】
(76837)轴箱前盖须选配组装，前盖凸缘端面应压紧轴承外圈端面，轴箱前盖须加装O型橡胶密封圈与轴箱 密封，组装后前盖与轴箱体端面应有___的间隙。(1.0分)
A. 0.2mm～1.0mm
B. 0.2mm～1.5mm
C. 0.2mm～2.0mm
D. 0.2mm～2.5mm
【单选题】
(76844)荧光磁悬液浓度（采用体积浓度）应控制在___范围内。(1.0分)
A. 0.1～0.6mL/100mL
B. 0.2～0.5mL/100mL
C. 0.2～0.6mL/100mL
D. 0.1～0.5mL/100mL
【单选题】
(76845)磁粉探伤通电磁化时间应为1s～3s，停止喷淋磁悬液后应再磁化___，每次0.5s～1.0s。(1.0 分)
A. １次～3次
B. 1次～2次
C. 2次
D. 2次～3次
【单选题】
(76847)以样板轮轴、轮对上相应部位深度为1.0mm的人工裂纹反射波达到垂直满幅的___ 时的dB值作 为相应探头的探伤灵敏度。(1.0分)
A. 40％
B. 60％
C. 80％
D. 100％
【单选题】
(76848)移动探头并调整仪器，使人工裂纹的一次反射波达到荧光屏垂直满幅的80％，然后补偿 ___， 以此作为RE2轮轴横波斜探头的探伤灵敏度。(1.0分)
A. 2dB～6dB
B. 6dB～12dB
C. 10dB～12dB
D. 12dB～18dB
【单选题】
(76852)轴身探伤作业时，使用的耦合剂应为水剂内供式乳化液；配置乳化液时皂化油与水的比例为 ___。(1.0分)
A. 1:5
B. 1:6
C. 1:8
D. 以上都不是
【单选题】
(76855)车轮踏面及轮缘旋修时其轮缘厚度可恢复到厂、段修及以上限度，但轮缘高度必须恢复到___。 (1.0分)
A. 26mm
B. 27mm
C. 28±1mm
D. 27±1mm
【单选题】
(76856)1999年3月以后生产的SKF197726型新造轴承，距首次压装时间满___时须退卸。(1.0分)
A. 4年6个月
B. 5年
C. 6年6个月
D. 7年6个月
【单选题】
(76857)1999年3月以后生产的SKF197726型轴承大修后，距首次压装时间满___时须退卸。(1.0分)
A. 4年6个月
B. 5年
C. 6年6个月
D. 7年6个月
【单选题】
(76859)轴承压装后必须左右旋转3～5圈，转动必须灵活，不得有卡阻现象，并进行转速≥___转/分 钟，时间≥5分钟的磨合试验，检查轴承状态，并做好记录。 (1.0分)
A. 120
B. 180
C. 200
D. 250
【单选题】
(76861)轴承压装后，进行转速不低于200r/min，时间不少于5min的磨合测试。磨合过程中轴承温升不应 高于___。(1.0分)
A. 25℃
B. 30℃
C. 35℃
D. 40℃
【单选题】
(76863)16号车钩弹性支承装置组装后，支承弹簧座腔顶部至支承托板下平面的距离须大于___。(1.0 分)
A. 40mm
B. 42mm
C. 44mm
D. 48mm
推荐试题
【单选题】
Which command successfully creates an administrative user with a password of "cisco"on a Cisco router?___
A. username Operator privilege 7 password cisco
B. username Operator privilege 1 password cisco
C. username Operator privilege 15 password cisco
D. username Operator password cisco privilege 15
【单选题】
Which EAP method authenticates a client against Active Directory without the use of client-side 802.1X certificates？___
A. EAP-TLS
B. EAP-MSCHAPv2
C. EAP-PEAP
D.
E. AP-GTC
【单选题】
What is a limitation of network-based IPS？___
A. It must be in dividually configured to support every operating system on the network.
B. It is most effective at the in dividual host level
C. It is unable to monitor attacks across the entire netw ork
D. Large installations require numerous sensors to fully protect the network
【单选题】
When would you configure the ip dhcp snooping trust command on a sw itch？___
A. when the switch is connected to a DHCP server
B. when the switch is working in an edge capacit
C. when the switch is connected to a client system
D. when the switch is serving as an aggregator
【单选题】
How does the 802. 1x supplicant communicate with the authentication server？___
A. The supplicant creates EAP packets and sends them to the authenticator, which encapsulates them into RADIUS and forwards them to the authentication server.
B. The supplicant creates RADIUS packets and sends them to the authe nticator, which encapsulates the m into EAP and forwards them to the a uthentication server.
C. The supplicant creates RADIUS packets and sends them to the authenticator, which translates them into eap and forwards them to the a ut hentication server
D. The supplicant creates
E. AP packets and sends them to the authe nticator, which translates them into radius and forwards them to the authentication server.
【单选题】
Which command do you enter to verify the phase I status of a VPN connection？___
A. sh crypto se ssion
B. debug crypto isakmp
C. sh crypto isakmp sa
D. sh crypto ipsec sa
【单选题】
Refer to the exhibit. what is the e ffect of the given configuration？___
A. It enables authentication，
B. It prevents keychain authentication.
C. The two routers receive normal updates from one another.
D. The two device s are able to pass the message digest to one another.
【单选题】
Which command can you enter to configure OSPF to use hashing to authenticate routing updates？___
A. ip ospf aut hentication message-digest
B. neighbor 192 168.0 112 cost md5
C. ip ospf priority 1
D. ip ospf aut hentication-key
【单选题】
Which command can you enter to verify the status of Cisco lOS Resilient Configuration on a Cisco router?___
A. show secure bootset
B. secure boot-image
C. show binary file
D. ure boot-config
【单选题】
A user on your network inadvertently activates a botnet program that was received as an emai attachment. Which type of mechanism does Cisco Firepower use to detect and block only the botnet attack？___
A. network-based access control rule
B. reputation-based
C. user-ba sed access control rule
D. botnet traffic filter
【单选题】
What does the policy map do in CoPP？___
A. defines service parameters
B. defines packet selection parameters
C. defines the packet filter
D. define s the action to be performed
【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？___
A. 4
B. 3
C. 2
D. 5
【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.
