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24172.___工人的作业速度与其熟练程度、努力程度、工作环境和操作的一致性有关。
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24173.___在 CAN 总线中,无论是数据帧还是远程帧,仲裁场即是指标识符,控制场即是指DLC。
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24174.___在 CAN 总线中,标识符的高 7 位不能全是隐性位。
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24175.___在 CAN 总线 2.0 技术规范中,振荡器容差额定值提高到 1.58%,使得采用陶瓷振荡器即可达到 CAN 总线最高通信速率 1Mbps。
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24176.___在 DeviceNet 现场总线中,显式信息连接为无条件的点对点连接。
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24177.___在 CAN 总线中,当引起重同步的沿的相位误差数值大于重同步跳转宽度时,若相
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24178.___现场管理的 3 大手法:5S 管理、目视管理和定置管理。
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24179.___工作抽样法可以研究设备的开动情况,查找机器开动率低的原因,对设备管理进行改善。
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24180.___DeviceNet 现场总线中,在仅限组 2 设备上线后,但在预定义主/从连接组分配前,仅限组 2 未连接显式请求报文端口和重复 MAC.ID 检验报文端口是仅激活的端口。
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24181.___自动重合闸只能动作一次,避免把断路多次重合至永久性故障上。
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24182.___变送器的输入电流回路的端子应使用电流型的端子,不得使用普通接线端子。
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24183.___电力系统中的开关断路器状态、保护信号等遥信量是数字信息。
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24184.___调度员下发遥控命令时,只要确信遥控对象、性质无误,为了节省时间,不必等待返校信息返回就可以操作“执行”命令。
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24185.___RTU 与调度端的通讯必须采用同步通讯模式。
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24186.___时间分辨率是事件顺序记录的一项重要指标。
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24187.___交流采样装置的虚负荷检验是在其断开运行状态下使用的一种检验方法。
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24188.___目视管理要把握三要点:透明化、状态视觉化和状态定量化。
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24189.___物流管理是供应链管理的一种执行智能。
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24190.___对于带有电池的 UPS 电源,如果逆变回路故障,输出将切换到旁路上,此时负载失去保护,由交流输入电源直接供电。
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24191.___母线的出线电流的代数和等于进出线的电流代数和。
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24192.___站内微机保护的接地和站内电气设接地连在一起。
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24193.___当由于线圈、绝缘件、导线或电缆芯受潮导致绝缘不合格时,用灯泡、电吹风进行干燥,可提高其绝缘强度。
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24194.___用两只功率表不能准确测量三相三线制电路中的有功功率。
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24195.___变电站所用电流互感器和电压互感器的二次绕组应有永久性的、可靠的保护接地。
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24196.___三相五柱式电压互感器有两个二次绕组,一个接成星形,一个接成开口三角形。
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24197.___全电路欧姆定律可应用于任一回路。
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24198.___质量信息是指反映产品质量和产、供、销各环节的各种情报、基本数据、原始记录,以及产品在使用过程中反映出来的各种技术经济资料。
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24199.___对待荣誉的动机纯洁与否可以反映出一个人的道德水准的的高低。
【填空题】
24200.___好的信誉来自好的质量。
【单选题】
下面 不能减少工艺系统受力变形 ___
A. 增大切削用量
B. 提高接触刚度
C. 提高工件刚度
D. 减小切削力
【单选题】
导线的识别标记是 以识别导线或线束的标记 ___
A. 标在导线或线束两端,必要时标在其全长的可见部位
B. 只标在导线或线束的首段
C. 只标在导线或线束的末段
D. 只标在电气图上
【单选题】
在切削速度加大到一定值后,随着切削速度继续加大,切削温度 ___
A. 平稳并趋于减小
B. 停止升高
C. 继续升高
D. 不变
【单选题】
与常规切削加工相比,高速切削加工的单位时间内材料切除率 ___
A. 是常规切削加工的 3~6 倍或更高
B. 低于常规切削加工
C. 略高于常规切削加工
D. 与常规切削加工相当
【单选题】
关于高速切削, 的描述是错误的 ___
A. 由于主轴转速高,所以易造成机床振动
B. 切削力减小,有利于薄壁、细长杆等刚性零件的加工
C. 由于 95%以上的切削热被切屑迅速带走,所以适合加工易产生热变形及热损伤要高较高的
【单选题】
用于高速切削(>4000r/min)的回转刀具, 的描述是不准确的 ___
A. 只能采用 1/10 短锥刀柄形式
B. 刀片不允许采用摩擦力夹紧方式
C. 必须经过动平衡测试
D. 刀柄和主轴的锥面及端面同时接触
【单选题】
化结构,从而减少传动环节,具有更高的可靠性 ___
A. 交流伺服
B. 步进伺服
C. 直流伺服
D. 内装
【单选题】
C.条件①和② D.条件①和③ 11009.下面有关高速加工工艺特点的说法错误的是 ___
A. 高速加工应尽量采用低压、外部冷却方式
B. 高速加工具有高的切削速度
C. 高速加工采用小层深的分层切削
D. 相较于普通数控加工,高速加工的刀轨更需要流畅
【单选题】
中央精神文明建设指导委员会决定,将 定为“公民道德宣传日” ___
A. 9 月 20 日
B. 9 月 10 日
C. 10 月 10 日
D. 10 月 20 日
【单选题】
系统设置主轴的最高转速为 3000 转/分,主轴转速的控制系统选择的是由 0~10V 的模拟电压,那么如果系统中输入 M03 S1000 的指令,此时数控系统模拟接口输出的主轴指令电压是 ___
A. 3.3V
B. 5V
C. 10V
D. 6.6V
【单选题】
在 FANUC 数控系统中,用户宏程序是指含有 的程序 ___
A. 变量
B. 子程序
C. 常量
D. 固定循环
【单选题】
子程序是不能脱离 而单独运行的 ___
A. 主程序
B. 跳转程序
C. 宏程序
D. 循环程序
推荐试题
【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
B. access point
C. ASA
D. Identity Services
E. ngine
【单选题】
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
【多选题】
Which two statements describe DHCP spoofing attacks?___
A. They are used to perform man-in- the-middle attacks
B. They can access most network devices
C. They can modify the flow of traffic in transit. LNGKAIG
D. They protect the identity of ti attacker by masking the DHCP address
E. They can physically modify the network gateway
【多选题】
Which two types of VLANs using PVLANs are valid?___
A. isolated
B. promiscuous
C. backup
D. secondary
E. community
【多选题】
What are two limitations of the self-zone policies on a zone-based firewall?___
A. They are unable to block Https traffic
B. They restrict SNMP traffic.
C. They are unable to support Https traffic
D. They are unable to implement application inspection
E. They are unable to perform rate limiting
【多选题】
Which two descriptions of TACACS+ are true? ___
A. The TACACS+ header is unencrypted
B. It combines a uthentication and authorization
C. It uses TCP as its transport protocol
D. Only the password is encrypted.
E. It uses UDP as its transport protocol.
【多选题】
Which two actions does an IPS perform? ___
A. it spans the traffic
B. it reflects the traffic back to the sender
C. it encrypts the traffic
D. it terminates the user session or connection of the attacker
E. it reconfigures a device to block the traffic
【多选题】
In which form of fraud does an attacker try to learn information such as login credenti account information by ma squerading as a reputable entity or person in email, IM or communication channels ?___
A. phishing
B. Smurfit
C. Hacking
D. Identity Spoofing
【多选题】
Which two ESA services are available for incoming and outgoing mails ?___
A. anti-DoS
B. reputation filter
C. antispam
D. content filter
E. DLP
【多选题】
What are two reasons to recommend SNMPv 3 over SNMPv2?___
A. SNMPv3 is secure because you can configure authe ntication and privacy
B. SNMPv3 is insecure because it send in formation in clear text
C. SNMPv2 is insecure because it send information in clear text
D. SNMPv3 is a Cisco proprietary protocol
E. SNMPv2 is secure because you can configure authentication and privacy