【单选题】
(76808)轮对第一次组装的标记属___标记。(1.0分)
A. 永久性
B. 非永久性
C. 必须保留三个厂修以上
D. B与C两者
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相关试题
【单选题】
(76809)轮对组装标记中，___可以不必永久保留。(1.0分)
A. 第一次组装标记
B. 第二次组装标记
C. 该轴标记
D. 降等级标记
【单选题】
(76810)下列车轴制造标记中，各项对应不正确的是___。(1.0分)
A. 车轴钢冶炼熔炼号:931128
B. 车轴钢钢种标记:B
C. 车轴制造(锻造)单位代号:183
D. 车轴锻造年月:0508
【单选题】
(76811)货车50钢滚动轴承车轴使用时间达___时，发现车轴上有横裂纹时不再装车使用。(1.0分)
A. 15年
B. 20年
C. 25年
D. 30年
【单选题】
(76812)滚动轴承车轴在厂、段修时，轴颈和防尘板座锈蚀，可用00号砂布蘸油打磨，打磨后允许有___。(1.0分)
A. 轻微打伤
B. 轻微磨伤
C. 轻微痕迹
D. 轻微拉伤
【单选题】
(76813)新制车轴精车后表面粗糙度须达到___及以上。(1.0分)
A. Ra1.6μm
B. Ra3.2μm
C. Ra6.4μm
D. Ra12.5μm
【单选题】
(76814)车辆颠覆或脱轨时，须对全车轮对车轴施行全轴超声波穿透探伤检查和对轮座镶入部、___施 行超声波探伤检查。(1.0分)
A. 轴颈卸荷槽
B. 车轴
C. 盘座镶入部
D. 轴身
【单选题】
(76815)热轴的形式有___(1.0分)
A. 外圈制造质量问题导致的热轴
B. 保持架断裂导致的热轴
C. 密封罩或外油封故障导致的热轴
D. 以上都是
【单选题】
(76816)轮对厂修时，轮位差超过___，轮对报废。(1.0分)
A. 3mm
B. 4mm
C. 5mm
D. 6mm
【单选题】
(76817)货车无轴箱圆锥滚动轴承装置一般由外圈、___、滚子和保持架组成。(1.0分)
【单选题】
(76818)353130B型轴承采用了___型油封。(1.0分)
A. 接触式油封
B. 迷宫式油封
C. LL型油封
D. 无油封
【单选题】
(76819)353130B型轴承单个内圈上滚子数为___。(1.0分)
A. 18个
B. 20个
C. 21个
D. 23个
【单选题】
(76820)轮对收入测量时，RD2型原型轮对轴颈公称直径上偏差值为___mm。(1.0分)
A. +0.052
B. +0.025
C. +0.058
D. +0.085
【单选题】
(76821)轮对收入测量时，RD2型原型轮对轴颈公称直径下偏差值为___mm。(1.0分)
A. +0.052
B. +0.025
C. +0.058
D. +0.085
【单选题】
(76822)轮对收入测量时，RD2型厂修轮对轴颈公称直径下偏差值为___mm。(1.0分)
A. +0.010
B. +0.025
C. +0.058
D. +0.085
【单选题】
(76824)货车轮对压装后，左右轮位差不得超过___。(1.0分)
A. 1mm
B. 2mm
C. 3mm
D. 4mm
【单选题】
(76825)轮对压装后，轮对内侧距离须符合该规定：轮辋宽135mm及以上者为___，以轮辋宽度最小者 为准。(1.0分)
A. 1353±1mm
B. 1353±2mm
C. 1353±3mm
D. 1353±4mm
【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
【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】
(76828)无轴箱滚动轴承压装中止贴合压力应大于最大压装力___以上。(1.0分)
A. 88.2kN
B. 196kN
C. 216kN
D. 247kN
【单选题】
(76829)352226X2－2RZ（TN）型大修轴承，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】
(76830)352226X2－2RZ（TN）型大修轴承，运行___km时须退卸。(1.0分)
A. 45万km
B. 50万km
C. 65万km
D. 75万km
【单选题】
(76831)353130B型新造或大修轴承，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】
(76832)遭受火灾车上的轮对，轴承外观检测良好，则该条轮对___。(1.0分)
A. 可装车使用
B. 应退检轴承
C. 轴承应报废
D. 轮对送厂
【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】
(76834)以下除___外，须退卸轴承。(1.0分)
A. 轴承密封失效
B. 电流通过轴承
C. 装用进口轴承
D. 外圈破损
【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)
【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】
(76838)___不属于送厂轮对故障。(1.0分)
A. 左辋超限
B. 幅板孔裂纹5mm
C. 右辋超限
D. 左轮辋裂
【单选题】
(76839)目前正在要求淘汰的车轮是___(1.0分)
A. 铸钢车轮
B. 辗钢车轮
C. 幅板孔车轮
D. 无幅板孔车轮
【单选题】
(76840)车轮辐板孔存在周向裂纹长度不超过___mm时，须在车统—51C卡片的轮对检修故障栏内做好记 录。(1.0分)
【单选题】
(76841)不退卸轴承的轮轴在冲洗前须加装防水保护套，以防止___。(1.0分)
A. 轴承生锈
B. 车轴生锈
C. 轴承进水
D. 轴承转动
【单选题】
(76842)有辐板孔车轮的内侧辐板孔部位经除锈后各部位表面须露出___，不得有油漆、锈垢存在。(1.0 分)
A. 基本金属面
B. 倒角
C. 辐板孔轮廓面
D. 孔状
【单选题】
(76843)达不到探伤要求时，应进行___补充除锈，否则不得进入下道工序。(1.0分)
【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】
(76846)退磁后，轮对剩磁不得超过___。(1.0分)
A. 0.3mT(7Gs)
B. 0.7mT(7Gs)
C. 0.5mT(7Gs)
D. 10mT(7Gs)
【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】
(76849)超声波___在很大程度上决定了超声波对缺陷的探测能力。(1.0分)
A. 波长
B. 频率
C. 声速
D. 以上都不对
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