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【单选题】
在Windows XP中,若要弹出快捷菜单,可以( )。(1.0分)
A. 单击鼠标左键
B. 双击鼠标左键
C. 三击鼠标左键
D. 单击鼠标右键
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答案
D
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经长时间运用制动缸前盖的( )容易被油污及杂物堵塞,所以定检时要清除。(1.0分)
A. 漏风沟
B. 排气堵
C. 活塞筒
D. 呼吸口
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缓解阀压阀杆的用途是在外力作用下压阀杆倾斜,副风缸的压力减小形成与主管的压力差而充气,迫使制动阀内主活塞移动之中间状态,从而使( )缓解。(1.0分)
A. 制动缸
B. 工作风缸
C. 副风缸
D. 降压风缸
【单选题】
120型阀有掌控着副风缸向( )充风的决定性作用。(1.0分)
A. 制动缸
B. 工作风缸
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D. 降压风缸
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GK型三通阀紧急部在紧急制动时使( )产生紧急局部减压,确保紧急制动沿列车方向迅速传播。(1.0分)
A. 制动缸
B. 制动管
C. 副风缸
D. 制动机
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GK型三通阀具有常用( )作用。(1.0分)
A. 全增压
B. 全制动
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中央处理器又称微处理器,简称( )。(1.0分)
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103型分配阀主阀安装面局减室排气限制孔为( )。(1.0分)
A. Ф1.0 mm
B. Ф0.8 mm
C. Ф0.5 mm
D. Ф0.2 mm
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103型分配阀紧急二段阀弹簧自由高为( )。 (1.0分)
A. 35.5~34 mm
B. 42.5~36.3 mm
C. 42.5~36.3 mm
D. 55.5~51.5 mm
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打开( )窗口后,窗口上有一个闪动的黑竖线,输入的文字就出现在插入点闪动位置。(1.0分)
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103型分配阀滑阀充气限制孔为( )。(1.0分)
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120型制动机的制动与缓解波速( )。(1.0分)
A. 高于103型制动机
B. 低于103型制动机
C. 等于103型制动机
D. 与103型制动机接近
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呼吸式安全阀密封性试验试验压力与开启压力之差不大于( ),保压时间不小于60s,无泄漏为合格。(1.0分)
A. 20KP
B. 30KP
C. 40KP
D. 50KP
【单选题】
120型控制阀主阀安装面局减室排气限制孔为( )。(1.0分)
A. 1.2mm
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120型控制阀紧急活塞杆稳定限制孔为( )。(1.0分)
A. 1.0mm
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120型控制阀滑阀充气限制孔为( )。(1.0分)
A. 1.2mm
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LA、LB型制动梁闸瓦托滑块上下面磨耗超过( )时更换,不得焊修。(1.0分)
A. 1mm
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C. 3mm
D. 4mm
【单选题】
120-1型控制阀作用部由( )、主膜板、O形橡胶密封圈、滑阀销、滑阀、节制阀、滑阀弹簧、节制阀弹簧、稳定杆等组成。(1.0分)
A. 涨圈
B. 减速弹簧
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ST1-600型闸瓦间隙自动调整器性能试验时(全部装用新闸瓦),须将螺杆调至( )。(1.0分)
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L-A型制动梁滑块磨耗套磨耗后剩余厚度小于( )或破损时更换。(1.0分)
A. 2mm
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C. 4mm
D. 5mm
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KZW-4空重车自动调整装置调整阀显示弹簧自由高为( )。(1.0分)
A. 38~40mm
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705型试验台做“缓解稳定性试验”时,操纵阀手柄应置( )。(1.0分)
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一个完整的微型计算机系统应包括( )。(1.0分)
A. 计算机及外部设备
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C. 硬件系统和软件系统
D. 系统软件和系统硬件
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中央处理器是微机的核心部件,担负着计算机的运算及( )功能。(1.0分)
A. 筛选
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计算机网络的应用越来越普遍,它的最大好处在于( )。(1.0分)
A. 节省人力
B. 存储容量大
C. 可实现资源共享
D. 使信息存储速度提高
【单选题】
装用ST2-600型闸调器的车辆(全部新闸瓦)试验前将闸调器的螺杆调至( )尺寸。(1.0分)
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B. 500~580mm
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进行闸调器试验时,经反复三次试验,测量活塞行程与初始行程差不得大于( )。(1.0分)
A. 20mm
B. 15mm
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120/120-1型制动机进行单车制动安定试验时,开启专用排风阀(5位)减压( )前,制动机不得发生紧急制动作用。(1.0分)
A. 200Kpa
B. 130Kpa
C. 140Kpa
D. 50Kpa
【单选题】
制动梁检修后,在横梁或撑杆上距支柱中心( )处,用白色油漆涂打检修单位简称和检修年月标记。字号为20号。(1.0分)
A. 100mm
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【单选题】
均衡风缸和列车管增压时,列车( )。(1.0分)
A. 制动
B. 缓解
C. 制动保压
D. 运行
【单选题】
JZ-7型空气制动机中( )控制列车管的充、排气,以实现列车的制动、缓解和保压作用。(1.0分)
A. 自动制动阀
B. 作用阀
C. 分配阀
D. 中继阀
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DF4型机车施行紧急制动时,由自动制动阀( )向撒砂作用阀供风。(1.0分)
A. 列车管
B. 撒砂管
C. 均衡风缸管
D. 中继管
【单选题】
JZ-7型空气制动机无动力装置由阻流塞、止回阀弹簧、截断塞门、( )组成。(1.0分)
A. 止回阀座
B. 滤尘器
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D. 以上均是
【单选题】
一般双管供风制的机车上,制动和总风软管的特征为( )。(1.0分)
A. 从车端看,制动软管在上方,总风软管在下方
B. 从车端看,制动软管在下方,总风软管在上方
C. 一般制动软管比总风软管短
D. 一般总风软管比制动软管外径要大
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球芯折角塞门手把处漏风的原因是( )。(1.0分)
A. 球芯缺油
B. 球芯表面偏磨
C. 密封垫圈失效
D. 阀体内卡脏
【单选题】
制动缸缓解不良的主要原因是( )。(1.0分)
A. 缓解弹簧折断
B. 活塞皮碗漏泄
C. 制动缸内漏风沟堵塞
D. 制动缸漏泄
【单选题】
机车的总闸瓦压力与其总重量的比值称( )。(1.0分)
A. 制动率
B. 制动倍率
C. 压力比重
D. 制动能
【单选题】
自动制动阀手柄从过充位移至运转位,过充压力消除较快,引起机车自然制动的原因( )。(1.0分)
A. 过充风缸上风堵松动或0.5 mm的小孔过大。
B. 过充管系泄漏。
C. 缓解桂塞阀的第二道0形圈(从左数起)损伤。
D. 以上都是
【单选题】
制动机由于橡胶密封元件失效造成的常见故障是( )。(1.0分)
A. 漏泄
B. 堵塞
C. 自然制动
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【单选题】
JZ-7型空气制动机自阀手柄在紧急制动位时,总风经主阀供气阀口、常用限压阀、紧急限压阀向( )充气(1.0分)
A. 工作风缸
B. 降压风缸
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D. 均衡风缸
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M10-6g-L中螺纹公差带代号只标一个6g是( )。(1.0分)
A. 顶径无公差要求
B. 中径无公差要求
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D. 标记错误
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