【单选题】
检查和保养电器时要切断电源，机车辅修、小修时要用___的压缩空气吹扫电器，或用毛刷、棉布擦拭电器，使各电器保持清洁干燥。P77T350
A. 200～300kPa
B. 300～350kPa
C. 400～550kPa
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答案
B
解析
暂无解析
相关试题
【单选题】
在列车施行常用制动后，若制动管再继续减压,制动缸的压力也不会再上升,这个使双方压力均衡时的制动管减压量,称为___。P109T462
A. 最大有效减压量
B. 最小减压量
C. 追加减压量
【单选题】
货物列车运行中,自阀减压排风未止,不得缓解机车制动;自阀减压后至缓解、停车前,机车制动缸压力不得少于___。P115T486
A. 50kPa
B. 60kPa
C. 70kPa
【单选题】
列车在运行中,司机应按照“___”操纵列车,按规定使用列车运行监控记录装置、无线调度电话、机车自动信号以及机车自动停车装置,并严格执行呼唤应答和车机联控制度。P117T493
A. 列车操纵示意图
B. 列车运行图
C. 机车周转图
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