刷题
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【单选题】
(32752)润滑系中旁通阀的作用是( )。(1.0分)___
A. 保证主油道中的最小机油压力
B. 防止主油道过大的机油压力
C. 防止机油粗滤器滤芯损坏
D. 在机油粗滤器滤芯堵塞后仍能使机油进入主油道内
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答案
D
解析
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【单选题】
(32753)电机中产生感应磁场的部分是( )。(1.0分)___
A. 磁极
B. 励磁系统
C. 电枢
D. 转子
【单选题】
(32754)康明斯发电车所使用的1FC5356发电机采用可控相复励,其励磁电流由电压和电流两个分量合成,其中电压分量和电流分量分别由( )提供。(1.0分)___
A. 电抗器,电容器
B. 电抗器,电流互感器
C. 电容器,电流互感器
D. 变压器,电容器
【单选题】
(32755)三相电动机三相绕组的3个空间位置间歇( )。(1.0分)___
A. 30°
B. 60°
C. 90°
D. 120°
【单选题】
(32756)把发电机三个绕组的始、末端依次连接成一个三角形的闭合回路,从三个联接点引出三根导线向外送电,这种联接方式叫三相电源的( )联接。(1.0分)___
A. Y形
B. △形
C. 叉形
D. 环形
【单选题】
(32757)把发电机三个绕组的末端接在一起,三个始端引出三根相线向外送电,这种联接方式叫三相电源的( )联接。(1.0分)___
A. Y形
B. △形
C. 叉形
D. 环形
【单选题】
(32758)康明斯发电车所使用的1FC5356发电机中的静止整流模块有( )。(1.0分)___
A. 1块
B. 2块
C. 3块
D. 4块
【单选题】
(32759)发电机1FC5356的稳压精度是( )。(1.0分)___
A. 0.5%
B. 1%
C. 1.5%
D. 2%
【单选题】
(32760)当发电车起机时,如果发电机剩磁太弱,那就必须在端子F1和F2上给发电机加上人工励磁,所加电压和位置正确的说法是( )。(1.0分)___
A. 所加电压是48V直流电,且加在励磁机的定子线圈上
B. 所加电压是24V直流电,且加在主发电机的转子线圈上
C. 所加电压是24V直流电,且加在励磁机的定子线圈上
D. 所加电压是48V直流电,且加在主发电机的定子线圈上
【单选题】
(32761)电动机采用星形-三角形启动,这种方法适用于运行时是三角形接法的电动机,其启动电流是直接启动的( )。(1.0分)___
A. 1/2
B. 1/3
C. 1/4
D. 1/5
【单选题】
(32762)关于康明斯发电车24V蓄电池可能充电方式的叙述中,错误的是( )。(1.0分)___
A. 本车Ⅰ机充电
B. 本车Ⅱ机充电
C. 车载充电柜充电
D. Ⅰ路外接充电
【单选题】
(32763)康明斯发电车中柴油机应急起动电源是从( )接来的。(1.0分)___
A. 24V电源电路
B. 48V电源电路
C. 220V电路
D. 本车用电电路
【单选题】
(32764)康明斯发电车交流燃油泵1#与2#的切换是利用( )原理来达到的。(1.0分)___
A. 电机双绕组切换
B. Y/△切换
C. △/Y切换
D. 两台电机切换
【单选题】
(32765)发电车柴油机如果回油管被堵,会出现( )现象。(1.0分)___
A. 柴油机停机
B. 柴油机转速时高时低
C. 柴油机超速
D. 柴油机冒蓝烟
【单选题】
(32766)库内发电车膨胀水箱冷却液的液面高度不得低于箱体的( )。(1.0分)___
A. 1/1
B. 3/4
C. 1/2
D. 1/4
【单选题】
(32767)康明斯发电车中,冷却风机高速运行时功率为( )。(1.0分)___
A. 18.5kW
B. 5kW
C. 960kW
D. 1500kW
【单选题】
(32768)火灾报警器必须( )作用良好。(1.0分)___
A. 30%
B. 50%
C. 80%
D. 100%
【单选题】
(32769)火灾报警器报警音量不低于( )。(1.0分)___
A. 50db
B. 60db
C. 70db
D. 80db
【单选题】
(32770)康明斯发电车中,当柴油机水温低于( )时,将发生低水温报警。(1.0分)___
A. 0℃
B. 40℃
C. 60℃
D. 90℃
【单选题】
(32771)在康明斯发电车电气控制电路中,下面( )线圈间存在直接的互锁关系。(1.0分)___
A. 1QF和3QF
B. 2QF1和2QF2
C. 1KA9和3KA9
D. 1QF和4QF
【单选题】
(32773)康明斯发电车中,当干线电流超过( )时,将发出过电流脱扣报警,相应主开关立即自动分闸。(1.0分)___
A. 500A
B. 600A
C. 1000A
D. 2000A
【单选题】
(32774)康明斯发电车中,当干线电流超过( )时,将发出过电流预报警,相应主开关不分闸。(1.0分)___
A. 500A
B. 600A
C. 1000A
D. 2000A
【单选题】
(32775)一只电流表与一只变流比为600/5A的电流互感器配用,测量满载为600A的负载电流,当电流表读数为3A时,电路的实际电流为( )。(1.0分)___
A. 3A
B. 120A
C. 360A
D. 600A
【单选题】
(32775)一只电流表与一只变流比为600/5A的电流互感器配用,测量满载为600A的负载电流,当电流表读数为3A时,电路的实际电流为( )。(1.0分)___
A. 3A
B. 120A
C. 360A
D. 600A
【单选题】
(32776)有一内阻为15Ω的电流表,最大量程是1A,现给它并联一个05Ω的小电阻,则这个电流表的量程可扩大为( )。(1.0分)___
A. 3A
B. 4A
C. 6A
D. 9A
【单选题】
(32777)康明斯发电调速控制箱面板中,能使起动电机转动的是( )。(1.0分)___
A. SPEEDADJUST
B. CIRCUITBREAKER
C. CRANK
D. IDLE/RUN
【单选题】
(32778)康明斯发电车中,可以调整柴油机怠速转速的是( )。(1.0分)___
A. GAIN
B. SPEEDADJUST
C. RUNSPD
D. IDLESPD
【单选题】
(32779)康明斯发电车中,机组带负载时可以调整柴油机±100r/min的是( )。(1.0分)___
A. GAIN
B. SPEEDADJUST
C. RUNSPD
D. IDLE
【单选题】
(32780)冷却风机电动机低速热继电器和高速热继电器的整定值为( )。(1.0分)___
A. 14A、40A
B. 15A、40A
C. 15A、50A
D. 14A、55A
【单选题】
(32781)在康明斯发电车I号冷却风机控制电路中,实现手动与自动的选择开关是( )。(1.0分)___
A. 1SA2
B. 1SA3
C. 1SB4
D. 1SB5
【单选题】
(32782)在康明斯发电车I号冷却风机控制电路中,实现低速与高速的转换的开关是( )。(1.0分)___
A. 1SA2
B. 1SA3
C. 1SB4
D. 1SB5
【单选题】
(32783)康明斯发电车中,当柴油机水温低于( )时,将发生低水温报警保护。(1.0分)___
A. 0℃
B. 40℃
C. 60℃
D. 90℃
【单选题】
(32784)康明斯发电车本车用电有( )供电方式。(1.0分)___
A. 3种
B. 4种
C. 5种
D. 6种
【单选题】
(32785)在康明斯发电车运行途中,本车用电电源选择开关打到( )位时,本车不可能有电。(1.0分)___
A. I机组
B. II机组
C. I路外接
D. 车底外接
【单选题】
(32786)在康明斯发电车配电屏内的电路中,5(6)字头线号的导线一般为( )设备供电。(1.0分)___
A. Ⅰ号机组
B. Ⅱ号机组
C. 联络开关或并车电路
D. 本车用电
【单选题】
(32787)同一发电车各柴油发电机组须均衡使用,各机组运转工时差最多不得超过( )。(1.0分)___
A. 80h
B. 90h
C. 100h
D. 110h
【单选题】
(32788)运用客车每年应进行( )次集中整修。(1.0分)___
A. 1
B. 2
C. 3
D. 4
【单选题】
(32789)检查机油油位是在康明斯柴油机( )保养中进行。(1.0分)___
A. A级
B. B级
C. C级
D. D级
【单选题】
(32790)清洗曲轴箱通风装置是在康明斯柴油机( )级保养中进行。(1.0分)___
A. A
B. B
C. C
D. D
【单选题】
(32791)康明斯发电车中所有滤清器中,不是一次性使用的是( )。(1.0分)___
A. FF105
B. LF777
C. LF670
D. PT泵内磁性滤油网
【单选题】
(32792)柴油机气门间隙应在气门处于( )状态时进行调整。(1.0分)___
A. 打开
B. 关闭
C. 气门重叠
D. 任意
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能够真正实现把马克思主义的普遍真理与本国的具体实际相结合,科学地解决问题本国革命、建设和改革的问题表明马克思主义政党 ___
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马克思主义政党的组织原则是 ___
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劳动人民取得政权以后首先需要 ___
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马克思主义政党的最高纲领和最终奋斗目标是 ___
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