【判断题】
(32185)为了提高三相异步电动机的启动转矩，可使电源电压高于电机的额定电压，从而获得较好的启动性能。(1.0分)
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相关试题
【判断题】
(32186)康明斯发电车冷却风机的高低速切换是利用电机双绕组切换原理来达到的。(1.0分)
【判断题】
(32187)运用客车质量鉴定条件中，发电车48V蓄电池电解液面高度、密度、电压不符合规定属B类故障。(1.0分)
【判断题】
(32188)备用客车无须定期的对蓄电池进行补充电。(1.0分)
【判断题】
(32189)柴油机中控制冷却水大小循环的部件是节温器。(1.0分)
【判断题】
(32190)发电车的冷却装置是采用自然风利用列车的运行形成的风流进行热量交换。(1.0分)
【判断题】
(32191)各种车辆要保持消防器材齐全，作用良好；灭火器须使用电器、油料专用灭火器。(1.0分)
【判断题】
(32192)通过发电车电气控制，可以避免一切人为地误操作。(1.0分)
【判断题】
(32193)在康明斯电子调速器调速板中，SPEED ADJUST旋钮可调整的转速范围是±100转/分。(1.0分)
【判断题】
(32194)在康明斯电子调速器调速板中，RUN SPD旋钮可以在对外供电时来适当调整柴油机的转速。(1.0分)
【判断题】
(32195)发电车主开关DW914有手动、电动合闸、分闸模式。(1.0分)
【判断题】
(32196)当康明斯发电车需单机同时往Ⅰ、Ⅱ路供电时，只需在单机单路供电的基础上，再合4QF开关即可。(1.0分)
【判断题】
(32197)康明斯发电车中，当柴油机转速高于1725r/min时，将发生超速停机报警保护。(1.0分)
【判断题】
(32198)康明斯发电车中，当机油压力低于83kPa时，将发生低油压停机报警保护。(1.0分)
【判断题】
(32199)正常情况下柴油机是不消耗机油的。(1.0分)
【判断题】
(32200)发电车冷却滤网不能用水冲洗。(1.0分)
【判断题】
(32201)运用客车质量鉴定条件中，发电车膨胀水箱水位低于1/2，水质不符合规定属C类故障。(1.0分)
【判断题】
(32202)为了保持发电车日常清洁，发电车内需用水冲洗地板。(1.0分)
【判断题】
(32203)柴油机油底壳中机油越多越好。(1.0分)
【判断题】
(32204)柴油机在调整气门间隙时，必须在所要调整的气门处于完全关闭时进行。(1.0分)
【判断题】
(32205)正常情况下柴油机是不耗损机油的。(1.0分)
【判断题】
(32206)柴油机通常不宜在低速长时间运转。(1.0分)
【判断题】
(32207)KTA-19G2柴油机中LF777脏堵将造成柴油机低油压。(1.0分)
【判断题】
(32208)中间继电器也是电流继电器，只是触头较多。(1.0分)
【判断题】
(32209)时间继电器的触点是延时断开的。(1.0分)
【判断题】
(32210)热继电器中的双金属片弯曲作用是由于温度效应产生的。(1.0分)
【判断题】
(32211)热继电器的形式有许多，其中双金属片式用得最多。(1.0分)
【判断题】
(32212)柴油机“超速”与“飞车”是同一故障现象。(1.0分)
【判断题】
(32213)KTA-19G2柴油机喷油摇臂折断将造成油底壳进柴油。(1.0分)
【判断题】
(32214)带极高油位报警的康明斯发电车中，当手动位出现极高油位报警时，电路也将自动停止泵油，并同时发出声光双报警。(1.0分)
【判断题】
(32215)带极低油位报警的康明斯发电车中，当手动位出现极低油位报警时，电路也将自动开始泵油，并同时发出声光双报警。(1.0分)
【判断题】
(32216)康明斯发电车中，当水温超过85℃时，冷却风机会自动启动。(1.0分)
【判断题】
(32217)防止蓄电池长时间大电流放电，当单格电压降至8V或电解液密度降至1.17g/cm 3 时，应重新充电。(1.0分)
【判断题】
(32218)柴油机运行时出现“游车”现象，一定是燃油管路堵塞了。(1.0分)
【判断题】
(32219)柴油机燃油管路最易出现堵塞的地方是各滤清器的滤网。(1.0分)
【判断题】
(32220)发电车只要能满足全列车的供电需求，就可以编挂入任何运行速度的列车中。(1.0分)
【判断题】
(32221)进入青藏线的客车发电车对其柴油机的结构没有特殊的要求。(1.0分)
【判断题】
(32222)目前，发电车的最大输出功率分别有600kW、800kW、900kW。(1.0分)
【判断题】
(32223)发电车柴油发电机组的额定转速是50Hz。(1.0分)
【判断题】
(32224)柴油发电机组是指用柴油机提供动力，并与发电机组成的整体。(1.0分)
【判断题】
(32225)柴油发电机组只包含柴油机和发电机。(1.0分)
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