【判断题】【消耗次数:1】
电动机是利用电磁原理,把机械能转化为电能的电气设备。
正确
错误
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相关题目
【判断题】 电动机是将机械能转变为电能的机械。
①  正确
②  错误
【判断题】 电力拖动系统就是用电动机将电能转换成机械能,拖动生产机械,并完成一定工艺要求的系统吗?
①  正确
②  错误
【判断题】 电动机处于电气制动状态,电动机的电磁转矩和电动机的旋转方向相同。
①  正确
②  错误
【判断题】 异步电动机由原动机拖动并接负载,其从轴上输入的机械能转换成电能对外输出吗?
①  正确
②  错误
【单选题】 ( )是靠水泵将机械能转化为液体的动能和压能。
①  自然循环热水采暖系统
②  机械循环热水采暖系统
【判断题】 异步电动机若拖动负载旋转,其从电网中吸入的电能转换成轴上输出的机械能吗?
①  正确
②  错误
【判断题】 电气制动是使异步电动机所产生的电磁转矩和电动机的旋转方向相反。
①  正确
②  错误
【单选题】 发电机是将电能转换为机械能。
①  正确
②  错误
【单选题】 电动车四大电器件中将电能转换成机械能的装置是(  )。
①  电机
②  充电器
③  控制器
④  电池
【单选题】 当电动机的电枢回路铜损耗比电磁功率或机械功率都大时,这时电动机处于
①  电压反接的反接制动状态
②  能耗制动状态
③  倒拉反转制动状态
④  回馈制动状态
随机题目
【单选题】 The head of the museum was _____and let us actually examine the ancient manuscripts.
①  promising
②  agreeing
③  pleasing
④  obliging
【单选题】 Lucy,who did not even go to grade school, had no ________of a job at the time.
①  interview
②  pressure
③  prospect
④  application
【单选题】 The lecture provided ____ insight into foreign affairs.
①  penetrating
②  pendular
③  passive
④  penal
【单选题】 Linda is 35 years o1d and, after two close relationships, the prospect of staying single__________ her.
①  impresses
②  depresses
③  threatens
④  stuns
【单选题】 She insists that he ______ his now.
①  should
②  took
③  takes
④  take
【单选题】 The manager said that there were two reasons______ our sales dropped sharply last year.
①  because
②  since
③  why
④  while
【单选题】 Henry’ s actually ______ of telling lies, pretending to be sick when he s heathy.
①  capable
②  spontaneous
③  competent
④  expert
【单选题】 Mr. Brown had hardly said a word since supper,___ had his wife.
①  either
②  or
③  nor
④  So
【单选题】 Mary hopes to be ___ from hospital next week.
①  dismissed
②  discharged
③  expelled
④  resigned
【单选题】 _______ the look on his face, he doesn’t t quite understand what the speaker is saying.
①  Judge by
②  Judging by
③  To judge by
④  To be judged by