【判断题】【消耗次数:1】
通过检查发电机的励磁电路和发电机本身,查不出不充电故障的具体部位。()
正确
错误
参考答案:
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相关题目
【单选题】 发电机调节器是通过调整( )来调整发电机电压的。
①  发电机的转速
②  发电机的励磁电流
③  发电机的输出电流
【单选题】 造成发电机不充电的原因是
①  发动机转速低
②  蓄电池不亏电
③  调节器故障
④  充电指示灯灯丝断路
【简答题】 交流发电机开始发电时,需要由[填空]供给励磁电流。
【单选题】 发电机出现不发电故障,短接触电式调节器的“+”与F接线柱后,发电机开始发电,这说明故障出在( )。
①  发电机
②  电流表
③  调节器
【单选题】 改变同步发电机的励磁电流,只能调节无功功率。
①  正确
②  错误
【判断题】 夏季行车,应适当调整发电机调节器,增大发电机的充电电流。
①  正确
②  错误
【判断题】 同步发电机并电网运行,要调节其发出的有功功率,则必须调节发电机的励磁。
①  正确
②  错误
【单选题】 交流发电机所采用的励磁方法是( )。
①  自励
②  他励
③  先他励后自励
【判断题】 同步发电机理想并网的条件是:发电机与电网电压大小相等且波形一致;?发电机与电网电压频率相同;发电机与电网电压相位相同;?发电机与电网电压相序一致。
①  正确
②  错误
【判断题】 三相异步发电机的可以用大型发电机用?
①  正确
②  错误
随机题目
【单选题】 9.“Has he seen this film?” “Yes. He _______ it several days ago.”
①  saw
②  has seen
③  had seen
④  was seeing
【单选题】 3.A hunter is a man who animals.
①  catch
②  catches
③  will catch
④  was catching
【单选题】 2.She the door before she goes away.
①  had locked
②  is locking
③  has locked
④  was locking
【单选题】 4.What if I drink this?
①  happens
②  is happening
③  will happen
④  is happened
【单选题】 10.Now Mike isn’t here. He _________ Mr. Green’s. Perhaps he _______ back in a few minutes.
①  went to; is coming
②  has gone to; will come
③  has been to ; will be
④  is going to; has come
【单选题】 6.Look out! That tree _______ fall down.
①  is going to
②  will be
③  shall
④  would
【单选题】 8.They can’t leave until they ______ their work.
①  did
②  are doing
③  have done
④  has done
【单选题】 1.When I saw Mary, she on the piano.
①  is playing
②  plays
③  was playing
④  played
【单选题】 7. My uncle __________ to see me. He’ll be there soon.
①  comes
②  is coming
③  had come
④  came
【单选题】 14.They ______ lunch at home every day.
①  have not
②  didnt have
③  dont have
④  have not any