【判断题】【消耗次数:1】
直流电机励磁绕组不与电枢连接,励磁电流由独立的电源供给,称为他励电机。
正确
错误
参考答案:
复制
纠错
相关题目
【单选题】 直流电机有几种励磁方式().
①  A.1
②  B.2
③  C.3
④  D.4
【单选题】 下列励磁方式的直流电机不能空载运行的是___。
①  串励
②  并励
③  他励
【判断题】 下列关于电机反转,只要串励直流电机,改变电源正负极性的连接方向,就可以实现电机反转。
①  正确
②  错误
【判断题】 直流电机换向极绕组与电枢绕组串联。
①  正确
②  错误
【单选题】 直流电机电枢绕组元件中,电动势和电流是( )。
①  直流的
②  交流的
③  交直流并存
【单选题】 直流电机换向极绕组与_________。?
①  电枢绕组并联
②  电枢绕组串联
③  并励绕组串联
【判断题】 直流电动机有他励和自励励磁方式吗?
①  正确
②  错误
【判断题】 直流电机电枢磁密波形为平顶波。
①  正确
②  错误
【判断题】 起动直流电动机时,励磁回路应与电枢回路同时接入电源。
①  正确
②  错误
【单选题】 直流电机的气隙磁动势是由()产生的
①  励磁磁动势
②  电枢磁动势
③  励磁磁动势和电枢磁动势
随机题目
【单选题】 A: Have you ever been to Huangshan? B:[填空].
①  No. Twice
②  I went there twice
③  Yes. Twice
④  Yes. Ill go there next month
【单选题】 A: Is there a bank near here? B: [填空].
①  Its very far
②  Its here
③  Yes, there is a big one
④  Its very crowded
【单选题】 A: David injured his leg playing football yesterday. B: Really? [填空]
①  Who did that?
②  hats wrong with him
③  How did that happen
④  Why was he so careless?
【单选题】 A: How are you doing?B: [填空].
①  Good night
②  Not so bad. And you?
③  I m pleased.
④  How do you do?
【单选题】 A: Would you like me to feed your cats while youre on your holiday? B: [填空].
①  I appreciate it, but Ive already fed them
②  No problem, I was more than glad to do it
③  Thanks for offering your help, but my sisters going to do it
④  Certainly, feeding cats is my favorite pastime
【单选题】 A: I missed yesterdays basketball final. B: [填空]
①  What a pity!
②  Its a good idea.
③  Remember to bring it next time.
④  Im glad to hear that.
【单选题】 A: May I use your dictionary for a moment? B: [填空].
①  Its well
②  It doesnt matter
③  By all means
④  Here you are
【单选题】 A: Are you feeling better today? B: [填空].
①  There must be something wrong
②  Just have a good rest
③  Yes, thank you, doctor. But I still dont feel good
④  Dont worry about me
【单选题】 A: How about going to dinner at the Mexican restaurant tonight? B: [填空].
①  I like Mexican food
②  Id like to, but I already have plans for tonight
③  Forget it
④  I dont know
【单选题】 A: Bob, [填空]? B: Thats my friend! And beside him, his partner.
①  what is the person over there
②  whos talking over there
③  what are they doing
④  which is that