98鐵路佐級 電機機械 - 考試
By Hedy
at 2013-06-01T18:49
at 2013-06-01T18:49
Table of Contents
今天寫了這一年考古題,我覺得我的電機機械好像都白讀了~
被這一年的題目打擊不少信心......
而且一小時,我真的寫不完,其它年的題目至少都還有時間檢查
不過我還是要問一下幾題!麻煩各位版友了~
第一題
http://ppt.cc/ZMHJ
答案為(C)
這一題我的問題是I的均方根值是多少?詳解算出0.5657不知道怎麼算出來的~
另外,我知道有效功率是P=I^2R
問題是平均功率沒給功率因數值要怎麼求呢?
第二題
http://ppt.cc/d-8F
我的問題是"無載時的轉速"要怎麼求?我筆記沒這公式~
第三題
http://ppt.cc/iFcd
這一題的問題是,算低壓的電阻,阻抗值,一定要從高壓慢慢推過去算?
而高壓的阻抗值卻可以直接帶現有的值去算,不用從低壓推過去?
哪邊可以看的出來?
其實真正最討厭的是22題,23題這題目,感覺跟基電有關,但基電這部分我也超討厭...
麻煩各位版友幫忙解答,感激不盡!
--
被這一年的題目打擊不少信心......
而且一小時,我真的寫不完,其它年的題目至少都還有時間檢查
不過我還是要問一下幾題!麻煩各位版友了~
第一題
http://ppt.cc/ZMHJ
答案為(C)
這一題我的問題是I的均方根值是多少?詳解算出0.5657不知道怎麼算出來的~
另外,我知道有效功率是P=I^2R
問題是平均功率沒給功率因數值要怎麼求呢?
第二題
http://ppt.cc/d-8F
我的問題是"無載時的轉速"要怎麼求?我筆記沒這公式~
第三題
http://ppt.cc/iFcd
這一題的問題是,算低壓的電阻,阻抗值,一定要從高壓慢慢推過去算?
而高壓的阻抗值卻可以直接帶現有的值去算,不用從低壓推過去?
哪邊可以看的出來?
其實真正最討厭的是22題,23題這題目,感覺跟基電有關,但基電這部分我也超討厭...
麻煩各位版友幫忙解答,感激不盡!
--
Tags:
考試
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