BARC INTERVIEW QUESTIONS 5

  

 intvw questions for eletrical stream

hi guys....

i m jaslin frm hyd had my intw on 8th of july

n here the intw q ????

 posed to mewats is ur prepartion 4 intwans 

n/ws ,

ps ,

mncs,

tr lines

,mesurin inst

1 draw single line diagram of powr sys n giv the ratings asumming medium si power sys

2 y is hv transsion preffered.... i said to reduce i^2r losses

3 replace i with v/r nw los is proportional to v?????

4 what probs r encountrd with hv trnsmsin

5 what is skin effct xlain every single point the phenomena

6 whats corona..... y does it occur n significance

7 draw d vartion i didtribution of currnt du 2 skn effct

8 prv dat power mesrd in 2 wattmtr = 3 watmetr

 9 deriv w1 w2 in 2 watmetr metod

10 a ckt was givn n asked to find current in the neutral

11 3 cts wer conected in the ckt one was in 1 phase 2nd in 2 phases... 3rd in al 3 phaseswat r the sec currnts in the cts

12 xplain the wrking principle of transformer as they donno n e thing abt that n u hav toteach....

13 wats d condi wen recing vg i>>send vg(ans ferranti ) xplain he vectr diagram

14 if t/f core is cut wat i sthe effect on flux

15 if load is incresed hw load cureent increses frm suppli

16 if another coil wit dc xcitation is added wat will b the wave formdraw all the wavforms of flux frm the fst question

17 draw wav frm shwin variation of effcncy with load current

18 wat is the condition wer eff is max

19 deriv d condition for max effiency.

..

20 deriv xpresion for efff 

21 derive condition for resonance in seriesrl n shunt c ckt

22 shw d variation xl,xc,r,pf,vl,vr,vc, w r t freq n marlk all the salient points in series ckt

23 draw torque speed char of 3 ph ind moto n mark all the salient points n wats the torqueat synchronous sped

24 wats the respnse of second order diff ckt for step input

25 5 types of wvfrms r gvn if these is the wave of the input current wats the sec emf 25 cnvrt 3 ph to 2 ph without scot connection....

26 wat is y11.y22

               n sum other questions lik this on sum other topics

my advice is jz dnt go thru bits b perfrct with the conceps n u r even

 asked to deriv n pruvthe relations so it is bst to b prepared with the 

derivation n concept of the subj....n e hw the panel willl b very fndly 

n suprtiv nnn they r ther to c wat do u knw rater thanto fnd wat u 

doonnnoso go with a ositi v atttitude nnnn the main thing is that even if

 u frgt u r gvn hints if catchup with that den the points r in ur pokt...........

the very imp thuing dey luk 4 in the candidate r willingness to solve the

 gvn prob n zeal 2knw new things nn it will ftch u gud pointsss.......n reg

 my intw it lasted 4 2 hours bt i enjoyed it...it was the bst intw i ever had.

.....after dat i wa askd to wait outside after 5 min they gav a bell n the 

respectv person wentinn n came out with medical slip n said congratulation 

u r innn........ther after we wer takn 4 maedical testsson tht day around 35-40 members wer tther n onli 2 gals including me... wer slctedso guyss..... al wat

 it needs is basics... basics....basiccs ....n basicssn little mixture of 

confidence ur intereset n all stuffff................................

so guysss alll the bst....

 n do welllll............................