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Electrical Engineering Interview Questions
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In case of a synchronous generator carbon brushes, some brushes expire before the others. Why is so? When all the brushes are installed at the same time, why don't thee expire at the same time?

1 1652

Grounding. Dear all at one of my site we checked the amps at the earthing cable to the alternator it was found 125 to 130 A. at the neutal cable in same machine found 146A. in the same plant checked the earthing current on other alternator it was 52A, and neutral 116 A. we are facing problems with our controller and the card was damaged once. can that neutral/GND current be a reason? as there is common grounding for the Alternator,Brkr panel,Transformer?

2 2387

can anyone send me some sample question regarding power grid corp


what is difference between power transformer and distribution transformers

1 3774

Seamless tubes are made by?


5 7757

what is the difference between earthing and unearth

Apple, NTPC,


in VFD when freq is reduce the voltage will reduceor not if it will reduced upto ...

8 6029

Why capacitor bank is not neccessery to switch on,pls answ me with formula

2 3014

why ct mensioned 0.5/5p20 plese any reply to me

2 5606

Is there any Institution for giving M-tech in Electrical engineering for those who r in service? Give the details please.

CB&I Lummus,


what is the difference between interconnection and intraconnections in the circuit diagrams



Explain the laying procedure and laying depth of submarine cables under sea?


1 2715

how work a harmonics filter(L-C combition).


1 1208

how can I calculate charging current of cable/overhead conductor? what is roll of voltage in it ?


how can I check HT cable ?

2 4517

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Un-Answered Questions { Electrical Engineering }

If symmetrical fault occurs at the terminal of a synchronous motor then how the motor will act...explain it..


what is the effect of earth on capacitance in 3-phase and 1- phase transmission line?


what is the difference between fault current ant short circuit current?


how the aircraft outer body and inner body is separated ?


11 kg trivevter meter has rating of -/5amps. And pt ratio11000/110v and is connected with 11kv ct/pt unit of cr ratio 75/5amps. And pt ratio of 11000/110v while checking accuracy of meter with HT Accuchek meter what value of PT ratio and CT ratio to be filled in Accuchek meter


What is BusBar integrity test and how it is conducted?


What is the meaning of loop in transformer


How to calculate multiplication factor in kva example 500kva ans pls ?


how dia of wire and angles are calculated for overhead shielding wire to protect substation equipment from lightening strokes???


what is an unbalance in acircuit? in a three phase 3wire circuit how an unbalance will come? in a three phase four wire system how an un balance is coming?


wow to calculate the transformer rating(KVA)


Salient pole alternator is more stable, why?


how invertor convert the dc into ac give brif detail


which metal is use in shunt


im working in one private compeny in gujarat. i was complet diploma electric in 2010 from gujarat technical board. now i want electric supervisor licence in gujarat but i dont't know when i apply? plz give me address of the licence dippartment office in gujarat. gandhinagar