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Electrical Engineering Interview Questions
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Why neutral cable carry current.

Tech Mahindra,

1342

please let me know , we have installed two separate motor for fire fighting system 1) 60 hp and 2) 15 hp the load is 74 AMPS and 20 AMPS then tell me the main power cable in Aluminum will be what thickness , the length is 225 mt from the main utility to fire pump house

 1 1633

area control error

 1103

why reactor is connected before capacitor in APFC panel

 2 2449

How power is transferred from one winding to another in an auto-transformer? A) electrically B) magnetically C( both a & b D) neither of above

ISRO,

3 2638

why is the size of earth conductor is half of phase conductor.

Century Pulp and Paper, L&T,

1 2817

At what speed 1 HP motor can run an electric car of weighing 400 kg?

 971

At what speed an electric car can run with 2 HP motor of weighing 400 kg?

 1112

I am doing apprenticeship training at HT switch yard in NLC. How can i get electrical c license. ??? What r the rules for getting it as an apprentice? ??

 1154

Difference between RCCB, RCBO and ELMCB.

Megatron Solutions,

3294

we have 2.2kw,Y,3000rpm motor but 6leads found in TB what happen if we connect in delta?

 1079

What the reson for frequant instantaneous ground over current fault in our sync. Generator... 15 triping in 24 hr...

HCPL, Jhunjhunwala Vanaspati Jhoola, Regen Powertech,

1 1947

Leading power factor means what? what is the power factor value while in power factor is leading? is power factor greater than one? In some cases i heard pf 0.8 leading then what about 0.8 lagging?

Rockfort Engineering,

1 1518

Can anyone explain, How will get positive to ground and negative to ground reference voltage in dc system

NCC,

1 1345

What is the minimum distance between MV busbare (P to P & P to E) as per some standards

ABB, Sejong,

1 2384

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Un-Answered Questions { Electrical Engineering }

Which test will be more severe for VCB?

2051

I need the list of Universities who have summer intake for BS degree in Electrical Engineering.?

1399

Why we used 690V in ACS 800 drives.Why dont use standard voltage like 415v or 1.1Kv

1574

excitation limit of an excitor

1342

if 6 earth pit value is 1.5 ohm then what should be the number of earth pit to make the value .8 ohm

1546




Why should be the frequency 50 hz 60hz only why not others like 45, 95 56 or anything , why should we maintain the frequency constant if so why it is only 50 hz 60hz?

478

how oltc works in rectiformers of higher rating (27 mva,200v dc,120kamps) please provide me full information with diaggram.

1521

what is formula for calculate thermal overload in new numiricalrelay( not in bimetal relay)?

1611

DEAR SIR,I GOT THE CALL LETTER FROM RRB, SECUNDERABD AS A JE-II SO PLEASE PROVIDE ME SOME MODEL QUESTION AND ANSWER PAPERS AND LAST YEAR QUESTION PAPERS

1413

HOE WE CAN IMPROOVE BY USE OF CAPACITOR

1349

What is meant by short-pitched winding?

497

how the aircraft outer body and inner body is separated ?

431

How will you define capacitance?

500

various transmission tower like .,D tower ,K.C.O tower ,C.C.O tower,K.C.R tower ,C.C.R tower ,H.C.O tower in different tons.

2295

what is integrated ac contact circuit

1474

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