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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

who is make controlling in the reactive power that genarted in AS genrator(the exitaion currnt or exitation voltge)

 2 3340

do you have some of interview Questions in power and genrator section in general whith answers

 1628

why we are using the ac supply in domestic purpose, why don't use dc supply.

 5 6449

transform oil how going to act like ainsulation purpose

Siemens,

1 3323

What is principal to reduce earth leakage current with isolation transformer? When isolation transformer is installed in input stage of system, earth leakage current is reduced. the reason is why the leakage current of 2nd stage of isolation transformer does not affect the 1st stage's leakage current. I would like to know the reason. As you know, earth leakage current is a kind of AC. So, How to reduce earth leakage current in case that isolation transformer is used?

 2 9406

what is difference of electrical and electronics

SSIL,

6 5854

why we are using the ac supply in domestic purpose why don't use dc supply

Airtel, SSIL,

6 14665

we are operationing 3NOs 800 Kva generators by singronyus.specialey evening time our panel trip. the panel showing generator earth fault

RRB,

4 5542

star delta starter single line digram

 1 6072

in transfomer which type of oil is use!

Essar,

9 9019

What are the protections required in the main lt panel which is connected to the transformer.

Ispat,

1 2264

what is the difference between ac drives and dc drives?

 1 3196

Why is DC use instead of AC for protection and control circuits?

 4 7346

What is the difference between Earth and Neutral?

 2 4631

why there is a humming noise in transformer

 6 6940

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Un-Answered Questions { Electrical Engineering }

-What should be minimum value of insulation resistance and maximum value of earth resistance at any electrical instillation and what is method of testing the same.

1563

Calculate torque developed by the 3-phase, 5 H.P., 4 pole induction motor runs at 1500 rpm A 23 N-m B 21 N-m C 10 N-m D 0 N-m

4328

why dc is used in control circuits for MV & LV switchgeras instead of ac

1462

Why we are using only Dyn11 tranformer in distribution system but not using a Dyn1 in distributing system?why not and advantage and disadvantage in both

2309

If the line voltage is reduced to 75% of its rated value then by what percentage current will reduce ?? 75% 25% 50% no change and why ?

1734




how to calculate short circuit current for the busbar

944

What is meant by short-pitched winding?

645

explain the function of brush less dc motor?

1570

HOW TO CALCULATE THE HEAT AND LOAD OF LT-SUBSTATION WHICH CONTAINS 2*1MVA TRANSFORMERS,LT SWITCH BOARD,MLDB,ACB,BUSBAR,ETC...?

3478

What are the various types of rotor used in the alternators?

609

PLZ EXPLAIN THE INTERLOCKING AND CONTROLLING OF CONTACTORS????HOW CAN I DO THAT?

5716

What are the advantages of a three-phase system over a single-phase system?

622

What is resistance reading of earth copper rod with grid and without grid?

640

Can anyone explain me about the RLC based Impulse high voltage generator and how to and operation of Series resonant High voltage reactor...?

1415

What is miller crystal oscillator? Explain its operation?

662

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