Electrical Engineering Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

WE know that for Inductor X=2pifL,In DC f=0,then X=0 so,V=IX=0;But In the DC excitation of rotor of AC generator,DC motor field coil which coils are inductor so why does not applying DC voltage short the rotor coil of AC generator and field coil of motor?If it would then DC source might be damaged but it is not happened. Why does the strand conductor of Electrical power transmission line make twist?

4323

What is the basic difference among IPS,UPS,EPS?

ABB, Navana,

2 18366

Earth leakage relay basic knowledge principle

Radiant,

2130

HOW to speed control of induction mototr using scalar control

3 5989

if one of the phase is failed to 3 phase IM. what will happen?

6 8938

how we calculate electrical load on a building according to area?

HFCL,

2726

why transformer are rated in kva.

Dalkia, Nalco,

5 8432

What are the necessary conditions for production of rotating magnetic field.

BARC,

4 9946

what is the purpose of shading ring or shading coil in electrical equipments.

BARC,

4406

what is differnce between oil transformer & dry type transformer ???????????

2 6279

Generally the incandescent lamps in bathrooms fuse due to high voltage at night.What is the simple solution of this problem?

4 5595

What should be the protection scheme for a 15kw, 3-phase motor working in a lathe machine.

2016

Why voltmeter is not connected in seris & ammeter connected in parallel ?

5 27948

why we use post insulators in no ofstacks at substation for supporting equipment ? why we not use single post insulator

3 5119

which type of cabel

DMRC,

2356

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Un-Answered Questions { Electrical Engineering }

how you taken aotitude test

2430

How REF protects transformer alone? explain with diagram.

1482

will there be any problem by recovering slip from single phase induction motors?

1826

What is effect of harmonic current (Draw by VFD) on power system/ electrical Equipments ?

2009

why the arc welding machines require parallel earthing systems? ie why each machines are connected to earth pit by separate wires during earthing? wats it adavantages?

2131

How to calculate LT XLPE CABLE for 11 kv / 433 v , 1000 kva oil type transformer system?

1861

why the earth is taken minimum in supplying? wather it the proportional factor to getting work any equipment or a power plant?

1829

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

2017

How to calculate the sag on transmission Lines.

2920

what is the meaning of WYE and DELTA in Electric meter?

3764

how to calculate the cable current ratingand and how much of distance the rating will be ok will the distance is incresed what the action we take

2070

what purose of the double circuit transmission line phase of the line phase changed for circuit-1 for Circuit-2 R-Y-B B-Y-R

2219

How the circuit breaker is selected for Induction motor of 100 kW, 415 volt, 0.85 power factor, 0.95 efficiency ?

1552

(1)Can earth and be conected together (2) what is the diferent between earth & neutral

1744

I need the recommended size for a 3 phase transformer at 13.8 KV Primary and connected loads of 3000 kVA at 4200 volts and 2375 kVA @ 480 volts AC.

1970

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