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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

is power factor correction related with vector group of transformer i.e:Dyn11?

1 4165

why the the electrical machine coil are damage ? How to prevent it?

2 4430

in wind mill use 2100 kw asychronous generator ( induction generator ) rotor voltage : 3300,stator voltage : 690, rpm : 1511 type : MRL063E04 ' we check rotor resistance magger value found following. R-EARTH - 00 M.OHM,Y-EARTH-34 M.OHM,B-EARTH- 33M.OHM R-Y: 31 M.OHM, Y-B: 00 M.OHM,B-R :33 M.OHM HOW CAN I TAKE DECISION?pls ans. quickly

Shaifali Rolls,

2259

A 12.5 hp slip ring motor taking high initial current and its MPCB is getting open.what may be the reason?

3 5264

What should the transformer connection of a 11/220 kV step up and 66/11 kV step down transformer ?

CGL,

4 8042

What is the function of the circuit breaker failure relay?

2335

What is the function of the auto reclosure relay?

1 4958

in transformer star connection with neutral are shorted. is there is any effect.

1 3484

for a machine R=130 KVA Y=132 KVA B=144 KVA Then what will be the total kva

ABB,

3 6212

why insulators are colured in brown only?

Transco,

3 6609

How does solar power system work?

1 3795

what is mean by NPS (Negative phase sequence)fault? what is the difference between EFR & OCR faults?

TNEB Tamil Nadu Electricity Board, Vestas,

2307

What is the criteria in selecting Air circuit breaker(ACB) & Moulded case circuit breaker(MCCB) for a particular range?

DLF,

3 8264

Does the ELCB or RCCB trip when it is connected to a primary side of a welding transformer?

Tata Motors,

3 9993

how much power consumed by 1.5 ton capacity split A.C in 1 hour

2 4641

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Un-Answered Questions { Electrical Engineering }

we have two motors 1250kW,6.6kV to be coupled on the same shaft ,so please provide assistance for their synchronisation.

2027

How does a battary stores charge in it? please explain in simple manner and in detail.thanks

1939

How relay coordination has to be done? what are the inputs are required for this? Please explain this with calculation method?

1754

Under wat condition statcom operates as an inductor for the transmission line?

1894

why the NGR (neutral grounding resistor) always OFF during DG off?

3437

what is RFID? thire application;

2002

what is the diference between the 4pole & 6pole DC Motors & what is advantage 6pole over the 4pole ?

1861

Name one of major transformer company in KSA ?

1154

What is the method for testing the differential protection stabilty in generator? When the time of starting What will happen if differentail protection connection wrong means?

2240

What is electrical grounding?

1100

what is R Core Transformer. how it differs from normal transformers. dont search in net and post the answer.

2046

what is the difference between Central Battery System and UPS in applications and uses? and why UPS suitable for Computers and central battery for emergency lighting?

10237

What is servo motor and what are different types of servo motor

2343

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2117

what is current check gurd relay?

2537

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