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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

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 3049

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 4157

can anyone send me some sample question regarding power grid corp

2253

what is difference between power transformer and distribution transformers

1 5364

Seamless tubes are made by?

Bhel,

5 10956

what is the difference between earthing and unearth

Apple, NTPC,

3201

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

8 10484

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

2 5133

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

2 7480

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

CB&I Lummus,

2121

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

NTPC,

8469

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

Schneider,

1 4346

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

Bhel,

1 2692

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

3736

how can I check HT cable ?

2 6386

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Un-Answered Questions { Electrical Engineering }

give some advantages and disadvantages of combiniing the session, presentation, and application layer in the osi model into one single application layer in the internet model

2746

What is the difference between PS & metering CT (5p20,0.5 etc.)? Why in PS class CT only Vk is given ? Is PS class CT is more accurate than metering CT?

1197

What is the function of under voltage release ?

1497

how to calculate differential current when we testing differential relay..suppose we have 1000kw generator,630amp VCB,what value we should put /inject so that relay trip the VCB? PLLZ justify ur comment

1626

I have a reading off 1.5ohms at my mem my main c/b is rated at 40/6 amps in a domestic house and i was told to change it to a b curve c/b is this ok

1724

What is the maximum operating temperature for a thermoplastic insulated cable?

1188

we have an energy meter in a capacitor bank panel, So should we consider it's readings as energy consumption on daily basis. (when capacitor bank doesn't have any energy losses)

2494

What is the formula formula for Busbar sizing and what are the things to be consider for Busbar Calculation?

2645

Why different Pressure switch used in marine boiler water circulation system

1825

How to select a transformer group to connect a 0,433 KV generation with 33 KV grid in bi directional flow of current

1618

we all know voltage is a force(emf), and the force always devides if 2 or more than2 loads are there but why does the voltage remains same is parallel, it must devide na ???

2041

what is gridrotor resistance starter

1926

How wire size can define in electrical wiring? What is the ratio?

2356

difference between ac series and parallel circuit

2112

what is the Pickup/drop off ratio in BCPU relays

4711

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