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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What is a transductor ?

2 4573

Which is the best protection in case of shortcircut fuses or mccb ?

2 3934

I need a 33/690V Dry type transformer.How to select IP class for this transformer.This will be an outdoor transformer located in a highly polluted environment.

3 3924

why ground clearance of EHV line is more than HV line??

2 3973

How Id and Ires are calculated in siprotech 7ut612 and abb trsfmr differential relay.what is the formula

1 2555

What is the minimum percentage of power that a powerplant can support in ilanding mode ?

1 2128

what happen if any one phase of a slipring induction rotor winding is open?is it start or won't?

Aurobindo, Hetero,

2 5046

why make protection 85% of winding?

1 2477

What is the basic difference of turn ratio & transformation ratio for a transformer?

IGT,

8 31748

some ac motor's direction get change dueto ghanging input to the ac drives.(say ryb to rby). but some motor direction remains the same when phase sequence is changed fromdive side. can anybody guide me?

1 3769

whatdo mean by chopper fed drives.used for ac drives.

1363

There is one 40MVA oil cooled transformer (yet to commission), filled with 95% oil and we are trying to fill 5% Nytrogen in that transformer so that there should not be any foreign component inside. But even though there is no leakage, nytrogen is not withstanding inside transformer, within a day or two pressure guage is showing 0. Why is it soooo? Pls reply.

1 2648

What is the use of Surge Capacitor in LAVT?

Snipe Engineers,

1 12494

What is the difference between MCCB & MOCB?

1 8437

In our domestic single phase line if you don't have a ground connection (earthing)how will you separately use earth in a specific power supply board.

1 2580


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Un-Answered Questions { Electrical Engineering }

Is any AC drive(VFD) had a feature of DC injection braking? if available please mention the detail. i.e drive can supply braking torque when the motor in idle state.

1466


In parallel operation time both NGR’s close or not close if both close what will happen

3068


how invertor convert the dc into ac give brif detail

1368


what is the reactive power what is the use of it in system

1453


how to select automotive wire by mathematical equation with given current, vlotage and resistance

1733






What will be the voltage regulation of a full load and 0.80 power factor lagging load transformer when a two winding single phase transformer has a voltage regulation of 4.5% at full load and unity power factor?

589


when we decide to use soft starter drive or vfd drive in mcc to operate apump?

1392


Is there any reason that we get shock on touching phase wire because the earth is at neutral potential? Is there any reason that the earth is at neutral potential because the neutral is earthed in apower station

1389


how to check three phase motor torque value?

1577


Do Phase angle measurement have any application in freq/harmonics measurement? If so how?

1288


I WANT TO INSTALL LIGHTING ARRESTOR ABOVE 20 FEET HEIGHT INDUSTRIAL BUILDING. NOW IT WAS 15 FEET HEIGHT HOW MUCH DISTANCE IT WILL COVER & HOW TO CALCULAT THE DISTANCE COVER BY THE ARRESTOR

1330


describe the constructional features of an auto transformer and its principle operation

1629


electrical ques

1512


How are load losses and no-load losses measured at site in a DG set?

1139


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

1160