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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

What is the diameter of electromagnetic field around a 11000/415v transformer ? Dose it affect people who live 3-4 meter beside it?

2080

Why 50hz and 60hz frequencies are used by the world, why they are not taking 55hz?

3 8392

what will be the magnetizing current in the testing of 27 MVA transformer?

1 4548

when we start the tube light, then it takes initially 1100 volt, after glow it takes 120 volt?(when we give 220 volt a.c.)

3 6474

how many testing is necessary for 27 MVA transformer?

1 2332

why does the time taken for fuse to melt is longer as the wire length increases?

1 3705

PLEASE INFORM ABOUT THE IDEAL TEST RESULTS OF MAGNETIC BALANCE TEST OF TRANSFORMER 33/11 kv DELTA-STAR T/F

2177

what is meant by phase &line voltage, how its differ from each other ?

5 12662

what is synchronizing panel & its working.

3 8369

One of our gas turbine generator unit "1st stage rotor ground fault" alarm was occured several times. we tried to measure some voltage vulue ground fault protection relay (UNS3020a made by ABB and we measured the value of: Ground: 0.9VDC 5V: 5.8VDC 24V: 23VDC u+: 300 – 350mVAC Rf1: 17.5mVAC Rf2: 17.6mVAC The unit still running and the alarm was reset. As of 6pm yesterday and unitl now no alarm happened again. I our protection relay was defective?

1 4403

Is a DC Transformer Possible? if Yes, Then Why, if not Then Why?

9 18403

when meggering a 3ph,480v oil reservoir heater on a regen gas compressor, why do I get a reading to ground when meggering phase to ground? shouldn't it read opened or is there something that makes it read closed? on the same heater, when ohming, it reads open. thanx

1 5321

Please give me the formula stating relation between AC & Dc.

JP Group,

2 8419

how to stop oil leakage in power transformer.

APGenco,

1 5798

what is meant by vector group in transformers? wy we r using that?

1 4773

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Un-Answered Questions { Electrical Engineering }

For group 1 , 2 whather i have to prepare my technical or general studies etc? and im graduate in ee engg. for wht posts im eligible for? please tell me!

2145

does the Trivector Meter of three phase automatically takes care of the low power factor and gives the reading accordigly or it does not take care of the Power factor while giving the readings please explain

1864

how to decide choke rating for drive?

2274

what is the power factor used by the PHCN in nigeria? 2. what is the difference between an alternator and generator. 3. Generation of poweris in KV but how is transmission is in MW. 4.If the transmission of power is 20,000MW how can it be increaesed to 80,000MW

8572

Why an ac solenoid valve attract the plunger even though we interchanges the terminal? Will the poles changes?

1169

WHY THREE PHESE SYSTEM VOLTAGE APPLIED IN 440 VOLT

2288

Graphs of measuring power and speed on dc motor

1927

what is the main parts of transformer? how it is functioning? pls giv the ans briefly.

1921

what can be the causes of capacitor start motor having a higher current that its actual

1933

What si the d/f b/w KVA & KWH, kvarh & kvar, kwh & kvar phase voltage & line voltage

6097

- two pumps must work with them at the same time but if the first pump start the second pump must delayed for some time to start also , with motor rated power = 90 KW and rated voltage = 380 V and rated power factor = 0.85 lag please draw the power and control circuit for it and determine all circuit components parameters that you use it

2699

What is EMC filter in VVVF Drive ?

2688

what is saturation kit?which use above 15 kw motors panel side.

4154

How to calculate of maximum demand if given 628kw, 785kva, 0.8 p.f.

1603

Define characteristics impedance?

1083

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