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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is the procedure for erection of a transformer

TCE,

1 2814

what are the differance between neutral and earthing?

3 4303

how to select the rating of neutral ct with reference to transformer secondary current(in power transformer,stepdown tansformer,for example2000kva,11kv/415volt

ASD Lab,

2 5065

Why transformer rating in kVA not in kW?

ABB,

5 4838

How to calculate Maximum Demand from Energy meter Reading.

Etisalat,

1 13419

What, in the construction of a transformer, controls KVA? For example 600/208/120 V transformer can be 10kVA or 45kVA!!! What do we change in the construction of a Transformer in order to change the rating but not the voltage.

1 1327

how Local Breaker Backup relay working?

1 3234

What is the function of a capaitor in 1-phase IM?

1 2337

Is there any capacitor in 3-phase IM?why,xplain.

2 1615

How will you utilise electrical power? You can start from the generating station.

1033

400Kv,can it be generated?why?

2 3023

What is domestic transformer? Draw the connection of domestic transformer.

1391

Tell me the reason of connecting domestic t/f primary in star or delta,and also secondary side.

1093

How supply comes to your home?

3 3661

Draw transformer phasor diagram.(full load,no load)

PowerTech, Trine,

3262


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Un-Answered Questions { Electrical Engineering }

when will be the iocl interview results ifaced the interview on september 8 th

1142


what is mean by kneepoint voltage? when it will happen? ( my doubt is, if CT secondary is open means ct get saturation or blas? what are factors are required for calculations? plz give currect anws:

1014


what is ps impedance test

1203


thyristor controlled APFC panel design parameter?

917


wht is embedded systems? what is new inthis field?

1044






How do the synchronizing lamps indicate the correctness of phase sequence between existing and incoming alternators?

1005


why steady state stability limit is greater than transient stability limit ? How it can be explained ?

1851


if two transformers are placed parallel & both have fault impedance of 50KA will it increase or decrease show example?

1126


I just purchased a 4 position cam switch to be used to operate a 3-speed blower motor. The motor is a 10 amp motor and has 3 wires that are used to control speed. The cam switch was rated at 660V 20 amps but when I received it, I noticed that it has AC-15 operational current rating (Ie) of 4/5 amps. If I am reading the label correctly. the 4/5 amps is related to 440v/220V (Ue). Other ratings are AC-3: 5.5A, AC2: 7.5A and AC-4: 1.5A. My questions are 1) Is it safe to use this switch with the motor I have 2) what is the difference between the 20 amp Ith ratting and the Ie operational ratings?

763


Explain the operation carried out in thermal power stations?

196


define as synchronous generator

1256


why we use circuit breakers for switching instead of normal switching device?

1004


Why does the adjacent zone of protection overlap?

205


what causes contact chatter when there is no demand on the air conditioning unit?

1133


can any tell me why slope 40% and 80% is calculated in differential protection?

1025