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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what voltage to be select in megger for insulation resistance testing to L.V , H.T cables,motors and transfomer?and ohms valve should be giga ohms only or what?

Deevya Shakti Paper Mills,

1 12987

how can motor both beasrings insulation resistance can be check?



2.5mva transformer is installed in our company with oltc but it is not working in auto mode ,it is operative in manual mode control wiring is done how can i rectify it?


5 4426

what is the diference beteween dedicated earthing & body earthing?

1 4412

can we use 3 phase UPS for Motors and Other Machines


4 7111

how does a current carrying conductor posess a magnetic field. what is the reason for the production of electro magnetic field around the conductor

Vizag Steel,

2 5986

How to know Resistance and Reactance value of main and aux winding of single phase capacitor start capacitor run induction motor to find capacitor value?



how motor should be connected i.e star-delta or star-star or delta-delta ?


3 3645

can i used 400A SFU (for the use of PA fan motor),if my BUSBAR rating is only 315A?????answer me quickly as possible.......thanks

1 2817

what is circulating current in parallel transformer???plus how it is generated ???plz explain in detail.........

2 4014

suppose if oil in transformer is not used than what constructional change you will do,for insulation and cooling?


2 4433

why dhyedration test required for transformer oil once in a year

1 2664

EHV current carrying parts need to have smooth finish,then how can a 245kv GIS with emery finish can run so long?


what you mean by vector group of a 3 ph transformer

1 1987

can transformer of different kvas be paralled

2 3017

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Un-Answered Questions { Electrical Engineering }

if the motor rated speed is 950rpm. how to change the above rated speed? is it possible?


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


how much value of resistance should connect to 15 kw, 6 pole 3 phase slip ring induction motor having RV-240, RA-42.


what is a bus riser in power system and why it is used


does not the circulating current in a transformer affect the flux distribution in the transformer core


How to calculate earth wire load by formula


in star-delta tranformer,if the input of star connection is 400/7v 3 kva then what is the output of delta connection?


What is the loss of transformer of 220kv/11kv, 63/80 MVA and 18.05% impedance


what topics we have to concentrate for power grid et.written test.and tell what to read for english synonyms and antonyms.


What is an ideal transformer?


Dear sir, By which formula u can calculate for a particular kv line there is a range of mw.


What are the no-load losses for the 11000/415V transformer with the following rated capacity? 1.1500 kVA 2. 2000 kVA 3. 2500 kVA 4. 3000 kVA


Pls Breifly explain about UPS (Inverter,Reserve,Rectifier,Float voltage,Boost voltage).


Can anyone tell the proper diagram of star delta starter????


how to select energy meter? have any calculation?