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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What is the need of black rock stones under the transformer yard?

TNEB Tamil Nadu Electricity Board,

5 8590

What is the name of transformer oil?

18 12438

lightning arrester rating selection procedure: (line to line voltage(kV)/(squ.root of 3))*squ.root of 2. now the question is, IS this above formula correct for both STAR and DELTA connected system???

1 3622

I have a 25 KVar capacitor bank at my facility.How to check the capacitor bank ??

2 12832

When we use a multimeter, while checking continuity of a closed circuit , what is happening inside multimeter, how it is working to produce a beep wheather it is closed or open.. is there any internaly voltage/current source inside multimeter?

TNEB Tamil Nadu Electricity Board,

3 6365

please send me last 5 year interview questions



why are maintine power factor 0.99 in Eb line? why are used capacitor bank in Eb line? what is the purpose capacitor bank?

TNEB Tamil Nadu Electricity Board,

4 10577

who & how the notations given as RYB to 3phase power supply.

1 3182

clarify types of motor operated valves and advantages


what is phase shifting transformer.

2 3951

How to find the voltage drop for short,medium,long transmission lines of a 33kv sub-station?

1 4641

can anyone help me regarding bout Electrical designs and calculations .. which text book should i follow as i am a trainee engineer.Description of my work which is Electrical designs like cable sizing, lighting, lightning, Gensets sizing, motor sizing, transformer sizing, generator sizing, circuit breakers, PDB MCC PCC SLDB MLDB panels, Single line diagrams mainly, substation desings, cable routing and layouts, reactive power compensations, power factor improvement, voltage drop calculations, power generations, power transmission, power distributions all calculations.Please help me

3 4862

what is electrical machines

1 2731

I would like to install the largest KW alternator to a 200 amp aluminum bus box in my home. Is it possible to install a 250 KW 400v 251amp synchronous alternator to my home?

2 2620

how to measure genset CT coil range?

1 3319

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Un-Answered Questions { Electrical Engineering }

If only R Phase is connected in 2 pole elcb, n is not connected than it will work or not in ground fault.


where was current transformer protection units used and why??


In EDO ACBs what is a purpose of closing coil and motor, what is the operation of these devices are they inetconnected. means if we give supply to motor and by BCS we charge Closing coil,what exact is operation is and how it charge a spring of ACB. Sir if anybody has an wiring diagram please send me the link to operate and EDO breaker.


how much leakage current is allowed in MC61A L&T make relay?


During underground cabling in landscape area what did we cover the cable with to prevent the electric shock & protect the cable?


what is ground fault in ACB?


132/66kv sub-station procation ?


how do prepare ongc is it question model.i am electrical. which part covering in electrical.tell me


it is possible to measurement of tension of slipring induction motor(SRIM)carbon brushes, any maesuring instruments are available in the markets.


what is a pulse transformer? how rise time of pulse changes when ever the voltage changes?


comparision between ACB and VCB


What is systematic error?


how does the thyistor work in dc drive?


what is the defination of Cable database? What are the points are considered while preparing cable database? Is there any sample available for cable database?


how circuit breaker work.. what is the operations taking place inside a circuit breaker when an overcurrent occurs... is it similar to fuse?