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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is maximum or Threshold value of current 7 voltage that a common man can withstand

 1 2032

how to prepare PPM schudule

TATA,

3 4632

what does the regenerative braking mean?and how it used for Dc motor? thanks.

 2 5653

would the same effect be achieved by reversing the connection to one winding of the induction motor 3-phase?

 1326

Describe the control mechanism of missile launcher???

DRDO, ONGC,

1512

If ac 230volts inputsupply to full wave rectifire what is D C output voltage.

 3 4474

we can stepdown the voltage from 230/12v ,and we use the voltage for various electronics components why can't we step up the voltage from 12/230v if we can shall we use the voltage for domestic single phase supply

Areva,

5 7373

A 11000/415V distribution transformer is fed 415V upon it's LT side,Do I get 11000V upon it's Primary side ?

 7 12298

For having nonavailablity of 10 Amps fuse, a lineman replace the same with 5Amps two strand, Do he correct ?

 4 5299

What is the difference between Analogue Addressable Systems and intelligent Addressable Systems

 1 5058

at the time of starting back emf of a motor is zero.so how can it will start to run??

 1 3103

why we have to do tan delta test of the transformer oil???

 5 16534

How to choose primany and secondary side MCB

 1 2289

why firewall is build up between two transformer (220/11kv,50MVA)?what should be the firewall height?what is the clearance between firewall and transformer?

Siemens, Tous Stadt,

2 16545

In a Synchronous generator, Can AC voltage be used instead of DC voltage in field winding of rotor to produce AC power?

NTPC, Windia,

10 16574

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Un-Answered Questions { Electrical Engineering }

Why we find the sensitivity for the CT's to check?

1406

Why are iron cores in transformers made laminated?

652

whats the application of voltage regulation? and whats the voltage regulation's device?

1402

My question is whether bellow formula is correct to find bus size for 46kA for 0.5 second & what is RT in bellow formula. formula to calculate the size of busbar to withstand the thermal stresses due to currents with duration of 0.2 sec to 5 sec. Sp = RT( I x I x t) / K Where Sp – is the cross sectional area of bus bar in millimeters. I -    is the value of AC fault current. t -    is the operating time of disconnecting device in seconds. K –  is the factor depending on the material of the conductor, insulation and initial and final temperature. Value of ‘k’ for copper is 143.

1439

What is the working mechanism of OLTC in Power Transformers????

3882




Dear friends, i would like to know that what is the exact function of 'exciter winding' & 'aux winding' in Alternator?

1435

I want the details about BHEL company examination.Can anyone able to help me please.

1589

What is the test block protection relay if any body know plz explained

1008

what is the clear formula to calculate cable size for a load

1469

Why do you have to use Protecion relay with the function MTB ( Mechanical Trip Button ) for electrical system.

1684

How much earthing frequency is capable?

1572

design a 3 bit synchronous and asynchronous counter using T- flipflop

1568

How you give clearance to a spare feeder.

1210

How to arrange a hous hold earthing system to keep minimum earth resistance( below 7ohms).

1706

grr resistance & contrator malt continuous

1664

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