Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is ferranti effect?

9 9248

what is the difference between online & offline caliberation of KWH meters. Can Digital meters be caliberated

758

How earth resistance reduses by pouring water coal and salt?

4 18543




what is the long transmission lines

2 2285

transmisancy eficencey calculation formula

1 1989

what is PI value and its significance for insulation testing?

3 21338

How the main bus bar rating of 400kV switchyard with one and half breaker scheme is calculated.

2 7112

What is stub protection is all about?

1 4655




WHAT IS THE THUMB RULE FOR DECIDING THE CURRENT RATING OF COPPER WIRES SAY 2.5/4/6/10 MM SQUARE SIZES??

Dubai Group, Savitha Electricals, Saudi Delta Groups,

14 52306

What is the thumb rule for calculating the P.F correction Capacitor?? Say for 100 hp motor how much micro farad Capacitor is needed .... Thumb rule so quick answer wanted

Bhel, Dubai Group,

9 15133

WHAT IS THE DIFFERENCE BETWEEN SHOP DRAWINGS/ DESIGN DRAWINGS AND AS BUILT DRAWINGS??

Dubai Group, ECEC, ACC, Al-Jaber,

2 25587

we hav seen in electric engine of trains only 1 wired slidng conecctn is there frm ovrhead line,howevr to complete a ckt in dc postv n negtv two conection has to b there...so where is tht negative is been connectd or where it is grounded...?

ABB,

5 4185

how to select short circuit current while selecting a MCCB? how to calculate current for a given KVA and KW load?

GE, PnU Engineering,

2 15382

in a three pin socket y the pin of earthng is longer n bigger...?

2 1621

What is the safety protection? Name the protections of Transformer?

HSL,

1 4276


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Un-Answered Questions { Electrical Engineering }

howmany electrician should maintain for a 1000 kva used plant... in kerala..

846


How o select the electrical fuse?.What are its characteristics.How to select the material od fuse?

747


how to carry out Magnetizing Current Test on Distribution transformer and what purpose we are doing this test. why transformer rating in always in KVA ? what ispositive, negative, zero sequence impedence? How ElCB tripping if Neutral touch with ground Why AC & DC capacitor are use in UPS ? why motor rating in KW? how to syncronize two dg sets

900


is it possible to say motor horsepower number without seeing name plate(when name plate damaged)

822


Where burned of electricity,when,who, & why.

744






HOW WE CAN REDUCE THE CIRCUIT COMPLEX OF STAR-DELTA STARTER .BECAUSE NOW WE USING ONE TIMER RELAY & THREE CONTACTOR FOR MAIN,STAR & DELTA ?IF ANY IDEAS PLZ POST.THANK U

1289


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

632


Why have to use copper cable for local isolator to motor ?

899


please explain how to do 'pole drop test' on generator?

1571


our factory is going under construction mean time transformer 1000 kva 2 nos &load break swithch 12 kv & 4 nos 750 kva 2 nos & 380 kva 2 nos generator to be errcted.how to arrange earth pits &how to earth connect & neutral pit how to calculate in earth bit size.

912


Explain Need of a starter in a dc motor.? Also explain any two starting and speed control method of dc motor?

453


what is electrical machines

1818


what is the ckt diagram of a tubelight and is it the simplest ckt of electrical engineering and also the component?

926


what is meant by poly phase induction motor ? how its operating by single phase or three phase?

953


1)What is a Triode? What are its uses? 2) What is a Triac? 3) What is a Thyristor?

1242