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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

Multimeter show phase to neutral volt 230 the per phase but phase to phase 415 not show 460 why.


1 4408

What happens if we run alternator on under frequency? 



What is the reason that the humming sound is coming from the induction furnace panel?

SKS Microfinance,


40 HP motor how many square mm size wire use for stator to motor & aluminium wire use ?


1 3008

Why capacitor is blow when I am starting motor ?

1 3044

What is ignitor and why it is use in Hpmv lamp ?

2 6276

What mean power grid fail. why power grid fail.

Intas, Tech Mahindra,

1 4203

Can anyone please provide me details of MCCB/Contactor/SFU rating calculations for a motor feeder..for example 50 kw.. not from type-2 cordination chart. i want manual calculations..


lenz law application and define


If we have use two power cable for incomer, that time how many use cbct for earth leakage protection? 1 or 2 if 1 way? If 2 way?

REM Electromech Pvt Ltd,


how does grading rings & spacers in transmission line works? Working Principle?


why Square root 3 used for three phase?

2 4470

How Grading Rings & spacers in transmission lines works?working principle?

1 3166

how is calculated the quantity of weight in hot test xlpe?



I have 3 1000 kva single phase transformers and I wish to replace them with one three phase transformer. What is he kva rating of the new three phase, is it 1000 kva also or 3000 kva.

Central Moloney,

5 5722

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Un-Answered Questions { Electrical Engineering }

can you send me the placement papers of electrical engg. from companis like NTPC,DRDO,IOCL,HPCL,BPCL etc.?If,plz send as soon as possible.Thanks.


why does a dc machine has high efficiency while working as a generator than as a motor ..


How phase displacement change in the over current relay coils.


how many types of motor can be used in washing machine


If SFU is Switch Fuse Unit, What is the expansion for FSHF in Electrical Engineering?


1.dg on load alarm/stop alarm... 2.dg on load. piu alarm alarm kaise chek krte hai


Which device of PlC does share load between DG sets when DG are running in perallel?


how will reduce the voltage. if 12volt/250ma transformer toreduce 6 volt


why chock were used in old tubelights but are not newest tubelights?


sometime battery charged and then automatically charged when rectifier ON conition, is there any chances please clarify the same.


and gate circuit diagram,amplifier circuit diagram


what are the possible reaons & remedies if resistance of NGR getting heat up


please send me jindal previous aptitude and technical question and email id is


why would the rotor rotate at sub synchronous speed against the direction of rotating flux when d rotor of 3 phase IM is connected to 3 phase balanced supply and the stator windings are shortcircuited ??


what is doubling factor in making current of a breaker?