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Electrical Engineering Interview Questions

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

4408

What happens if we run alternator on under frequency?

1233

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

1657

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

SSPL,

3008

Why capacitor is blow when I am starting motor ?

3044

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

6276

What mean power grid fail. why power grid fail.

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..

1622

lenz law application and define

1764

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?

1232

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

1199

why Square root 3 used for three phase?

4470

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

3166

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

1550

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.

5722

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.

1274

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

1094

How phase displacement change in the over current relay coils.

1505

how many types of motor can be used in washing machine

1261

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

1621

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

898

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

1157

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

1133

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

912

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

977

and gate circuit diagram,amplifier circuit diagram

1191

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

999

please send me jindal previous aptitude and technical question and answer.my email id is deep_raj@live.com

1084

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 ??

1159

what is doubling factor in making current of a breaker?

1139