Electrical Engineering Interview Questions
Questions Answers Views Company eMail

Can the Neutral and Body Earthpits of a transformer conncted together by Earth strips under ground.

4 9016

What is the battery voltage limit

3 2331

How much load with stand the copper cable by sq mm apro..

L&T, Taj Group,

1 2866




why use generator Earthing/Graunding.

4 5556

what is earthing.how we make it,describe briefly.

HAL,

1025

If one 10 Hp 3phase induction motor connected in 380volt 50Hz. and again its connected to 380volt 60Hz. howmuch currrent and power take on both time?????

1 3195

how to calculate AH of a battery?

Exide,

8 30519

define digital electronic

713




Can any one explain me about 2 phase motors ?

L&T,

2 2984

What is the difference between Isolator & Load Break Switch?

Infotech,

7 36473

does a DG set has low fault level as compared to that of a transformer.If yes then why.

616

what happenes if the core of the transformer saturates?

4 4823

1.In two wattmeter method if one wattmeter shows Negative reading then wat is reason? 2.Wat is the reason for low voltage in houses? 3.Wat is meant by current and voltage? wat is difference between the two?

Engineering,

9 38460

what is the easiest method of short circuit current calculation ? pls. derive with a mathematical example in real life application.

Mepax, NEPCO,

1160

how to calculate the no. of earth pits required for an electrical installation?

Mepax,

1 4233


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Un-Answered Questions { Electrical Engineering }

FEINGING DECREASES THE FLUX DENSITY IN THE AIR GAP. HOW?

724


How to know vacuum in vacuum cylinder of breaker in working condition

546


what is difference between 5A and 100A CT constructional wise and operation?

1686


what is the necessity of under ground cables ??

672


Define end float in a motor?

4455






why the pf of semiconductor device is improved the electrical devices

542


we use capister for power factor. when we use capaciter in dg circuit  than defect dg. can we use capaciter bank for dg circuit

452


Minimum IR value of 1.1 kv grade 3.5c (300, 240,185,150,120,95,70,50,35,25) sqmm Aluminium XLPE cable and 4c (16, 10,6 & 4) sqmm cu arm cable between RY,YB,BR,RN,YN,BN,RE,YE,BE & NE.

1727


i am an maintenance engineer. one distribution board have 5 feeder. recently its ELR trips frequently, but it take some times after trip( 10min,20min..)but 3 feeder no load. two feeder only loaded. i checked one feeder IR value all values are above 50Mohm.but B phase to Earth is only 9Mohm.any problem about low value

525


we have a rewind motor of 2Hp,2800Rpm, 220Volt AC. how can we choose the running capacitor for this motor, any formula for that?

568


12.5 tons a/c is their how much kva generator can recommend to the customer.

638


what is the ms flat constant for calculating earth mat design calculation?

1164


Role of active and reactive Power sharing in between two synchronized Generators, Droop Setting role ?

547


How to calculate KVA/VA rating of PT or CT from primary & secondary voltage or primary & secondary current?

1089


pls tel me the electric train traction motors name plate details like rpm,torue,voltage,amps,watts..ect..

733