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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

How will polarity test of Dy5 Transformer ?

 1627

how to remover corona effect and hysteresis losses from contactor

 1482

WHY IN WESTERN COUNTRIES THE ELECTRIC SHOCK IS VERY SLOW AS COMPARE TO INDIA.&IF ANY ONE HAVE CORRECT KNOWLEDGE THEN SEND OTHERWISE NOT

 1 3383

what would happen if u assume to insulate all the overhead lines and no insulators....??do you think it to b an advantag or a disadvantage??justify.

 3 4515

How can we increase the capacity of exixting capacitor bank??????????????? PLS. Help

 1 3108

how to calculate no load losses units comsumed by transformer

MRF,

2 6619

how many units consumed by a 33/440 2000 kava transformer in a day

Infosys, MRF,

3 8694

why do we prefer a 3-phase delta connected load rather than star connected?

 4 6152

The neutarl to earth voltage in system is 7volts on Electricity power but it lowers to 1.3volts when load transfered to DG power.what may be the reason.

 3 4363

why battery is connected in parallel ?

 7 7495

what happens if dc supply is given to the transformer?

 10 14625

why indian power system having 11.22,33 KV ???

Titan,

6 9198

What is the Gap Should maintain for HT cables crossing of LT Cable?

 2 6392

in soft starter system for 375 KW 3 ph induction motor for multi stage vertical pump, two thyristers failed causing shorting of thyrister. the motor winding failed while starting.What is the cause and what is the effect in above case

KPCL,

1 3546

what would happen when synchronous motor will operate beyond syncronous speed?

 3 4090

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Un-Answered Questions { Electrical Engineering }

how much cable size required for 70 kilowatt load.

1046

can anyone give an idea about dia calculation in cold rolling mill

1112

Why should be the frequency 50 hz 60hz only why not others like 45, 95 56 or anything , why should we maintain the frequency constant if so why it is only 50 hz 60hz?

613

Why a tesa lamp is glow between two phase?

1431

What are the site acceptance tests for power cables, DG Sets, LT panels & 30kVA UPS ?

1817




what are the assumptions made in swineburne's test?

1605

can i use 2000/5A Clamp meter to measure HT cable

1474

What is the difference between the impedance percent and impedance voltage ?

1635

We have drive feeding an output contactor for a 5000 hp motor @ 5kV application. The motor FLA is 629amps x 1.25% service factor = 786.25 amps The cable that we current have in place between the drive and the output contactor is 350kcmil- MV-105 (parallel cables). Per the NEC table 310.60 (C) (69). This show the cable ampacity is at 615 amps per cable for a rating of 1230 amps. We have derated the cable for the cable tray and the multiple cables application and our calculations show that after the correction factor factor we are at 922amps. 1230 amps x .75% correction factor factor = 922.5 amps. The customer is driving us to then use another safety factor of .25% off of the already derated cable. Can you please provide a longhand calculation for your solution on this application?

1586

Can I use distributon class/transmission class Lightning arresots for protecting the building? If not why please explain?

1351

What is the exact formula for one weber of magnetic flux?

1580

differnce between single acting and double acting solenoid valves

1326

CPC cable .PVC \1C....I want to get sure that type is flexible indoor or to be install on trench. please advice .thanx :)

1348

how to store the thunder power?

3645

What is the earth treantment procedure?

1522

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