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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

why the LED of my electrical meter glows even after the line has gone. what actually the reason?

3 4311

What is the high tension lines voltage and low tension lines voltage?33 kv is high tension line or low tension.

MPSEB,

1 7602

why a motor overheated stops to rotate ?????

1 1641

for which possible reasons a motor can fail to start??

CEB, Essar,

4 4704

In Panels Main Incomer considered should be TPN or FP?

2 4128

Why 5kv megger used to megger 6.6kv motor or 33kv transformer why not 500v?

2 7282

Why only plate(copper) Earth pit given for neutral earthing? why not pipe(G.I) Earth pit?

1 3730

what is the diference between the 4pole & 6pole DC Motors & what is advantage 6pole over the 4pole ?

1243

what is the diference between the 4pole & 6pole DC Motors & what is advantage 6pole over the 4pole ?

1376

what is the difference between 4pole & 6pole DC Motors & give advantage ?

1253

what is difference between fuse and circuit breaker?

4 5865

what happend if the protection ct is by mistake put instead of measuring ct & vice versa?

2 2956

what is the difference between normal motor and flame proof motor??

PI Industries, SRF,

1 27046

Is LV shorted in magnettic balance test?If yes why?

Hindalco,

2 3884

what is the lightning arrester rating for 3.3kv system voltage

1 3721


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Un-Answered Questions { Electrical Engineering }

oil cooled transformer

1586


for a 500 KVA connected load, I calculated 30% of capactor for power correction. Even after using 225 KVR capactor PF is not improving. What could be reason for low Phase correction factor?

1354


What is DC series motor?

504


What is highest size of HT motor like 11 kv or 33 kv,and how to make it 750 rpm.i think the size will be very big.any idea ? pl. reply..

1335


What is the principal of motor?

480






Why the dc voltage drop during starting of emergency lube oil pump? The Voltage drop from 135kv to 125 kv for one min. before re-establish to 135kv?

1615


what is the difference b/w ground & virtual ground?

1631


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

1357


give me a clear defination of inductance,and how can u calculate inductance of a motor

2162


How the PF control while running DG set with load

1434


Is it possible to make a 5P10/ CT Ratio 50/1A Burden 5VA

1046


How to know about the rating(voltage and other) of induction motor if its name plate is missing at the manufacturing site.

2641


how we select ac fuse rating of an power inverter???

1239


Differentiate between ideal and non-ideal voltage sources?

497


Why is the air gap between the pole pieces and the armature kept very small?

649