Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is mean by single phasing used for electrification in rural area of maharashtra ?

1 2700

DEFINE BREAKING CAPACITY OF BUSBAR & HOW IT IS CALCULATED?

4781

what is vfd?

2 3741

what are the major difference between 3phase 3wire and 3phase 4wire trivector meter?

L&T, NTPC,

2 5707

What is PIR (pre inserting resistance) in 400kv EHV SF6 BREAKER? Why it use?

Adani,

1 9629

At the time of 1st charging of transformer, there were huge inrush current, so why at that diffrential relay are not operated? Why?

Adani,

3 7698

Can i get some examples of mechanical devices?

1 5777

What should be ideal IR value for 11kV, un earthed, 1 MW motor?

Sail,

3 5456

what is difference between earth fault& restricted earth fault.

3 5135

why they charge more bill for low power factor rather than high power factor

2 4867

what is the function of RVT

RMSI,

4 18866

what is the function of series reactor

Adhunik, INOX, RMSI,

3 9501

Who are the manufacturer for Nitrogen based Fire Protectio/explosion prevention for Oil Filled Transformers? India and international both?

1423

what is the effect of leading power factor on Power transformers in existing in major power utility

2 3510

what is the function of compressor?

2 3962


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Un-Answered Questions { Electrical Engineering }

how to compare with Relay settings for HT< panels, RMU panel, and PSS CSS transformer?? 1) Load amps, 2)Tripping time, 3) CT ratio, 4)Cable size 5) Transformer KVA rating 6) transformer full load amps

727


Whether power factor should be high or low? Why?

659


explain with diagram how to protect transformers and substations from over current with help of CT's?

1503


How to arrange a hous hold earthing system to keep minimum earth resistance( below 7ohms).

1488


What happened if C.T mount at any cable or Bus bar in wrong direction . C.T going on proper work or not . C,T direction is essential thing to properly work.

1245






What is dc current source?

729


WHY THE RATINGS OF THE TRANSFORMER IS 33KV WHY NOT OTHER???

1926


RATING OF LIGHTENING ARRESTER FOR 11 KV LINE IS 9 KV is ok ,but haw to calculate the KA rating?

1531


I am having a 1500 KVA transformer whose secondary current is 2086A and my connected load is 1000 KVA, I am having 400 KVAR APFCR for PF improvement what ratio of CT should i install in LT EB Bus to get optimum PF improvement?

1317


I want single line diagram for AMF & DG syncronizing panel

6628


describe the Tranformer testing procedure

1460


What is the resonant peak?

646


Can you any one explain application of buccholz relay operation and pressure relif device operation of power transformer

1442


State and define ohm’s law?

673


How to work meggar?

1362