Electrical Engineering Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

How will polarity test of Dy5 Transformer ?

2219

how to remover corona effect and hysteresis losses from contactor

2035

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 4235

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 5775

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

1 3889

how to calculate no load losses units comsumed by transformer

MRF,

2 7904

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

Infosys, MRF,

3 10151

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

4 7809

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 5919

why battery is connected in parallel ?

7 10019

what happens if dc supply is given to the transformer?

10 17878

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

Titan,

6 11226

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

2 7509

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 4375

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

3 5373

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Un-Answered Questions { Electrical Engineering }

1. What is differential relay? How it operates? 2.How to calculate the Short Circuit Impedance in Transformer? 3.What is the alternate solution for testing of polarity by using polarity tester while its milli ammeter does not works? 4. While testing the 33KV Busbar by using Hipot kit, what should be the test voltage we have to apply? 5. What is the procedure/activities to be taken to inject the current more than 2000A by using 2000A Loading Transformer? 6. Explain how you can give the overload setting to any Motor Protection Relay for a HT motors with formula and example? 7. Why restricted earth fault protection is needed? Why can’t differential Protection is sufficient? 8. What should be the minimum and maximum ohmic value for earthing? 9. Why DC Currents are not used in transformer? 10. What is the Frequency while we step up the voltage from 220V to 11KV? Is it possible? Explain it?

2279

How equivalent impedance is calculated in thevenin theorem?

1155

Actually I have a doubt on neutral and earth.we use Ac power without taking neutral by connecting to earth,but at that time does it affects on efficiency of any electrical components or no? If yes how?

1406

how to calculate the fault in substation

2460

what is meant by flywheel and its role in retardation test

2438

which capacity of RCCB used for five thousand watt electricity load?

1874

If the feeder rating is 7.5 kw or 10 HP star-delta feeder, MCCB is taken as 63 a, contactors-32 a, how much will be the OLR rating or which range OLR should be considered when we concern about type-2 coordination?

2311

What is maximum power transfer theorem?

1114

What are the functions of different probes used in cro?

1200

Can we check ELCB constantly from R1 to R8 phase in 1 no DB?

1700

What is kvar?

1338

why it is not advisable to run low rating (19KVA) DG sets in parallel for long durations even though they are provided with droop ckts (QDC)

1910

What is the effect of positive feedback on the stability of the systems?

1089

sir please send me techinical questions for junior engineer posting in bangalore railway i am diploma holder

2106

What are the parts in a inverter?

2092

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