Electrical Engineering Interview Questions
Questions Answers Views Company eMail

how calculation to be done of cable size/o.h. conductor size of 11kv h.t.for the load of 2175 kw

Shell,

1 6265

6 MVA transformer secondary is rated for 725V at no load. The incommer ACB is rated at 690 V, 3200 Amp. Would there be any effect on performance of ACB due to lower voltage rating?

5 7732

power is the product of voltage and current.so we can measure the value of power just by using ammeter and voltmeter.......then why do we use a wattmeter?

5 7849

WHAT IS THE MEANING OF 'UPF'&'LPF'.... HOW CAN WE DEFINE IT? WHAT IS THE VALUE/RANGE OF EARTH WIRE RESISTANCE USED PARTICULARLY IN HOME....

2 21990

Generator protection &generator test

1 5832

transformer test

4 12718

i want to know about torque of slip ring induction motor

Ambuja,

1690

I HAVE CONSUMER WHOSE POWER FACTOR IS 65% I WANT TO INCREASE IT TO 98%.HOW TO CARRY OUT?

7 7545

OUR METER READER TAKE READING OF INDUSTRIAL CONSUMER.THEY ALWAYS ASK HOW TO INCREASE POWER FACTOR FROM 60% TO 99 % TO AVOID PENALTY OF POWER FACTOR.

3 6687

what is cogging and crawling

2 6558

What is the make of breakers, transformers, generators? What are their capacities and ratings?

1 4034

how many earthing should need for UPS, where its connected

HCL,

7 10190

1.what is electricity 2.what is electronice 3.how many modules 4.five electrical component with symbol 5.five electronice componene with symbol 6.how convert 220v.A/C to 24v/DC 7.220V.WAIRING DIAGRAM OF AMMETER/VOLTMETER/OHMMETEER

Hatsun,

1 3572

How to connect frequency meter in metering circuit?(single phase and three phase frequency meter)

3 7585

How to connect frequency meter in metering circuit?(single phase and three phase frequency meter)phase to phase or phase to neutral

ABB,

7 33525


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Un-Answered Questions { Electrical Engineering }

66kv under ground cable how to layaing in ground any special case two ckt r runing

1518


How can we find the breaking capacity of a Load breaker switch (LBS) fed from 11 kv supply??ex:50KA, 26kA etc???detailed step vice answer pls.

1576


what is the difference between vector scale and vector diagram?

3752


RESPECCTED SIR/MADAM- I AM PRERING FOR SECTION ENGINEER (ELECTRICAL) RRB CHANDIGARH PLEASE SEND ME SOME PREVIOUS YEAR QUESTION PAPER OR MODEL PAPER.MY EXAM IS ON (30- NOVEMBER 2008).I AM VERY THANKFUL TO YOU. FROM- HARENDRA SINGH YADAV

1601


difference between servo motor and synchronous motor

1868






what is a power factor?

1305


Dear sir, iam completed iti ncvt electrician 2000-2002 & diploma electrical eng completed 2008-2010 distance education in rvd university, still i got B licences only but my working company want C licences, how to i get c licencese pls reply me iam in critical situation thank you karthick 9841637803

1251


WHY BLADE & JOW OF ISOLETOR IN SUBSTATION?

3837


why are the maintaine power factor and how can this control and this is how work.

1467


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?

1749


What is Instantaneous Earth fault relay,how will work

1668


What do you mean by the zone of protection?

610


what happens when series resonance occurs?

1380


SUTIABLE FOR ohm's law super conductor

1508


What is the use of lag compensator?

660