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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

why lightning arrestor are made by 2 stack of insulator but why cvt are fully 1 stack of insulator.

1 2869

why we are maintain phase to phase clearence

4 4283

why generation of electricity in low value voltage

3 3489

why the insulators are in cofee colour???

Visa Steel,

4 9557

why the tapping of transformer on ht side??????

CTS, OPTCL, Visa Steel,

12 34905

what is maintenance?how to explain

1009

cable selection formulas for electrical load.

Bhel,

1 6752

megger how much voltage will produce ?

4 6478

How to identify the start and end of 3phase 12 lead motor if U1, U2, etc numberings are lost or erased.

1300

what is creepage distance

2 7853

what is the working principle of energy saver control panel. please give the complete calculation & theory.

Lupin,

1356

For what purpose an AVR in generator sensing generator output voltage?and how the sensing is done by AVR?

3 6883

Is it possible to measure correct value of earth resistance & cable insulation ristance with out disconncting earth lead & both sides of cable ends? If not, any other method to measure ER & CIR with out disconneting from the system.

HAL,

1158

Is it possible to use AC supply insted of DC supply in trip coil operation? if not, why?

HAL,

5 4705

How to do cable earhing? whether by grounding Armour to ground or by running extra G.I wire along with cable? which one is preferred mostly amoung them? If the second one is more preferable how many GI wires to be run along with cable (1 or 2)?

HAL,

1064


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Un-Answered Questions { Electrical Engineering }

we can run 2phase as 3phase .what will be the differnce with respect to phase angle, power, current between the two modes

1179


What happen in ups if phase reverse?

1172


what is servo motor and how to work it.

1022


there are cam operated switches - why we call cam operated , What is cam ?

1034


solar inverters was not connected to the nuteral link .this nutwral possible to any other systems

825






What is Meter MF if External CT Ratio is 150/1 , PT Ratio is 132/110 Meter CT Ratio is 200/1 & Meter PT Ratio is 110/1

736


how to check ac servo motor

1233


how we calculate the withstansing current capacity of wires&cables?

1048


What happens when two positively charged material is placed together?

236


High voltage test procedure of in swgr board. why should measure millivolt drop on testing time?

1160


1.why we are using metal oxide gapless block in lightning arrester,2.What is minimum and maximum rating of metal oxide blocks using in india

1070


IF I KNOW THE AREA OF CROSS SECTION OFTHE WIRE , WATTAGE OF THE LOAD ,VOLTAGE SUPPLY WHAT IM GIVING TO THE LOAD AND ALSO POWER FACTOR OF LOAD ....... SO GIVE ME FOR WHAT AMOUNT OF CURRENT I SHOULD USE WHICH TYPE OF CABLE?

1010


what is allowed value of zero sequence impedancce of 6.6 kv nuetral earthing transformer ?what is the actual value

1237


Define rise time.

206


What are the advantage of free wheeling diode in a full wave rectifier?

203