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 3525

why we are maintain phase to phase clearence

4 5383

why generation of electricity in low value voltage

3 4419

why the insulators are in cofee colour???

Visa Steel,

4 11064

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

CTS, OPTCL, Visa Steel,

12 38520

what is maintenance?how to explain

1433

cable selection formulas for electrical load.

Bhel,

1 7446

megger how much voltage will produce ?

4 7912

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

1688

what is creepage distance

2 8678

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

Lupin,

1804

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

3 7868

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,

1621

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

HAL,

5 5944

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,

1568


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Un-Answered Questions { Electrical Engineering }

what is the meaning of WYE and DELTA in Electric meter?

3315


In a single how much maximum current and watts using

1612


what is doid

2266


what is saturation kit?which use above 15 kw motors panel side.

3555


how to find impedance , mutual indatnce in transmission lines

1623






relation between power station capacity and voltage level?

1568


what will happen if earth of 33 kv cable (earthed system) is not connected to earthing pit?

1513


In parallel operation time both NGR’s close or not close if both close what will happen

3246


I WANT TO INSTALL LIGHTING ARRESTOR ABOVE 20 FEET HEIGHT INDUSTRIAL BUILDING. NOW IT WAS 15 FEET HEIGHT HOW MUCH DISTANCE IT WILL COVER & HOW TO CALCULAT THE DISTANCE COVER BY THE ARRESTOR

1469


For small size, high frequency coils, the most common core material is- a. )Air b. )Ferrite c.) Powdered ion d.) Steel

2497


What is meant by bus bar protection?

618


Single line diagram for dbb (double bus bar)system.

1441


kindly send me 11KV MV motor differential protection procedure by primary injection method.

995


What is Servo Ventilated Motor?

1571


Control cables in S's will carry 1000v which is AC R DC? Pls answer me 

1579