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Electrical Engineering Interview Questions

compare between starting charactristics of synchronous motor with those of 3Q Squirrel cage induction motor

796

What are all the conditions to protect generator & turbine in thermal power plant?

2684

What is the need of generator relay panel

1107

What is function of Diesel Generator?

Bhel,

2622

why dc motor runs slowly when dc supply is given?

L&T,

3638

What is difference between wire and cable ?

5296

how to calculate the power factor when instantaneous voltage and current has harmonics in it ?

1022

if we have a power factor 0.99 and we add a capacitive bank with it then what happen?

2945

15 kva dg set single phase takes 63amp( approximate) while same rating 15kva three phase takes 35amp approximate. why ? and what will be per phase current for 15 kva

TVI,

2059

What is slip in induction motor?

2331

Can we calculate the P.F if we know the only load on alternator .

3247

How we calculate the Multiplying Factor of Kwh meter for 3 phase alternator.

985

What is the multiplying factor if line ct ratio is 1000/1 and meter ct ratio is -/5 ?

1674

how can we understand that where we have to use ac or dc coil for solenoid valve and why?what is the different between coil of ac and dc explain please.

1097

how can we determine size of a cable by knowing the kw or current rating of a load?how can we calculate the resistance box of a slip ring motor?

937

Un-Answered Questions { Electrical Engineering }

Can you explain about Restricited earth fault protection scheme

941

What is Percentage impedence of a transformer? why it is expressed at a percentage? what is the importance of percentage impedence in case of a transformer?

1045

I AM GOING TO ATTEND APTRANSCO ON 26TH OCT 08.PLEASE SEND ME ANY MATERIAL OR TYPE OF QUESTIONS OR EXP QUESTIONS.

1126

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?

624

why US countries maintains 110v and 60HZ

1374

PLZ EXPLAIN THE INTERLOCKING AND CONTROLLING OF CONTACTORS????HOW CAN I DO THAT?

4264

How to calculate main incomer rating of APFC Panel ? Let's say i want to find main incomer for 11kV, 1000kVAR Panel.

579

What if the difference beween internal and exrteranal LBB?

817

what is the generator rating for 40 amp load of 3phase motor.?? 400v voltage of generator... plz tell me with formula its urgent...plzzz... and also tell me that this 40 amp at all phases mean 40 amp on red,40 amp on yellow,40 amp on blue...... or the total sum of that 3phase is 40 amp....

4916

it is possible to rotate the DG engine dc starter with wrong polarity connections? why?

1379

in 132kv substation CRT means

1669

Post possible questions for Power Factor Panel FAT / SAT

587

what does vector group Dyn11 tell us? also tell me how will u differentiate between phase lead and phase lag thru this vector group

1203

what topics we have to concentrate for power grid et.written test.and tell what to read for english synonyms and antonyms.

1107

HOW TO DESIGN THE body EARTH cable(Copper Conductor) size for 60KVA UPS?

1124