Electrical Engineering Interview Questions
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Battery is a voltage source? give one example of current source and why?

Suzlon,

1076

Please help me regarding my one concern. - During earth pit testing we noticed that the Clean earth pit and dirty earth pit showing continuity (Resistance value - 5ohm) . I want to know that if both earth pit have separate location and there is not internal looping between PIT then why such continuity is showing on it . Because of this issue the field side all earthing point showing short. In PLC panel we are providing two types of earthing cable which is coming from separate earth pit (Clean and Dirty earth pit) because of earth PIT showing short our PLC is not complying spec . please help regarding this issues.

1086

For DG or Transformer body earthing, is it necessary to terminate the earth bus to earth pit directly? If not terminated to earth pit directly in earth pit and connected to any common bus strip which ultimately connects to earth pit, what will be the pros and cons?

1 1354

If only R Phase is connected in 2 pole elcb, n is not connected than it will work or not in ground fault.

981

Electrical 'C' license full abbreviation , and full form

1312

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

1010

What happen if transformer neutral path get removed ?

1 1478

We have two APFC panels in same station. I need how to connect CT in two APFC panels.can we take one CT in series connection or two separate CTs.

970

please explain to me how to calculate current,voltage,resistance with formula??

963

for what voltage will reactive power be largest in 380 kv line : a) 375kv b)380kv c)385kv

980

What are the raitings of Mcb,mccb and Acb in detail ??

Engineering Vision,

1094

What is icu and ics in Acb and how many time icu or ics passes from breaker?

Engineering Vision,

1035

why we use Test Terminal Block in 11 KV and 33 KV electrical panels.

EMC,

942

before synchronizing an alternator,power factor is leading ,why?

CUMI,

997

we have amp, voltage, kw, length detail then how to calculte copper & alluminium size of conductor of 3-phase induction motor

941


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Un-Answered Questions { Electrical Engineering }

What is Load sharing of Transformer ?

1534


When and where resistance earthing is used ? How to calculate the time constant for earth fault

1325


define superposition theorem thevnin theorem ,norton theorom?

1783


If we impress a dc voltage of 230 V on an unloaded 230 V, 50 Hz transformer it wi A give high secondary voltage B burn out C give secondary voltage as per K D none of these

1564


How line capacitance & line inductance varies with increase in height tower.

1853






what shoud be strength and weakness to impress interviewer????????

1610


What are hrc fuses and where it is used?

717


hi frds, i m electrical engineer.can i get cdr for electrical engineer if u have then send me on my mail id its jayesh_ee88@yahoo.com.please help me frds

1597


1. what is usage for power factor in industries?? 2.why we need to monitor power factor??

6672


TCS IS IT COMPANY THEN WHY DO THEY NEED ELECTRICAL &ELECTRONICS ENGINEERS?

1461


WHY DO VOLTAGE TRANSFORMERS FAIL DURING EARTH FAULT IN THE DELTA CONNECTED 6.6KV ELECTRICAL SYSTEM

1530


can someone explain that how the speed of the protection system affects the fault level calculation?

1458


Either It Possible a dc Motor to Run On Ac Drive [ Ex : ACS 800 , Yaskawa F7 ] If it is Possible How Pls Inform Me dinesh_elect_eng@yahoo.com

1537


in general it is observed in power stations, the tertiary winding is used in higher rating Y-Y auto transformer but not in Y-Y power transformer. is the tertiary winding is compulsory then why it is not using in power transformer 

1281


Why Stabilising Resistor used in REF circuit ?

2711