Electrical Engineering Interview Questions
Questions Answers Views Company eMail

if two transformers are placed parallel & both have fault impedance of 50KA will it increase or decrease show example?

849

How many points does a Circuit can have?

830

if two transformers are parallel & both have fault short ckt. impedance of 50KA in each case will it increase or decrease show example?

1 1850




How many points can we have in AC Circuit? Show by giving suitable example?

3 3341

-----------means a source which can supply a constant voltage to aload irrespective of the valu of load resistance.

2 2494

will there be any problem by recovering slip from single phase induction motors?

779

What is the electrical difference between Earthing Switch (ES) and Maintenance Earthing Switch (MES)?

1 1362

how we calculate the knee point of a protection and metering CT and what is the testing procedure.

CS,

1 2441




HOW WE KNOW IN PHYSICALLY THE CONTACT SURFACE OF A VACUUM INTERRUPTER IS GOOD OR GOING TO DAMAGE IN A VCB AFTER ABOVE 500 TIMES OPERATED.

Areva,

975

What is a LBB protection and why it is used?

Gridco,

2 6303

what is a starter ??

NPTC,

2 2760

what main difference betwenn invetter & ups & major difference

ABB,

2 4585

Dear sir, I am working in wind mill division , pls explain Pls explain in details with formula My question is Wind speed 3.5 M/s Gen RPM is 1500 ( 25 K/w Production ) Wind speed 12 M/s Gen RPM is 1500 ( 220 K/w Production ) Why in 3.5 m/s generation was low , why in 12 m/s generation was high , Pls dont explain wind force or wind density , that one already i know For the above question RPM was same why the KW was different Answer : 1. Its depends on the density ( Force ) of the air Sir , Pls explain wit Formula sir

Vestas,

1 1921

why stay insulator is not used with stay wire for 11kv Lines. Whereas it is used for LT lines ?

Essar,

2 10585

Why are cables rated for 40 KA for 0.25 Sec fault current rating?

822


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Un-Answered Questions { Electrical Engineering }

How to dimensioning SDCCH, LAPD and CS7 signaling on GSM?

1607


WHAT IS THE DIFFERENCE BETWEEN AN ACB & mccb 7 WHAT IS THE CRITERIA WHEN TO USE WHICH OF THE TWO

1158


what is the ATS .And how it works.

340


How many devices can be connected in one zone of FACP

1122


What is the effect of interchanging core(made of steel) and winding(made of copper) material in case of transformer? Give proper explanation in regard to different losses in transformer.

781






we use capister for power factor. when we use capaciter in dg circuit  than defect dg. can we use capaciter bank for dg circuit

654


i am an maintenance engineer. one distribution board have 5 feeder. recently its ELR trips frequently, but it take some times after trip( 10min,20min..)but 3 feeder no load. two feeder only loaded. i checked one feeder IR value all values are above 50Mohm.but B phase to Earth is only 9Mohm.any problem about low value

699


Please brief working principle & construction of permanent magnet AC Servo motor

1111


if the motor rated speed is 950rpm. how to change the above rated speed? is it possible?

272


Show Details FROM:Muhammed Ikram TO:qa@allinterview.com Message flagged Saturday, June 4, 2011 10:07 PMMessage bodyHello all, i want to ask a question to all of you that what is VMM (voltage monitoring module )? how it work,s? i heard somewhere that it compare 1 phase voltage to other phase voltage. but there is also some setting on it. how to set it,s setting. please tell me briefly. Thank,s and Regard,s. Muhammed Ikram.

759


why the active power flow of some line is increased when the active power of out is cut ?

1002


design of IGBT firing circuit for 11KV

1406


how to choose cable size with respect to load? how to convert cable size in mm2 to sq.mm?

3507


How to Design green buildings services? What is the advantage to design green building?

748


WHY CBCT USE ONLY IN Y PHASE NOT OTHER PHASES

864