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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?

1158

How many points does a Circuit can have?

1091

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

1 2240

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

3 4960

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

2 2988

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

1037

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

1 1735

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

CS,

1 2785

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,

1239

What is a LBB protection and why it is used?

Gridco,

2 6815

what is a starter ??

NPTC,

2 3167

what main difference betwenn invetter & ups & major difference

ABB,

2 5065

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 2297

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

Essar,

2 11714

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

1075


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Un-Answered Questions { Electrical Engineering }

please give me solution to rectify the emi(electromagnetic interference)

1059


what is ramping rate of generator

1190


After completing iti in electrician, how can i get certificate of electrical supervisor? What ia requirements. For it?

826


Practical condition in 400KV Sub station:- Breaker(open) , isolator(open), Earthing (close) at both end e.g A & B. Now Open A Stn Earthing than Open B stn Earthing (Which have a 50MVA reactor) , AND suddenly show R,Y,B phase 704KV,573KV,118KV respectively. Que is without closing of breaker how it is possible.???? My Whats app No:07621840498 for Further Discussion. Pls experts suggest.

1171


which is the most advanced form of SF6 BREAKER?Can we use other gases to quench the arc?

1164






What are the components of feedback control system?

231


hai iam arunkumar. i have applied for an section enginner in rrb. i want lat 5 years solved question papers. if u have please sedn it to arun30682@gmail.com

948


Direction of flow of active power and reactive power with logic?

931


how to calculate the loss tangent of electrical cables

1192


how can maintain the power factor and why and this is how do work tell us

1151


How to design the NGR Resistance

1197


What is meant by time harmonics and space harmonics?

1885


What happen when neutral point connected to core balance current transformer? (Neutral point of an alternator of a 180KVA DG. Neutral point connected to CBCT means enter to the CBCT)

1462


how do u gauge the size of the cable ?for eg. consider a 300 sqmm L.T Cable.How do u determine the size of the cable seeing it pratically?

1150


what is meant by neutral compensation factor and where it is used

1067