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?

784

How many points does a Circuit can have?

784

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

1 1782




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

3 3030

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

2 2406

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

732

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

1 1275

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

CS,

1 2353




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,

898

What is a LBB protection and why it is used?

Gridco,

2 6154

what is a starter ??

NPTC,

2 2690

what main difference betwenn invetter & ups & major difference

ABB,

2 4501

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 1855

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

Essar,

2 10330

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

754


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Un-Answered Questions { Electrical Engineering }

how ceiling fan worked?

764


how  do you choose the cable size as per amps rating & the voltage drop for the same.

693


How much pf maintan in dg set in 6o% load,when Dg runnig Neutaal Earthing removed what happen.

677


What is touch potential and step potential?

944


aternator every parts and its working

345






can we conduct the swineburne's test on a dc series motor? why?

776


What is meaning of out of phase (making & breaking) capacity And how to calculate

961


why the colour of insultor stack , petticoat is brown. Is it has some technical reason.

901


how the phase convertor changes the no. of phases

924


Explain about Dubai electrical sysaem? Explain about Dubai drinking water system? Explain about Dubai Burj tallest building Electrical,Water.etc.. maintenance system?

889


what is meant by impulse voltage?

833


What is Faraday's law

317


what is the prinsiple of dc motor and construction and working ,application of dc motor.

712


What is the important precuations need tocarried out while working with Electrolite in Battery PM?

802


how many single tension hardware are required on a double circuit transmission tower?

810