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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

Why in India only 50hz frequency not 60hz

Prism Cement,

2 2416

how to reduce shorting current in a slipring induction motor

3 1662

why we are using KVA rating for transformer,not KWh rating?

NTS,

5 2716

What is the function of mid point voltage in battery bank

Jindal Steel and Power,

1 2739

11000volt DG set carnt kaise banvay

AVK,

755

what is the function of DC panel in substation?

4 3084

Why 1500 rpm of deasel generator please explain to me?

Integral BioSciences,

1 1401

What is T’Q and X’Q and X’D ? and what is saturated as well as unsaturated ?

XX,

886

What was the Dg set radiator and lube oil temperatures trip in ACB

Gland Pharma,

890

In case of HV test on medium voltage cables, BS is asking for 4 U0 where as IEC is asking for 3.5 U0. Can any one advise me how this 3.5 times or 4 times U0 is derived?

753

In both 600/1000 V cable and 450/750 V cable, we can supply 415 V. However for distribution, all utilities are using only 600/100 V instead of 450/750 V. What is the reason?

881

Why diesel tank kept in 990 ltrs

Reliance,

1 2132

How to reduce -234126219.6403 MVAr generation and by what?

842

What is cp system and why is it required.?

Essar,

1 1352

If a capacitor bank is having rating 750kvar for 6.6kv. Then for 3.3kv how much will be the rating of capacitor bank.

OCL,

1 1575


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Un-Answered Questions { Electrical Engineering }

What is the difference between Delta & Wye windings?

1184


Dear sir, iam completed iti ncvt electrician 2000-2002 & diploma electrical eng completed 2008-2010 distance education in rvd university, still i got B licences only but my working company want C licences, how to i get c licencese pls reply me iam in critical situation thank you karthick 9841637803

892


what is meant by re-rolling motor? how it differs from standard motor?

1062


How to design harmonic filter at the project stage without nowing the harmonics levels

1289


what material is used in capaciter

1052






why the starting voltage drop in a cable needs to be limited?what is percentage of the voltage drop allowed during starting?

1012


How does the phase sequence controller works, how it identifies the phases? confirm working principle

1034


generally in LT and MV motors we are using 3.5Coresx16,25,35,50 etc cable for supply.although motors is earthed at two point and having all protection.then why we are using that 1/2 core for earthing the motors.while in HT cable we are using only 3core cable for motor supply.generally lt and mv motors are delta connected and ht motors having star connection.whethere it is having any relation with winding connection( star or delta).all motors i am talking about are dol only.can anybody solve my confusion.thanks...

1122


What is Annunciation?

1170


Which device is used for the source of emission of electrons in a crt?

246


How to test IR testing & magnetic balance test

1127


Why 1/3 is used in symmetrical components?

889


Explain dc generator with its types?

228


what are the advantages and disadvantages of oil filled cables over XLPE cables

16319


hi frnds...pls send me aptransco previous papers .....pls..pls,,,(madhar.rocking@gmail.com)and suggest me some websites

1231