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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

why battery is connected in series?

HP,

10 11681

what is isolation Transformer?

HP,

8 8106

I WANT TO KNOW LONGFORM OF CT/PT USEDIN POWER PROJECTS OR HT SWITCH YARD.

7 11825

What willbe change in programming when we use 5/3 solenoid inplace of 5/2 in operating of a cylinder?

ITC Infotech,

1172

What is the difference between SSR drive& AC drive?

ITC Infotech,

1 5930

Alternators are invariably star connected why?

4 7067

i need to give section engineer (electrical engineer) for RRB. Please suggest some book

1013

why secondary of open delta pt (two element pt) centre tap is earth what happen when this earth is removed

Essar,

1 4897

what is the difference between AC choke (inductor) and DC choke (inductor), working and design point of view?

Electrotherm,

2 22546

how snubber circuit works to protect switching devices?

Electrotherm,

2 4884

i have 28/32 MVA power transformer with 11/6.6 KC voltage rating and 12%impedance.it have star connection at both side.but it have another thied winding tertiary winding.what is used of this winding. pl tell me

7 7064

we change the speed of the synchronous motor by incresing or decreasing a rotor resistance

1 2237

how to calculate sizing of NGTR (Transformer rating,Loading resistor value and Current rating of resistor) and what is the X/R ratio. Details : 11kV,Capacitance 1.73532 micro farads,40kA for 1sec.

Bhel, Indorama, Power Grid,

1 4954

As per IS why should the control be taken only from R phase, why not from B or Y phase??!!

2 4374

three phase 180kva diesel generator can take how much load in amp and what is formula to get this?

lenovo,

13 50831


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Un-Answered Questions { Electrical Engineering }

The efficiency of a 100kva transformer is 0.98 at full load as well as half load , for this transformer what is the Copper loss at full load ?

848


why does a dc machine has high efficiency while working as a generator than as a motor ..

1065


what is high and low cut off voltage of BB and DG at SPS????????

550


I am experienced with house and industrial wiring but I don't have any licence how can I apply an licence and which type of licence i can get i didn't complete deee just only experience

804


Why Neutral Isolation is required?

1354






What does the term “voltage regulation” means?

194


What is center gravity load in substation?

1369


single phase power supply give to separate one steel coup with water, what reaction create

1120


How to calculate ant test the burden of Current transformer

1497


Any one can explaination about calibration with rotating sub standards?

1081


What is the ideal position cooling fan inside the dc motor?

1206


How good are you in resolving the commercial issues to Employer's advantage?

1495


Do Phase angle measurement have any application in freq/harmonics measurement? If so how?

1020


which type of effect of turbine and generator reverse power protection ?

3309


how we find transformer capacity by ohm

1219