Electrical Engineering Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

why battery is connected in series?

HP,

10 16991

what is isolation Transformer?

HP,

8 12786

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

7 15524

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

ITC Infotech,

2060

What is the difference between SSR drive& AC drive?

ITC Infotech,

1 7571

Alternators are invariably star connected why?

4 10054

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

1875

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

Essar,

1 6398

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

Electrotherm,

2 25810

how snubber circuit works to protect switching devices?

Electrotherm,

2 6616

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 10857

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

1 3594

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 6868

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

2 6331

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

lenovo,

13 62230

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Un-Answered Questions { Electrical Engineering }

For overhead protection we use which transformer?

2489

is the value of inductance depends upon the value of thitha in doubly excited machine??

2032

For a 6.6kV Motor it is recommended to do megger test with 500 V d.c and not more than 5kV d.c but the Hi voltage withstand test should be performed by 12kV AC. Why the dc voltage test should be limited but AC voltage withstand test could be with such a high voltage?

2324

In a synchronous motor. if start is running at high speed. What will be the starting torque : Higher Lower Zero

1723

Name two types of electrical analogous for mechanical system.

1214

if we have a industrial load of 400 kilowatts with 415 volt AC then how much total harmonic distortion (thd%) should be acceptable for steady power system.

1981

HOW TO SELECT THE COPPER CABLE SIZES OF MOTORS,TRANSFORMERS?

2118

What is meant by load angle of an alternator? Upon what factors does the load angle depend?

3002

In ht capacitor ckt we are using LBS Panel it having isolator with fuse, one of HT fuse flash over, so what is reason behind this event.

2085

How to calculate the copper in HT motors if KW, RPM & Voltage is given

3208

what is the purpose of silicon dropper used in battery charger?

7454

what is spadar bar .why I use in DC generator.

1927

hello everybody. what does an abnormal stator winding impedance or dc resistance show? thanx

1918

how can calculate 1kva generator running time in 1 liter keroscene

2614

can any one provide me a connection wiring diagram for a DG set control panel along with BOM?

2215

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