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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

What is the difference bet ween EDO Type & MDO type ACBs, and what is the advantage EDO Type over than MDO type ACBs.

Siemens,

2 63093

how brushed dc motor operating ?

1847

how brushless dc motor is operating ?

4 6558

We have a 33/11kv switchyard having 12.5 MVA power transformer. We export & import power through this transformer. When we export power, the PF will be depend on GRID PF & when we import power the PF will be depend on our load PF. but the problem is that,when neither we export nor import but our 33KV vCB is in close position,our meter read the power factor 0.14 to 0.25 at that moment. So how can be we improve the power factor at that moment.

3 6383

what happens if power factor is maintained at 0.9?give me the answer in technicall way rather than telling the penality n all

NCC,

5 10586

what is the use of static frequency converter and static excitation equipment? and where it is employed? for what?

Toshiba,

3451

What is ac and dc drive.

1 7315

What is plc.

2 5144

What is ht lt switchgear.

Bhel, HBL Power Systems,

3 32389

What is lighting kitts.

2065

Why use only DC supply to charge batteries why not AC Supply??

APC, Emerson,

3 8084

can any one suggest paper presentation topies for electrical engg?

1956

1.what is the easiest way to convert AH(ampere hour)to watts?.

2 5250

1.What will be stored in online ups EPROM IC?

IBM,

2009

1.How to calculate backup time from series connected battery of 12v dc with 26Ah for 2battery?

3 9907

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Un-Answered Questions { Electrical Engineering }

What is the difference between amorphous core transformer and CRGO core transformer?.

3684

Briefing the effects of ASR and ACR of a double closed-loop speed regulating system.

2210

What is slip in an induction motor?

1105

what is the diference between the 4pole & 6pole DC Motors & what is advantage 6pole over the 4pole ?

1863

why only exciting current is shown not primary current in transformer???

1818

use of PIR in ehv breaker

2117

What is Harmonics how it is produced and what is the method to control the same

2230

What’s electric traction?

1094

What are the Formula of computing Back up Time of 500kVA UPS with 4 Battery Banks, each bank composed of 43 pcs of Batteries 12V150Ah. How to compute the Back up Time of UPS? We have also 3X500kVA UPS running in Parallel same composition as I write above.

1302

A system absorbs 100 k J of heat and the increase in its internal energy is 100 kJ; the work done is

1240

How efficiency of thermal plant can be improved?

1168

How to calculate the input cable rating for 10kva ups (3phase input and single phase output and also 3phase output, battery rating 65Ah)provide the formula also.thnx

2165

hello if any one have papers vof hpcl or sail, plz send me

1888

How Self works in DG set

1935

What is the transfer function?

1045

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