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 basic difference between Soft Starters And VFD drives?

IBM,

19 51958

Between Star-Delta & Star-Star Power transformer which one is efficent for Earth Fault?

10 17006

Why we are use 11KV / 22KV / 33KV / 66KV / 110KV / 230KV / 440KV this type of ratio. why cant we use other voltage ratio like 54KV / 99KV et.,

College School Exams Tests, Hino, ITC Infotech, Reliance, UPRVUNL,

8 32009

From the point of view of accuracy in the Measurement of Electrical energy should we select a potential transformer or a capacitor voltage transformers?.Kindly support your reply with reason and justification.

1 3976

HOW DOES ONE SELECT A TRANSFORMER PHASOR GROUP IE, WHETHER A STAR-DELTA TR OR A STAR-STAR OR A DELTA-DELTA, ETC. TRANSFORMER IS MORE SUITABLE FOR A PARTICULAR KIND OF LOAD OR WORKING CONDITION???

KPTCL,

3 7808

What is the secondry voltage of 420kV Current Transformer , the rated current is 2600A

6 8231

1. what is the power factor and whatis his losses 2. what is the working procedure of 51RNB AND 87 relay

ABB,

3 6361

What is the difference between RMS and average value

CEERI, HPCL,

5 38427

When geneartor is running in poor lagging side power factor its excitation current increases then it is running in improved lagging side.Kindly tell me when gen is running in leading side what will happen

3 6691

Can any body tell me about Hi-pot test, and why it is necessary and its procedure of testing

6 9913

Can any body tell me about partial discharge test, and why it is necessary and its procedure

1 4454

Why not implimenting power factor in Diesel generator

HP,

6 11134

how vfd drives energy save

PowerTech,

5 10533

in slip ring motor if motor specification is given how we calculate its rotor resistance in starting

1 4961

If single phase voltage level is 230V than why three phase voltage level is not 660V ?, but it is only 440V.

BSNL, DOS, EFS, HMT, L&T, TCS, ThyssenKrupp,

16 75101

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Un-Answered Questions { Electrical Engineering }

What is the technical difference between On delay timer and a Star delta timer?

1622

what is the meaning of osr in transformer.

2148

What is transient Phenomenon?

2257

give single line diagram of D.G distribution form alternator to main L.T panel?

7567

what is meant by 3rd hormonics ?

1868

how can get electrical c licence.now i am working in spining mill , transformer capacity 2750KVA. SANCTION DEMAND 2250KVA. PLEASE ADVISE ME . MY CONTACT NO 09944226823

1802

aternator every parts and its working

1629

why high speed tripping relay is used in protection circuit why not normal relay

1491

If i have two 3000 kW motors and the whole facility requires a 10 MVA transformer. What would be better installing two 5 MVA transformers(one for 1 motor ) or just a single 10 MVA transformer for both of them. Give reasons for your answer.

6132

What is the Basic Difference bitween Long Shunt Connection and Short Shunt Connection in DC Generator?

2351

Why is back emf used for a DC motor? Highlight its significance.

1210

What is the difference between diesel generator engine with and without turbo charger with the same capacity?

1694

i applied for c licence with my one year apperents trainee and i have attaced with A grade contractor company experiance that is for 14 monts experiance this document is sufeicant for c licence? pls tell why they rejected

2270

What is meant by a stray loss of a induction motor??? What is the equation to find it

3101

What is essential to prove safe isolation of electrical circuit?

1079

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