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 51921

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

10 16984

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 32005

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 3974

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 7799

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

6 8224

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

ABB,

3 6357

What is the difference between RMS and average value

CEERI, HPCL,

5 38418

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 6688

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

6 9897

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

1 4451

Why not implimenting power factor in Diesel generator

HP,

6 11122

how vfd drives energy save

PowerTech,

5 10528

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

1 4957

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 75079

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Un-Answered Questions { Electrical Engineering }

why transformer ratings in kva? & DG ratings in kva? & Motor ratings in kw/HP?

1514

Explain dc generator with its types?

1127

What is mason's gain formula?

1300

how pt is using

1950

how are reversing the direction of dc motor

1654

How to calculate no of Lighning arrestors are required for protecting 50mX 50m*20m cubical building and locations of LA?

1841

model question paper for supervisor trainee

2038

what's producer of XLPE cable laying in undergroung

2128

what is th basic difference between a d latch time line and a d flip flop time line???

1984

A 230V dc shunt wound motor has an armature resistance of 0,15Ω.When operating on no load at 650 rev/min the armature current is 6A . The motor takes a full load current of 85A. Calculate the full load speed if the field flux is (i) maintained constant (ii)reduced by 0,03

2013

Please brief me about number of pole in alternator.In single phase alternator coils are connected in star or series. How to calculate frequency for the same.

1911

How to check 11000/1.732 to 110/1.732 Potentila transformer (PT)?

2208

what is the difference between earth leakage and earth fault?

2327

fuel-air ratio in a petrol engine fitted with suction carburettor,operating with dirty air filter as compared to clean filter will be

1063

Let me know that how i calculate the alternator sub tranciant reactance and tranciant reactance.

2640

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