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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What does the a,b,c of 95a,95b,95c relays denotes?

KSEB,

1562

what do you understand by dressing a HT/LT pole

Federal Polytechnic Nekede,

1 1268

when a 500kva-400hz single phase transformer operated on a 100hz supply then what will be kva required

2 1796

Why is it prefer to initiate circuit breaker failure by "86" lockout relay not by "94" tripping relay ?!

OEG,

833

Why is transformer core is earthed

3 2756

Describe kW and kva and difference between

BTM,

4 2204

harmonics filter

SEHA,

1027

what is the constructional difference between a power transformer and potentian transformer?

BTM,

823

Can Anyone Answer anyone of these ? Q1) why direct SOLUTION of Load Flow Studies in Not Possile ? Q2)Why majority of Buses in power system are load buses Q3)Why one of the buses in Power system is taken as reference bus (slack or swing) Bus ? Q4)Bus Admittance Matrix is a sparce (means it contains some zero elements ) matrix , give reason

787

what happens if sf6ckt breaker gas pressure is high or low about the actual rating of gas pressure(5kg/cm2)

2 1727

can you tell me/show me, how to manually synchronize 2 DG. preferred with video.

Cummins,

2 1448

What is the complete procedure of erection of electrical panel in industry

BTM, Imerys,

885

How we select the cable rating

BTM, Videocon,

1 2253

How many power required for 1.5 to Airconditioner?

College School Exams Tests,

1 1248

How to select a cable size for particular load?

Amit Enterprises, Takasago Engineering, Techno Electric and Engineering,

866


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Un-Answered Questions { Electrical Engineering }

3phase cable calculation formula by motor load

506


we have require a Motor (1500kW, 6.6kV, 50Hz) which shall operate at 1500rpm during 30min and after it shall run on 500rpm during 15min. The same cycle shall be repetitive during the whole working days. Which method is best and economic to achieve such type of task. VFD, VVFD, Pole changing motor etc.

1011


how calculated Transformer losses.

982


How do you compute voltage drop and cable size over distance?

1314


What are m circles?

183






why are distributed windings generally used in alternators?

1813


Can you explain about Restricited earth fault protection scheme

867


witch pump used in wtp

1125


What is the ratio of true power to apparent power in an ac circuit?

165


What will be the current drawn by HT motor, if low voltage is applied.. any formula to calculate the LT amps of HT motor.?

526


Rules and standards of electrical control wiring ?

195


What is a differential amplifier? Also, explain cmrr.

194


I have motor 1500 HP and , 4160 V , 60 HZ , then i need the rating of transformer which can feed that motor ??

924


If Dg set load increase 25%, How much increase fuel Consumption (15 kva 2 cylinder DG set)

1380


HOW TO WRITE A QUENTION ANSWER? I MEAN SHORT OR LENGHTHY ? OR FROM THE BOOK AS BOOK..... SOME TIME WE GIVE A ANS FROM THE BOOK AS LIKE BOOK ND WE GET MINIMUM 60% MARKS OR MORE THEN....... THEN HOW TO FILL THE Q-PAPER?

1000