Electrical Engineering Interview Questions
Questions Answers Views Company eMail

Do I need a special Transformer to put 240 VAC 3 phase into it and and get 480 VAC 3 phase out of it to run a machine? Or, do I just use an ordinary step down transformer and step up the voltage? Thanks

2 2742

what is the principle of vvvf drive motor

3 25630

We know that, in case if there is a faulty insulation,or sc, the current is bypassed to earth through the earth wire that has low resistance.Actually, what will happen to that current that flows through gnd?In that case,if we come in contact with that faulty appliance, wont that current flow through us as we form a closed path by standing in gnd?Is grounding a safety measure?

3 3444




Hai, I am from EEE branch.On feb 17 iam going to write an Exam for hindustan petrolium corporation Ltd.So plz send me the written exam pattern/Q's/interview questions.please mail to yuva_polisetti@yahoo.co.in

692

why we step down voltage level from 33kv to 11kv and 11kv to 415v.Instead we can step down voltage from 33kv to 415v directly using single transformer.

Adani, HCL, Central Electricals, Electrical, ABB,

12 53430

sir, I am from EEE branch.On feb 17 iam going to write an Exam for hindustan petrolium corporation Ltd.So plz send me the written exam pattern/Q's/interview questions.please mail to eee_dharmendra@yahoo.com

686

what do you mean by 1 ton in AC`s

Bhel, Bosch, ITC Infotech,

36 91107

how can you prove that in CE configuration a transistor has 180 degree phase shifted output

Bhel,

5 10998




hi frenz,its aswathy.i hve aplied for the hpcl test on feb,pls send the test patern & the placement papers as soon as possible. mail-id :kjaswathy@gmail.com

606

HAI SENT HPCL APTITUDE QUESTION PAPER, MY EMAIL ID IS angus_eee04@rediffmail.com,angus_eee04@yahoo.com

859

How can we measure and monitor critical performance parameters of Diesel Generator Sets, both electrical and engine ?

Cologicx Systems,

3 7098

hi frnds.....anyone get any reply from HPCL. I HAVN'T.....B,COS written will b on FEB 17 th.

HPCL,

1 2685

what is the maximum genarating in india?

17 30182

WHAT IS THE DIFFERENCE BETWEEN RESISANTANCE AND IMPEDANCE IF IMPEDANCE IS MORE THAN RESISTANCE AT SAME VOLTAGE CAN WE HAVE RELATION DERIEVED BETWEEN THEM

4 6589

How to calculate D.C load current?

3 27317


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Un-Answered Questions { Electrical Engineering }

In case of salient pole alternator when number of poles are 4 or more than 4 it helps the flux wave to be sinusoid as air gap length is increased from center to tip , but if the number of poles are 2 how does the flux wave is sinusoidal?

885


Operation of isolators.

708


what is a speed of rotor when we give supply to stator of 50hz and as well as rotor of 60hz of an induction motor?????

483


dg started in plc mode and load taken later one battery terminal connection will be disconnected by loose connection what will happen for dg and shall we connect battery terminals while dg in load time?

769


how to choose cable size with respect to load? how to convert cable size in mm2 to sq.mm?

3311






how to calulate short circuit current for the following: 1.cable connecting 11KV of 22KV/11KV transformer to 11Kv of 11KV/415V transformer 2.what cable size should i use.

928


HOW TO SET THE EARTH FAULT SETTINGS IN ACB????????????

770


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

1028


1.What is the range of stator resistance of 3-phase induction motor? 2.Two electrically operated vibro motors are foxed in parallel direction in vibrating feeders. what is the direction of both vibro motors?

748


while doing high potential for 11KV 3 core cable how much leakage current will obtain?, what will be acceptance value?

1678


what is feeder bay?

274


how we can come to know that motor winding resistance which showing by DMM is right or wrong???is there any chart or something that we will compare & check???

713


what reason of line current and phase current in star connection and line current and phase current not equal in delta connection?

842


Why the arms of delta in a delta-wye power transmission system are kept constant??

751


Explain and give me an example of a time when you had to explain some new procedures to your co-workers for quality service delivery, how did you go about it?

641