Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is the difference between thermal magnetic release and microprocessor based release breakers. what are the advantages of latter over the first one...

TCS, Jackson, Karthik Industries, McD BERL,

5 35224

what is the difference between earthed system and unearthed system.. where do we use unearthed system because in electrical catalogues always cable for earthed and unearthed system is given..pls elaborate

3 29894

how to connect from a line-to-line connection to a line-to- neutral connection?

6 4577




what is the function of a starter in a motor? explain RLC circuit.

14 63180

wap to print prime number from 1 to 100 using c++

1 5397

wat are the transmission losses.... how can it be compensated....... wat s power system.......

TCS, NTPC, NPC,

1 2975

wat s reactive power.... how could it be compensated.....

TCS,

4 4138

If one tertiary phase i.e. R,Y or B is earthed of a loaded type tertiary delta connected (Without load)of a power auto transformer, what is its advantage/disadvantage?

Amara Raja,

814




how we can adjust for three phase motor cold stall time ,hot stall time and thermal register set up?

OPS,

1558

What does VVVF stands for in VVVF drive ? How does it differ from VVF drive?

HAL,

8 34517

Iwould like to know barc interview questions

BARC,

1833

how LT meggar works

Essar,

1 4351

what is saturation in transformer

Essar,

9 38255

if voltage is not builed up in small generator what will be the reason?

century,

7 5886

what is droop?

Alstom, Bhel,

13 67746


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Un-Answered Questions { Electrical Engineering }

How to measure the earth resistance value in a concrete pavement(flood light area)?

809


a starter used for squirrel cage induction motor?

472


what maximum range of star & delta in hp or kw ?

410


Whether 3 phase induction motorwith 100 hp capacity , Amp 160 for which sensitive earth fault relay , type CTUM 15 can be used?

24


What is the best thing to protect the motor from running over full current. CT or O/L or pressure transducer at the given pressure rating

261






how to calculate the earth fault current

1115


at work we have a 3 phase motor but on testing one phase isnt getting a reading. it runs 24 hours a day all week. stops and starts well no noise or heating. the phase isnt down to earth.is it just a bad meter reading or not? phases one and three came up with a resistance reading of 0.4 but phase 2 couldnt get anything shows up as open circuit.

435


Why sometime AVR and sometime Booster coil is used in Alternator? what is the diferance between AVR & Booster coil due to which they are selected

1699


Purpose of providing neutral isolation panel for parallel operation of diesel generator

208


how work a harmonics filter(L-C combition).

826


how to calculate distance between busbar supporters for LT panel, what are the factors influencing in this design

3547


i am in need of AC SYNCHRONUS MOTOR 30KW. ANY ONE KNOWS THE MANUFACTURER OF SAME. ALSO MOSFET AC CONVERTER 20KVA CONT.OUTPUT.

737


During Starter Panel Com missing I Found The Main Incomer 40Amp MCB 10KA Trip When Motor Change Star To Delta Motor Rating 20HP BUT When We Use Same MCB To Other Motor It Does Not trip Or What Is Necessaries for Star Delta Starter MCB SFU MPCB OR MCCB And What are The Breaking Capacity of MCCB in the Motor above 15HP

744


What test must you do before powering up a circuit that you have been working on?

705


Is it advantages of having star-delta vfd than normal star vfd , if yes why?

982