Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What is K-rated transformer? What is the use of it? What can be the size(pls provide calculation if possible) of K- factor transformer for 550kW,690V motor operating with drive (VFD)?

842

what is the effect of power factor of machines in starting current

731

How to calculate total harmonic distortion level(THD) in VFD? and how can we reduce harmonics?

Apollo,

2585




Describe: Energy efficient motors

Reliance,

1 1748

How to size a transformer which will supply power to 550kW,690V motor starting with VFD?

1 2363

Can any one provide the inspection procedure of MIMIC for VFD panel? Details: If someone wants to have a mimic in the VFD panel what are inputs considered for the mimic(like on,off,trip) whether we are able to add speed variation in the mimic(if so how can we get) and what are the parameters to be checked in the MIMIC during inspection?

816

TO operate transformers in parallel, vector symbol of the both should be same.If one transformer name plate is not there, how can we conclude that whether the transformer is having the same vector symbol or not?

4 4129

what is the diffrence between voltage and current?

11 7803




why Line voltage =1.732XPhase voltage what mean by 1.732

IBM, NCC,

4 16380

what the purpose of transmited high voltage in over head lines

NCC,

3 3507

how to find impedance , mutual indatnce in transmission lines

NTPC,

818

what purose of the double circuit transmission line phase of the line phase changed for circuit-1 for Circuit-2 R-Y-B B-Y-R

NCC,

1072

what the function breaker failure scheme, how is it operated

677

Transformer TTR test procedure

Descon,

2 5132

Dear Sir, we met a disaster with our 62.5 kva genset, after rewinding we informed by our contract engg that due to return current coming in neutral & impropper earthing this happend. But after all set up & load balance we checked & found again we have about 20 to 32 amp return current on neutral. we have 12 airconditioner + 12 mini fridge on single phase line. Pl suggest any idea to solved this problem

3 2148


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Un-Answered Questions { Electrical Engineering }

What are IR values and what it should be for coil and for insulator

1729


use of PIR in ehv breaker

854


Why in 6 KV XLPE cable termination kit used and why not in 380 V xlpe cable same is not used

1344


although ckt breakers have taken the place of old fuse. But instead of it , these older ones are still used in the industries and homes ? why .... what are their advantages and disadvantages ? which one is leading and winning the race and competition ?

701


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

815






why all the feeders are designed in a particular manner ... is there any reason for that???

672


What is the difference between Static and servo controlled voltage stablizer?

852


What is the difference between single point and double point bonding. please kindly detail about bonding of cables.

1009


What are the Return ( Monthly / quarterly/ Annual submitted to Electical Inspector for an establishment (Factory in Maharashtra-- Small scale category having seperate HT line of 22KV ) as per Maharashtra Electricity Act

712


How to calculate that clean water supply in one Day from 150 KLD STP?

787


What is speed mode?

355


Dear Sir I am living in Jaipur Rajasthan  now I did complete my b tech degree in electrical engineering in 2012  Sir how I gate certificate of competency for electrical supervisor

822


why occ characteristics of generator is also called as magnatization characteristics ?

680


Why reactors use before incoming of ac vvfd drive?

435


what is the power rating of CPU, CRT type moniter, LCD type moniter,scanner Approx.

873