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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is ISF

4260

what bridge circuit is used in Tandelta circuit

2356

can i use ups power as a raw power for another ups

1011

what is the different ratings of ACB/VCB/SF6 which is used at HT side

6220

what is the voltage rating of chiller unit sensors

1936

How many types of interlocking use in screw type air compressor,make-Kaser(BSD MODEL)?

1120

to calculate voltage drop of cable which current we consider that means full load current or panel size?

2720

why ups rating in kva? and why ups are in parellel?.why isolation transformer is used in ups?

1077

why ups in kva ratings?

3544

why transmission voltage is 230kv and not 220kv which is a multiple of 11

4790

I know during Surge Impedance Loading maximum power is transferred through a transmission line and also Sending end voltage becomes equal to Receiving end voltage i.e Vs=Vr so my question is if both end voltages are equal then how current travels in such line hence how power is transmitted because flow of current needs Potential difference??

NTPC,

3565

Why overhead transmission line in triangular shape?

6288

Why is better to have a minimum ceiling voltage of 250% than 160%?

1031

Stepwise process of Northern grid failure in 2012!? (dont copy paste from wikipedia)

2415

For a 6.6kV Motor it is recommended to do megger test with 500 V d.c and not more than 5kV d.c but the Hi voltage withstand test should be performed by 12kV AC. Why the dc voltage test should be limited but AC voltage withstand test could be with such a high voltage?

1174

Un-Answered Questions { Electrical Engineering }

Can XLPE/SWB/PVC (P3) 7C X 2.5mm2 be replaced by Can XLPE/SWB/PVC (P2) 7C X 2.5mm2??? P3 vs P2

786

I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?

899

how to find Harmonics and types as per the equipemnts

276

how braking & making capacity of circuit breaker are calculated?

1428

100 MVA 3-phase alternator with earthed neutral has a reactance of 5 ohms per phase. what will be the fault MVA of generator.

1361

how to setting voltage RTCC panel

758

Where can i get practical knowledge of solar system?

542

how can i find ct ratio of meter by seeing name plate of meter and how it should be used in MF calculation if it shows only-/1???

887

The series field winding has low resistance while the shunt field winding has high resistance. Why?

519

standard earthing rating for power line..

1301

How does zener phenomenon differ from avalanche breakdown?

249

what is auto re-closer?

1531

What is power distribution criteria for converting single phase unbalanced residential load to 3 phase star connected balance system. Does total KW converted to 3 Phase. Means Divided by root 3.

1392

What is expention fastener (Fan)

1159

i have attended the interview on 4th June,08 at Kolkata in IOCL, can anybody tell me what is its result

1173