Electrical Engineering Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

what is ISF

1 6115

what bridge circuit is used in Tandelta circuit

1 3627

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

1983

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

Hosco,

3 8929

what is the voltage rating of chiller unit sensors

Voltas,

2774

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

Automobile, Siddhi Vinayak,

2110

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

2 4329

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

1939

why ups in kva ratings?

2 5596

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

Mettur Thermal Power Station, Siemens,

1 6453

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,

3 5938

Why overhead transmission line in triangular shape?

2 9064

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

1844

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

Rashtriya Ispat Nigam Limited RINL,

1 3842

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?

Hormozgan Steel,

2324

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Un-Answered Questions { Electrical Engineering }

WHY IL=IPH IN STAR AND WHY IPH=IL/1.732 IN DELTA? WHAT IS REASON BEHIND IT?

6359

What is an 86-P or an 86-A trip

2078

how to calculate

1692

Consider three heater bank connected in 3 phase star with neutral.Each heater bank connected in each phase.So each phase get 230 volts supply.my question is,during balance condition, current flow in neutral or Not

1641

how does the rotating m.m.f is produced in the 3-phase induction motor and how the poles are created in 3-phase induction motor ?

2645

1. If 8.35%Z means the percentage impedance of 132kV-line from power company, we will like to confirm its base capacity?

1978

WRITEDOWN FEW RELY CODES

2270

How can we measure earthing resistance test (Earth meggar) of Transformer neutral pit while in live condition?.

2140

How out of step protection relay works?

2441

A parallel flow heat exchanger will perform better than a counter flow heat exchanger. State if the statement is true or false.

1257

sir, what is the importance of Fault MVA. how to calculate fault mva of 33kv substation connected by 6.5 km line(single circuit with equal spacing) with 110/11kv transformer in 110kv susbstation.the fault mva on 11 kv bus in 110kv susbstation is 208mva.

2956

Can an inverter be used as a converter? How?

1946

How many types of instrument cables are there?

1098

how can service sitting be setted for MCCB?Example for sittings IR (CURRENT RATING),IS(CURRENT STARTING)IO (current operating)?

1981

What is a parabolic signal?

1161

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