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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

Does dry and oil transformers both require dedicated neutral, because in my project we are using 2500kv dry star delta transformer, where they say neutral not required and even it is not provided in our substation. can u let me know

Voltas,

2 4150

Why neutral shows voltage with earth ?

MRF,

2 4691

Can we see the poles in the motor?. if yes then how can we see plz tel me

MRF,

2 5069

What is the rating of circuit breaker needed for 300 KVA load in 33 KV supply line in a transformer of 33 KV / 415 Volt ?

Hira Group,

1783

What is the rating of a circuit breaker needed for 300 kv load in 33KV supply line of 33/415 transformer ? Whether 800/1200 amp vaccum circuit breaker can perform for a 33 KV line in input in 415 volt in output of the transformer ?

Hira Group,

1676

Can we use MCCB with Auxiliary Contact in place of Contactor in a AMF System.

C&S, Farnek,

1 3733

Whatis the current capacity of 33KV/ 0.433KV transformer on Primary and secondary side/

1 3421

What is the significance of %Z in case of transformer?

1 3297

WHAT IS MEANING OF Gg & Gg IN hrc FUSE

3297

what is ring main unit?

Otis,

1 3609

how is find out kwh step by step

Voith,

1804

What is the difference between indoor and outdoor transformer

Ama Airfield Lighting System,

5939

how to find the transformer neutral copper earthing size

1 2661

if a 2 ohm resistor,2 ohm capacitor and a 2 ohm inductor is connected parallely to 12v source.Then what is the value of current in each branch.Is current flows in each branch at the same time?If not so then provide the proper sequence

Tata Steel Limited,

1 3122

According to ohms law voltage proportional to current, then why should current rating is low with high voltage rating in transformer?

KEC,

5 7921

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Un-Answered Questions { Electrical Engineering }

2- What are the percentages between excitation currents in phase (R, S and T) in ∆ and Ỵ connections in excitation Current test in transformers?

2022

What is meant by rotor?

1293

What do you mean by pull of electromagnet?

1049

what is diff. between earthing grid,earthing mess, earting grid?

2419

I am designing new project sub station with 220 kV / 11 kV, 40 MVA capacity. This project have many recifier sets, which can generate 3rd harmonics. Now I have to select vector group of This transformer. To minimise 3rd harmonics, what care should I take in selection of Transformer Vecrtor group? If it is Y-Y with open Delta tertiary then what should be the rating & voltage of Tertiary Winding?

1883

1) Explain why we don't link the two earthing system ht and mv on a pole mounted transformer sub-station.

1812

What is ideal IR values for ground and neutral.

1767

WHAT IS MEANT BY TV TERMINAL IN 500MVA TRANSFORMER?

2304

we have earthmat at 110KV substation.we would like to take earth resistance.b some says that by connecting earth megger terminals (C1,P1) at middile point of earthmat (at riser) will cause voltage gradient at other earthmat nods and dont get exat earth resistance.when connecting at end nods will get exat value . is it correct .please explain

2233

What is contract demand in solar system?

1717

Difference between on line capacitor and Station type capacitor

2027

What is time response of the control system?

1108

How colour picturetube works & how many year it will works.

2050

during installation time of transformer and alternator which points we have to observed?

1967

What is installed in PAC that is control the humidity

1524

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