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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

Why 66KV is step down to 11KV and then 433v, not directly 66KV to 433v ?

 2 7450

Why the cores of large transformers build up of circular cross section?

 1731

What is Instantaneous Earth fault relay,how will work

1668

Alternator rotor earth fault relay circuit

1543

why there is a fault occurs, if a phase wire touches ground.. and the fault not occurs when we connect a bulb between phase and ground..??

1 2858

what is the difference between general inverter and solor inverter clerly explain plz

 1654

plz explain the snubber circuit unit

 1 4216

In EHV transmission line a neutral grounding reactor is often placed at neutral point of shunt reactors. What is the recommended protection for this neutral grounding reactor? Should I use a fast closing switch to bypass neutral grounding reactor when this protection operates?

TATA,

2745

What are the precautions to be taken before working on a cable?

Alfanar,

1 3672

How can you limit the fault level in a power system?

Alfanar,

1 3721

What are the condition for parallel operation of transformers?

Alfanar,

2 4615

What are the point of a single core cable to be earthed?

Alfanar, Jindal,

2 5202

hi i wonder will the speed of a 50hz AC motor reduce if i supply it with 25hz?

Divis Laboratories,

4 5085

why transformer impedance measure in % (percentage)

Hindalco,

4 7211

what effect on electrical equipment if PF is gone over 0.996 in leading when provider say that its keep in minimum 0.996lagging

ABB,

3 6082

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Un-Answered Questions { Electrical Engineering }

why h parameter are called as hybrid parameter?

1532

Capacitor is load free component but why ampere meter shows current when capacitor bank breaker close?

668

What is a DC series motor?

704

hi friends i m from electrical branch and seeking for tech. + apti. both papers of hpcl plz get it available as soon as possible

1333

What kinds of decision are made about CT from it's Knee point(voltage & current)?

3783




how to decide the panel size like MDB ,SMDB PANEL SIZES

6786

how to calculate vfd o/p voltage by frequency

1703

I want to know the 'Test voltage' for Tandelta testing of 3.3 / 6.6 / 11 KV Motors. Please explain

1777

A commercial Building is designed with 14th floor levels with indoor substation of three phase transformer with rated capacity of 1000 Kva.The transformer delivered 65% of its rated capacity at 0.67 power factor lagging.Because of low power factor, the power customer was penalized and certain cost was charged accordingly based on every point percentage lower than 85%.This situation may repeatedly happen on the succeding energy bills of power customer.The power customer is desired to improve its historical power factor of 0.67 lagging and no further penalty be impose by the local power company on the next bill. Q: Identify the appropriate solution you want to offer to Client?.Justify SCIENTIFICALLY and MATHEMATICALLY the principles behind the solution.

1331

sir my exam is on 19/6/2013 under electrical branch pls send me sample aptitude questions as well as sample technical questions for jindal steel and power company

1799

What should be setting for alarm,tripping and cooling fan on for power transformer's oil temp. and winding temp. indicator?

1441

What are the different types of transformers?

643

How to calculate the Efficiency of Chiller

2837

what is mean by ideal infinite bus? why it is required to consider in fault short circuit calculations?

2223

What are :- AC Distribution Board (Single & Double Front) DC Distribution Boards Distribution Board LT Breaker Panel.

1611

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