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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

If we have a 2000kva load,How much kvar capacitors we go to add to improve the power factor at 0.9?pls give the calculation and fully theory?

ABB, Unitech,

2 7423

what is the kva rating of 20 kv transformer?

1 4846

WHY RATING OF VCB NOT LESS THAN 630A

2621

Hi, what is the temp of bus bar.

1 3787

How many types of Differential protection are there? and what the special arrangement are made at the time of charging of a transformer on the Differential protection?

1 2864

Why DC exitation to AC Generator? Why not AC?

Equate,

2 6431

Which type starter is used for synchronous motor?

Equate,

2 6994

What is infinite Busbar?

Equate,

4 16209

Why neutral point is consider as zero potential?

Equate,

2625

What is Nominal voltage?

Bhel, Equate,

3 10051

What is floating earthing?

Equate,

2 6353

What are the different methodes for calculating the short circuit Current?

Equate,

2059

What will be result if we connect LT votage to the terminal of HT motor?

Equate,

2145

What will be result if we connect LT votage to the terminal of HT Transformer?

Equate,

3 6752

How to select the different contactors ( starter combination) for different AC motors? what about fuse cappacity 4 different motors too?

Equate,

2 6426

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Un-Answered Questions { Electrical Engineering }

in the directional overcurrent and earthfault protection,normally we are setting the angle 45 deg lead for phase fault overcurrent and -45 deg lead for earthfault fro forward direction.but both the fault are operating on the same angle region only.why?how the relay will response?

1832

WHAT CAUSED THRESHOLD VOLTAGE TO EXIST?

4067

in shunt clippers why a resistor is used in sereis with the input

2094

why single phase to grd test in HV cable?why not 2 phase at a time?

2288

what is the earth current,reverse power,electrical trip generator short circuit,low voltage, high voltage please discribe me

2111

how to determine the inrush current of a transformer

2611

To prove the capacity of a 10MVA transforemr with 6.5% impedance by a short circuit test how much power is needed to inject an impedance voltage if we have to arrive for its rated current?

1922

where was current transformer protection units used and why??

2035

Hi Everyone ! My Name is Hakim ullah khan please i need formula of Cable Rating because i want to calculate by self without check any Table Chart... Thank you.....

1716

Why the magneti fields are not passes from southpole to north pole

2127

how to calculate the power factor when instantaneous voltage and current has harmonics in it ?

1961

What is meaning of out of phase (making & breaking) capacity And how to calculate

2246

Why we find the sensitivity for the CT's to check?

1864

Describe the colour rendering properties of i) tungsten filament lamps ii) tubular fluorescent lamp

3138

ELECTRICAL DRIVES: can a motor load system with passive load torque can have equilibrium speed in second quadrant

6318

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