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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What is the difference between tie bus and bus coupler?

 1 17574

Why does the radius of armature is less than the radius of pole shoe?

ABB,

1690

Why C.T secondary s2 done earthing?

4 13966

what is Harmonic effect?

2 3895

Star & delta kis principale pa hai.

ME,

3 4841

in dc machines in the armature nature of power is ac but why we take rasistance instead of impedance?

 1 2897

What is the difference between Droop vs Isoch Control?

 1907

Determine the BTU size of an aircon for 20 sq metre room

 1451

why it is necessary to maintain frequency constant in a power grid ?

NTPC,

1 5424

what is the difference between electrical wire and electrical conductor?

 4 17227

how to reduce earth resistance in sandy soil.

1 3173

How do i carry out or know the vector group of a Dyn1 and Dyn5 transformer

 1557

1.what is the difference between transformer differential and busbar differential.2)why we are using 2 slope for trafo diif and 1 slope for busbar diff.3)what is the purpose of metrosil and stabilizing resistor in high impedance relay circuit.4)how metrosil reduce the peak volage.5)what is the funtion of stabilizing resistor

 4270

what is quality factor in series resonance circuit and calculate the factor of voltage magnification? how it happens?

BARC,

1492

how to change the load sharing between two synchronized identical alternators when both are running with Diesel engine? assume both are feeding to same feeder?

BARC,

1 2754

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Un-Answered Questions { Electrical Engineering }

how to calculate differential current when we testing differential relay..suppose we have 1000kw generator,630amp VCB,what value we should put /inject so that relay trip the VCB? PLLZ justify ur comment

1162

How many kinds of E.L.C.B and how to work E.L.C.B

1600

what is a speed of rotor when we give supply to stator of 50hz and as well as rotor of 60hz of an induction motor?????

1233

WHAT IS IM (INDEX OF MOUNTING )IN MOTORS

1563

How many lightning arrestors to be installed on 50MX60MX10M building and is there any formular for that?

1473




Define what is the function of anti-pumping in circuit breaker?

693

1- What is the Polarization Index number be good for 15KV 3c#500MCM electrical cable? 2- Can I use the IEEE Std 43-2000 to perfom the PI test? Thanks

2913

what is tri state logic gate

1616

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

1502

The Howland current source produces a A Unidirectional floating load current B Bidirectional single-ended load current C Unidirectional single-ended load current D Bidirectional floating load current

1644

what is effect of length of air gap on performance of dc motor and generator?

1329

what is control supply rating of a machine

1493

how many types control panel of a 132/33 kv substation

2232

what happens to the supply voltage if there is any change in frequency?

5666

what is mppt (maximum power point tracking ) and how they used in solar power generation ??? what are the main components used in mppt?????

2789

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