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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

The power supplied to a 50mH inductor from a 120V, 60Hz source will be

2612

A 100W electric lamp is supplied from a 115V, 60HZ source. The peak instantaneous power dissipated in the lamp filament is

1250

i have been tasked with a design of protection, metering and control(PMC) relay panel extension to accommodate all PMC relays.There is an already existing panel where this one will be built.What are the design aspects for this kind of project? thank you.

1185

we use Dyn11 trafo for distribution purpose, if it`s possible for replacing Dyn1. if it`s change means what will happen?

1 3719

How to know th details about an electrical Drawing ? Please mention the easy method.

Siemens,

1589

can we use ACB for HT supply

Reliance,

2 3380

When oil level in the oltc of power transformer reduces , oil surge relay will act or not

4 5277

Why in KVA diesel engine? Why not KW

3 3265

what is the difference between delta delta and star delta connection transformer? why we use delta delta transformer since it need earthing transformer for grounding?

1206

two transformers of the same type, using the same grade of iron and conducting material, are designed to work at same flux and current densities, but the linear dimension of one are two times of the other in all respects. The ration of kVA of the two transformer closely equal to................? options: 16, 8, 4, 2

Vizag Steel,

1 8513

What is the selection process of breakers. Can any one please give a formulation on same?

Sterling Wilson,

1326

How can we deside Short Ckt level of electrical System,Breakers etc.please provide formula to find SC of HV side & LV side

913

th how could we differentiate between armoured copper and armoured aluminium cable what is the basic application? why we prefer the armoured copper as compared to armoured aluminium.

HMC,

1062

what is a FACTS devices? what is mean by STATCOM????

IIT,

1 6717

Hydro P.P. run @ 600 rpm,8pole, Nucler P.P @ 1500rpm 4 pole , ThermlP.P @ 3000 rpm 2 pole.Why this diffrence??? when we can generate electricity @ 600 rpm then Why we had incresed speed in NPP & TPP???

3 2862


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Un-Answered Questions { Electrical Engineering }

how pt is using

1068


3- What is the target from Zero Impedance, Single Phase Imp., S/C Imp. and magnetic balance tests?

1036


Define branch?

221


What is power distribution criteria for converting single phase unbalanced residential load to 3 phase star connected balance system. Does total KW converted to 3 Phase. Means Divided by root 3.

1392


Could the power factor on electrical system can affect the registration of the kwhr meter or the CT/PT? 

1069






In india, according to trade theory above 5 HP motor reqired star delta starter. But we R connect 11 KV motor with 14MW in Direct to line ( With VCB starter combination) Can U Guess, How it is possible ?????

1234


Safety of dry type transformer

967


I am EEE student i want to improve my core side skills.how cn i approach it?

1588


Meter p.t. ratio= 3×230/400 , c.t.ratio = 3×1 (2) A what is m.f.

921


High speed earth switch operation with diagram

1411


what is the prinsiple of dc motor and construction and working ,application of dc motor.

1010


why high speed tripping relay will be used in tripping circuit why not normal relay

471


why we use the 100% and 95% stator earth fault protection for the synchronus generator ?

1314


When we connect the large capacitor bank in series ?

238


how can motor both beasrings insulation resistance can be check?

1138