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Electrical Engineering Interview Questions

What is the difference between air & vaccum circuit breakers?

IOCL,

4878

What are the components of a substation?

IOCL,

3952

What is ELCB?

Bhel, CDS, IOCL,

9439

How voltage step down is done?

IOCL,

4002

How does a 3 phase induction motor is started?

IOCL,

4581

can anyone tel me what is competency of electrical supervisor??

ONGC,

3080

minimu size and length of gi earth pipe

3202

we have consol make 3 phase servo stabilizer for cnc m/c. while installing the earth neutral voltage is 1.7 volts at stbilizer off condition and when stabilizer get on en voltage reaches 4.8 volts (new earthing is done and neutral is helthy condition all phase to neutral volts 440,442,441 v)why this happen.solution for cause.

4575

how to calculate the over current rating of 3phase motor

4683

why sec of ct should be kept shorted

4393

difference between isolator and circuit breaker?????

9592

how to improve IR value in HT motors?

13841

Why we are using air gap magnetic condutors

Ford, IOCL,

4771

I want to know how to calculate the size of electricity cable in building?

1153

whether Transformer is singly excited or doubly excited machine?

6142

Un-Answered Questions { Electrical Engineering }

model question paper for supervisor trainee

1176

How can i get my certificate of competency as an electrical supervisor? I have complicated my B.Tech from Uttarakhand technical university this year (2012).

3586

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

1170

What is the dependency of stiffness on load angle??

283

What is the function of interposing current transformer?

214

Define demand factor?

248

why we use 630mm single core cable for transformer secondary side and why two neutral cable

897

why Induction Generators are not "Black start" ? and apart from WTGs where this types of generator are generally used?

1818

What is the exact minimum vale of voltage between an earth and netural which can damage or can do malfunction of the electronic equipments ? If this is mentioned in any book, pl.give reference.

1381

what is meant by neutral compensation factor and where it is used

1070

Why are the cores of large transformers built up of circular transactions ?

1152

what are your career plans upon completion of the programme and the relevance of recity generation to your professional development?

1289

What is the difference between earth fault protection of motor feeder with CBCT and Without CBCT ?

1818

in Telecom DC system-why positive +ve is made earthed.and - ve is fed to load.

1571

Can u explain : what is supply for train (whether a,c or d.c ).I know that supply is 25000v a.c .But there is rumour that supply is D.C. And also explain how lights and fans inside the trains are working ,and what type of motors are used in trains whether D.C motors or induction motors .If d.c motor, how it gets supply.If traction motors are used then what are traction motors and its functions and how it differs from other motors and also explain about locomotive . y d.c series motor in train.train wheels r driven by D.C shunt motor ,at what voltage,and at what speed. please reply..............

1012