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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

what is lowest system voltage?

Apex Holdings,

7 8795

only three phases are coming in step down tranformers.how to get neutral?

5 8800

New istallation how many eathing have one transformer? Names of earthing connect places?

10 29325

a bulb of 100W and anather bulb of 200W , rated supply voltage 230v.when supply voltage is reduced to 100v,which bulb will give more light? and why with calculation?

12 36221

if the diameter of a conductor is 'R' then what is the distance between two bundle conductor in a phase?

NTPC,

1 3896

transformers parts & function of each parts

Amara Raja, Bhutan Ferro Alloys Limited, Breather, Electrical, Electrical Tech, ERDA, GVK, Juniper Networks, Matrix, Mechanical, NFL, Oracle, Pyramid Plastics, RPPL, RRB, Siemens, TCS, Tulip Silk Mills,

25 403709

in single phase we get 220 volt and in three phase 4420 v why this second Ques= in case three phase star conection our neutrul becom disconect what happan 3 Q=== a three phase house load and have unbalce load on different pahse diffrent current eg phase a 7A b 8A c 5A and voltage is 440 than how calculate it total load in kw pl give formula thanks

8 11963

WHAT IS SEMICONDUCTOR? EXPLAIN DETAIL. FOR EXAMPLE TAKE A PENCIL.THE LEAD IS MADE UP OF GRAPHITE IT IS A CONDUCTOR.THE OUTER COVER IS MADE UP OF WOOD IT IS INSULATOR.PENCIL IS A SEMICODUCTOR MATERIAL.

5 15967

what is Aircraft earthing and what does it do?

6 27095

Why is the diffrential protection in DG. What if the CT polarity is reversed while connecting for the same type of protection? How polarity can be made ok?

1 6392

what is corona effect?

ABB, Genco, Wipro,

39 95664

what is CT class? depending upon which it is classified?

Siemens,

3 8413

what is automatic voltage regulator and it is used?

ACME, TCS,

28 58796

what is meant by form factor and hoe related with the HT transmission voltage

2 7913

How to make vector group test of transformer?

2 8398

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Un-Answered Questions { Electrical Engineering }

What are two contours of nichols chart?

1083

How is the connection of the tap changer on the HV side been made?

1973

what is the size of cable for 15kw motor and 85 meter cable length using with vfd

2364

What are dependent sources?

1177

define displacement & magnitude ?

1840

what is the calculation involved to design the heater to heat 10KL of water in temperature control unit?

1930

what is settable hystersis protection? If any body knows plz kindly post the answer..

2051

What magnetic circuit is formed in berry-type constructions and why?

1068

why and where we use early make & late break contacts in protection?

8317

What is the rotor frequency of 10 Hp 1440 RPM 50HZ 415V ?

1923

What is the difference between amorphous core transformer and CRGO core transformer?.

3737

Difference between low impedance and high impedance Restricted Earth Fault

3120

What is the tests required for a 132 kV, 400 kV , 765 kV for a Circuit Breaker and Power Transformer before commissioning ?

1576

The 3 phase Delta connection RB=440V, BY=350V,.......* is Line to Line voltage RY= ? And Formula....?

1714

how many joints are allowed in underground HT cable of 1 KM

1877

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