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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What is the different between feeder & bus?

IOCL,

3 16198

what is the purpose of taking HV test in LT panel.

PCE,

1 5761

In EDO ACBs what is a purpose of closing coil and motor, what is the operation of these devices are they inetconnected. means if we give supply to motor and by BCS we charge Closing coil,what exact is operation is and how it charge a spring of ACB. Sir if anybody has an wiring diagram please send me the link to operate and EDO breaker.

PCE,

1409

We use MCCB not MCB for motor starters because MCCBs has capablity to drawout the motor starting current which is 5-6 times the full load current of motor for 1sec. Then why we use SDF in starter panel means MCC panels. Pls reply if any one knows this answer.

1 1669

After doubling voltage from solar cells & use step down voltage transformer can we get high current output with low voltage.

Transco,

1318

What happens instead of using 3 phase, if we give loop of single phase to all three phases ??

1 3286

What difference between TRANSFORMERS and TRANSDUCERS???

1 16666

What is skin effect?

2 3510

Dry type transformers

1212

description about dry type transformers

1304

oil cooled transformer

Jindal,

1586

how to define vector group of transformer

Engro, Reliance, TATA,

1 4554

What is the purpose of reactor in over head transmission line.Can you any explain it.

Dr Reddys, L&T, Reddy Labs,

2 3640

What are protection of power transformer?

1 3244

How to Select transformer for 100HP motor plz... With calculation

Rasandik,

2 3789


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Un-Answered Questions { Electrical Engineering }

how can i improve the power factor in domestic (230v)

1361


3phase cable calculation formula by motor load

837


it is possible to rotate the DG engine dc starter with wrong polarity connections? why?

1583


why surge protectetor work explain with the help of circut diagram?

1356


What do you mean by cogeneration? What its working principle?

2578






what is the total power generation in india?

1509


what exactly commisioning work does in electrical site work... LT side?..

1336


What is electrical earthing?

483


How many types of electric motors are there?

473


Why derating factor os applied on Cables?

1348


Why do we need a separate control desk & PLC control panel in Boiler plant or coal handling plant? Can we provide cost effective Control desk cum PLC panel. Is there is an specific need for control desk.. kindly advice.

1700


how to maintain frenquncy with syncronising sub-station for distribution

1487


how to test reverse power trip?

3504


While testing a ZCT what parameters have to check or measure?

1718


what is the purpose that we use PLC system in power system

3867