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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

In a 11KV 3phase system do you need to earth both sides of the cable?

 2 4984

what is Insulation monitoring device. where it is used? (in switchgear room or control panel or in field equipment)

 1600

what is the main difference between simplex RTD and Duplex RTD?

 6 73682

by using pump duty, how we will can calculate the motor duty(KW)? is there any standard or formula.

HP,

1443

why most of junction box vendors providing T5/T6 Temp class jb's for T3 area any special reason?

 1536

what will be the motor terminal box connection arrangement (star or delta). on what basis it decided?

 3 7930

what happens if the phase sequence of parrlel connected sys will changed & phase displacement

 1 2802

What is the actual formula for transformer short circuit test? below i given rating of the transformer.. 1000KVA, pri 11KV, Pri amp 56A. %Z 5.95..

2 5213

What do you mean by per capita requirement of electrical energy in india

Tech Mahindra,

1582

why cant we use earth as neutral at home whereas neutral is actually grounded at transformer end?

 4 5956

What is meant by a stray loss of a induction motor??? What is the equation to find it

 2502

when a airgap of the induction motor gets larger does it draw more current ??? does it power factor gets lower?

 3 3955

how to maintain frenquncy with syncronising sub-station for distribution

Suzlon,

1596

use of choke in APFC panels

Kemrock,

2 4758

What is the de rating factor of cable? What is the importance of the de rating factor in cable select

 1810

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Un-Answered Questions { Electrical Engineering }

What is resonant peak?

606

In motors how many types of cooling systems were used?

1510

can we make a electric generator,which can not use any type of fuel,air,solar,gas,thermal,coal,petrol,etc and able to produce electrical energy (or self electricity generating generator)

1434

Vibromotor 252MV 1/4HP2P..what is mean by 252MV?

1429

why ahould you show client/engineer activities clearly on the project plan

2253




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1513

What is minimum phase system?

592

During underground cabling in landscape area what did we cover the cable with to prevent the electric shock & protect the cable?

1338

If I want to replace a 26KW Slip ring Motor with a Squirrel Cage motor & Drive (for a Hoist Application). How can I approximate the Motor & Drive HP required in new Setup.

1753

what is the minimum recommended leakage current of an earthed cable connected to the body or skid of an alternator

1488

What is transformation ratio what it describes?

1112

How 3 phase invertor works?

1417

what is the problem when i want to close a circuit breaker by local position it closes well.but when i close it in remote position it trips

1019

What is meant by reactance voltage?

549

during installation time of transformer and alternator which points we have to observed?

1423

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