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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

IN star -delta motors normally first operated in star mode {absulated given (r-y-b) phases after one miute change in delta mode in this case i am change phase sequience for example R -PHASE TO CHANGE Y-PHASE ;Y-PHASE TO CHANGE R-PHASE SO THIS TIME MOTOR WILL HAPPEN RUNNIG MODE EIGHTER(OR) STOP MODE(TRIP MODE)

MacLellan,

6 8692

why the air gap is necessary in the transformer core

Eskom,

1 6927

what is difference b/w squirrel cage rotor and wound rotor

Bhel, Electrical,

2 30117

what is the RMU and RMU system in sub-station(11kv,66kv.....)

Alstom, Torrent Power,

2 8596

why only dc is given as excitation...why not ac???

TCS,

2 5395

what is the difference between capacitive and resistive voltage divider?

3459

what is the transformer

5 6475

Is there any design in the world a 220 KV transformer without breather …??????

2 4580

is earthing is necessary if we use armoured cable

ABB, Schwing Stetter, Siemens,

1 5702

how do we select a copper power cable for a 10 HP, 1440 rpm, 440V, 3 phase AC motor?

Rolling Mill,

4 12541

How can ignition voltage of light increased with the help of a ballast

1 3453

Can anyone explain me about the RLC based Impulse high voltage generator and how to and operation of Series resonant High voltage reactor...?

1900

what are the changes made in induction motor so that it act as induction generator

APPSC,

4 7047

what is the function of bearing in dc mchine" and where it is placed

2539

make control wire diagram of start and stop a function with a single push button

Sona,

1 4017

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Un-Answered Questions { Electrical Engineering }

For overhead protection we use which transformer?

2429

Please explain me about Relay curves and their sources to read ?

1769

How does an induction motor start?

1162

what is the difference between interconnection and intraconnections in the circuit diagrams

8349

I want to ask that is there any relation between current denesity of copper and material purity. also is ther any standard which defines the standard current denesity of material.

1914

A ii kv 1200 A Breaker combination fixed in a cubicle. How many ampere Fuse is required? If fuse is not using, Why?

1937

why i can not use thimble on capacitor duty contactor

1321

what's the difference between abs/inc encoders. apart from the position remembrance what are all the other differences. and what's mean by grey code.

2036

what are the basic insulation levels & what its Unit

1966

How to detect voltage vector shifting in interconnection protection.

1860

Define peak time.

1094

what is the difference between gas group b and gas group c electrical equipment construction wise?

1822

why should the primary of transformer be connected in delta in a heat run test?

1937

how the speed of the gets motor regulated. does it draw the same current on the all speed level.

1953

How to calculate Number of Earthing Pits....???

1546

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