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Electrical Engineering Interview Questions
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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 6874

why the air gap is necessary in the transformer core

Eskom,

1 6116

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

Bhel, Electrical,

2 29093

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

Alstom, Torrent Power,

2 7509

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

TCS,

2 4496

what is the difference between capacitive and resistive voltage divider?

2909

what is the transformer

 5 5114

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

 2 3639

is earthing is necessary if we use armoured cable

ABB, Schwing Stetter, Siemens,

1 4886

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

Rolling Mill,

4 11157

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

 1 2825

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

 1413

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

APPSC,

4 5539

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

 2066

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

Sona,

1 3342

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Un-Answered Questions { Electrical Engineering }

What do you understand by external characteristics of a d.c. Generator?

635

at work i have a genertor/alternater what is the easyest way to work out if it is dc or ac?

1369

explain working principle of earth leakage relay

3062

HOW CAN YOU CALCULATE PRACTICAL EFFICIENCY OF A ASYNCHRONOUS INDUCTIONMOTOR OF 7.5KW,& MOTOR IS RUNNING WITH AVOLTAGE OF 410 VOLTS,& TAKING CURENT OF 13 AMPS

1418

What is ideal IR values for ground and neutral.

1284




what is the sludge current

1547

What is servo lock in CNC how they work and if any parameter for them in CNC machine

4780

WHAT IS THE TECHNICAL SPECIFICATION OF C CURVE & D CURVE LEGRAND MAKE MCB

2072

Direction of flow of active power and reactive power with logic?

1296

'documenˁ

1507

condition Autotrip facia come on control panel of electrical transmission line?

1083

what is the soft starter principle? how is connection diagram? what is the procedure for checking the connection?

1709

Merits & Demarits of Oil circuit & Air circuit breakers ?

1602

why we use condenser in the thermal power plant, althrough the same vapour will be again heated

3922

what happened when we supply a dc current in dc motor?? can it worked properly?

1452

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