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Electrical Engineering Interview Questions

low voltage distribution is done by a)3 phase 3 wire b)3 phase 4 wire c)single phase

3177

why u want to work in sail/ntpc as u r already in an it company where life is good, good environment no much tensions etc?

Sail,

11731

% voltage variation in distribution a)1% b)5% c)10% d)15%

2311

which turbine has high thermal efficiency a)open gas turbine b)close gas turbine

2211

What is the application of Dyn1 and Dyn11 vector group of transformer?

1983

why we r used DC megger insted of AC megger?

2318

Simple calculation of improving power factor?

5261

What is the physical significance of phase.. i.e. what is exactly the meaning in layman's language.. 1 phase, 3 phase etc ???

L&T,

1253

WHY THAT THREE COLORS CHOOSEN IN 3 PHASE? WHAT IS MEAN BY RYB?

4269

how many bulb of 60watt at 300volt is used to maintain 0.25 amp.with valid reason?

3854

What happen if ac supply is fed to rotor of the alternator?

2170

When dc supply is fed to rotor of the alternator how it work?

1108

When a fourth resistor is connected in series with three resistors, the total resistance

ITI,

4836

When one of three series resistors is removed from a circuit and the circuit is reconnected, the current

2394

All the voltage drops and the source voltage added together in a series circuit is equal to

2450

Un-Answered Questions { Electrical Engineering }

how can we phase identification in a distribution line,how we recognise that which phase is coming for a house hold connection.help me............

1154

How can ou verify the size of conductor 50Sq.mm ACSR

988

we have require a Motor (1500kW, 6.6kV, 50Hz) which shall operate at 1500rpm during 30min and after it shall run on 500rpm during 15min. The same cycle shall be repetitive during the whole working days. Which method is best and economic to achieve such type of task. VFD, VVFD, Pole changing motor etc.

1082

why is the conservator tank painted white on the transformer

1895

how to failure indution motor insulation & how to improve heat in motor insulation

1004

hi frenz,its aswathy.i hve aplied for the hpcl test on feb,pls send the test patern & the placement papers as soon as possible. mail-id :kjaswathy@gmail.com

944

What is the procedure/activities to be taken to inject the current more than 2000A by using 2000A Loading Transformer?

1174

Can we indroduce the principle of single phase induction mator to Transformer? i.e. by Producing rotating flux in the transformer.

1327

How to select a contactor? How many types of contactors are available

2338

what is the size of ht cable of 33kv ht line and transformers ratings are 1 Mva and 5mva.please send formula also.

546

is it possible to say motor horsepower number without seeing name plate(when name plate damaged)

3185

What is the most accurate way of testing ELCB?ELCB is better than RCD?

2391

What is the comparison of PILC and XLPE cable

888

What happens if we give the supply to the rotor of induction motor and make its terminal shorted?

2273

What is open delta Xformer? It's adavntages & Use?

1273