Electrical Engineering Interview Questions

can any one tell me about the Extra low voltage systems?From where we give supply to these type of systems??

MCB,

1449

How the power factor is more in high speed machines

2601

what is DRP panels?

SECL,

1576

Why we say three phase voltage 440v.

VDP,

3941

if the field circuit of a d.c. shunt motor running without load gets opened, then the motor will

4209

Generally we denote power in 'p',voltage in 'v'but why can't we denote current in 'c' instead of I.

Bhel,

9831

why do we prefer alternating current in india where as in USA prefers DC?

Bhel, GMR, Texmo,

6825

What will happen if 33 kv is given to a 11/0.415 kv Distribution transformer?

SECL,

4114

For an 100kw generator, only 50kw of load is connected. Will the generator generate only 50kw or 100kw. If it generate 100kw what happens to rest of the 50kw. What happens if we connect more than 100kw of load?

L&T,

5323

What is the difference between earth and neutral

7586

what is a,b,c,d checks diesel generator?

AFMC,

2866

what is alluminium arm in ab conductors

1432

WHAT HAPPEN WHEN A DROP OF WATER MIXED UP WITH TRANSFORMER OIL ?

6390

What is the difference between AC and DC injection methods for rotor earth fault protection

1610

Why collecting electrode of ESP to be earthed

NBVL,

1544

Un-Answered Questions { Electrical Engineering }

Do Phase angle measurement have any application in freq/harmonics measurement? If so how?

1385

What is the meaning of dedicated earthing?

1474

can u describe the method used for protection of transmission line.

1552

Work done in a free expansion process is

629

Dg pf .71 i am improve pf 0.80 what capacitor connected in dg how?

1178

why the making current is more than then the breaking current and if its true then its about a controling circuit or breaker power contact points

1559

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

3966

what is the purpose of silicon dropper used in battery charger?

6466

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

1450

how to deside the capacity of chock for drive?

1548

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

562

What are the causes of unbalanced current on 34.5kv feeder Ia=0.05,Ib= 0.25, Ic=0.15 and In=0.27 prior to tripping current are balance?

1258

What is a Phase shift meter? Where can I get one?

1576

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

1431

How to calculate flow of water delivered by pump when pressure & size of pipe line is given

1714