Electrical Engineering Interview Questions

to vary valtage from 0 - max a variac is necessary . so how to design for high power applications nearly about 200KW power

1505

how will reduce the voltage. if 12volt/250ma transformer toreduce 6 volt

1457

How you calculating the current for a 2.5 Sqmm cable. A 30 Hp 3 phase AC motor of power what size of cable is used for this motor.

21762

What is the difference between Ceiling Fan armature and Tablefan Armature or winding.

8736

If we connect capacitor in series DC supply so what happened?

8191

if we supply DC power to AC transformer then what its result?

13176

can d.c.transformer exist? if yes then what its max. rating?

6597

give me atleast four differences between circuit and network

1646

how to calculate the cable size

5649

why motor burns ?

7142

What is correction factor in Tan delta test?

7802

effect of single phase transformer on full load current?

3612

What happens with squirrel induction machines if the ends of rotor conductors are kept open? Explain

5759

How we can change the direction of rotation of Induction motor? Prove it using graphical methods.

5465

figure of phasor diagram of transformer when full load or no load ?

10989

Un-Answered Questions { Electrical Engineering }

define digital electronic

1479

how we test a 3 phase motor on single phase supply....? HOW WE RUN A 3 PHASE MOTOR ON SNIGLE PHASE. supply for testing..? how we verify of a 3 phase motors 6 wire & name thame a1/a2/a3..b1/b2/b3 and c1/c2/c3 for connecting star delta starter ........i have only 1 phase supply ? help forum..........

4294

What is meant by control system?

596

Define what is difference between fuse and breaker?

590

At the starting of dc motor and syn.motor and induction motor high current flowing through the winding. Due to this the windings burnt out. To avoid this different types of starters are used. But incase of transformer what Will be used (At starting no emf is induced in the primary winding)?

1469

Pl.brief me about Electrical power distribution system from Main generating station to Industry.What is the use of in between station.

1515

why the pf of semiconductor device is improved the electrical devices

1376

WHY IS THE EARTH FAULT CURRENT ALWAYS LESS THAN THE NORMAL CURRENT??

1685

what is the meaning of WYE and DELTA in Electric meter?

3270

what happens when series resonance occurs?

1324

What effect does a very low impedance have on the Voltage regulation? On the short-circuit current?

5750

1.what is the funtion of chiller primary & scondary pumps. 2.what is the use of distribution lines & Types. 3.what is the use the thermal power stations & how much capacity.

1452

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

can someone explain that how the speed of the protection system affects the fault level calculation?

1410

how a.c. genarator control power factor when its conected to grid supply by incrising or decresing excitation voltage.

2614