Electrical Engineering Interview Questions

What is NGR . What is the purpose of 10 sec ,60 sec rating of NGR.

KOTC,

1289

If auto trip is operated, can you close the breaker.

2249

Why you are switching off arc protection mcb when you are taking shutdown for lv board.

1282

Why it is necessary to isolate fire fighting when you are taking shutdown for lv board.

1236

How you give clearance to a spare feeder.

1263

How to put breaker in service / test position.

2796

Operation of isolators.

1507

Load transfer in 11kv double busbar switchgear - operation.

1559

How to check the cable fault / hv test of transformer cable.

1457

How to do maintenance of transformer feeder.

1405

How to do maint. Of busbar.

3341

Single line diagram for dbb (double bus bar)system.

1534

Which type of arc protection devices used.

3263

How earthing of switchgear system to be done.

1509

What are options used for earthing the switchgear.

1400

Un-Answered Questions { Electrical Engineering }

Why current shoots up in the secondary on the knee point voltage during saturation test of CT? How core saturation effects the secondary current (while the primary side is open)? What the logic behind this?

1565

Draw a SLD of DG distribution up to main LT panel?

8910

How is the resonant peak, resonant frequency, and bandwidth determined from nichols chart?

728

What is the distance between each insulator in 33kv transformer and how can it calculate

1799

Hi My dear all Friends, There is a question regarding HVAC Engineering and widely used in Power Projects. Question- What is the diffrence Between REF, SEF and Differential Protection....???? Where REF - Restricted Earth Fault SEF - Senstive Earth Fault.

1767

in electrical control panel. how can i choose the cable rating. (example - 11kw motor, 18-25A mpcb}

2454

1. What is the exact formula for one weber? for example,(one ampere = one coulomb electron of electrons crossing a point of conductor at one second. i.e, 1A=1Q/1sec)

1467

What is difference between insulating medium and fault current interruption medium in a switching device.

1163

Pls tell me whether we can use EN3A material for shafts of Permanent magnet alternator.What will be the effect of magnetic and nonmagnetic material for shafts on magnetic properties of PM rotor .

3057

Thumb rule of cable size(rm>30 rm)X multiplying factor=ampere

1241

LET ME NOW MORE ABOUT icu and ics for circuit breaker. how we calculate the rating of circuit breaker and i c u and ics values

2490

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

1290

Why field rheostat is kept in minimum position while armature rheostat at maximum position?

669

is there any chart showing the suitable cable size according to AMP and length ? for three phase motors

1007

Why computer humming sound occurred in ht transmission line?

703