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Electrical Engineering Interview Questions
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why we generate transmit and distribute electrical supply in multiple of 11

NHPC,

6 10005

why t/f are rated in kva. is it conserned with p.f.

 3 4373

Why X'mer rating in kva only?

 4 5916

Transformer/insulating oil tester(BDV tester)

 1 3640

Hysteresis loss in a core is due to what reason or property of the material used for that core?

 1 3793

Does the hysteresis loss is due to retentivity property of the material? or it is due to reluctance property?

 2 4547

how slip power recovery system work

Ambuja,

2539

Is there any other method of damping the oscillation in a synchronous motor other than using damper winding and if yes what is it?

IOCL,

2 5046

How much current can carry the 1 sq inch super enamelled copper wire?

 4 5805

as we know that N=120f/P speed of an im can be controled only through changing no if poles, can we control by changing the frequncy????

JSW,

7 8471

difference between torque mode and speed mode

JSW,

4 10065

diff. between tension mode & speed mode

BSL,

1777

my 10 hp submersible pump is tripping when connected through ELCB.I have checked the megger value of the coil's with body.It was found to be 0.2mega ohm.that is leakage is there.But when connected to mccb it is not tripping.no leakage current in the motor.Is it safe to connect to mccb? what are the problem's will arise if future?also tell me in ELCB no neutral is connected to motor.than how ELCB was working?

 1 6138

i am gng to visa interview this july i have 4 backlogs gre 1010,toefl 75,pls give me the tips pls pls

 1670

whatare the disadvantages occur,if the form factor of transmission will not be equal to 1.11

 1440

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Un-Answered Questions { Electrical Engineering }

what are factors to be consider to design a HT & LT motor?

1822

can we use CBCT in neutral of solidly grounded transformer? in place of three phases we can pass only one phase which decreases the size of CBCT?

1780

what is counter poise conductors

1682

What is Faraday's law

1056

I HAVE A INCOMING 100A MCCB TPN 25KA, CABLE LENGHT OF 80M 70MM CABLE SIZE FROM MAIN SUBBOARD TO NEW DB.BASE ON THE FAULT LEVEL SETTING OF 45KA.I WOULD LIKE TO FIND OUT 25KA ENOUGH KA. APPRECIATE IF SOMEBODY CAN ASSIST ME WITH FORMULA FOR THIS. FRM: JEFF

3524




Application Comparison between 22KV (UE)and 33KV (E) system. Are we allowed to use 33KV (E) cable in lieu of 22KV (UE) cable. What are the technical disadvantages.

1847

What is inrush current? how can calculateit? what is the affect of it?

1547

what is reactive power?, why its measured in VA ? is it transient behavior of system?

1799

In what condition the HT fuse breakes?

1496

Where servomechanism is used?

642

how we decide the require size is this for a known current at fuu load?

1434

how to choose cable size with respect to load? how to convert cable size in mm2 to sq.mm?

4844

Why does the adjacent zone of protection overlap?

700

what is the minimum clearance between a 11KV 150KVAR capacitor cell and series reactor.can a series reactor can be mounted in the same structure of the capacitor cells structure

1739

what is star delta starter? how it works? give its control and power diagram.

1618

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