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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

If the neutral wire go pass through the core balance current transformer? If yes then why? and no then why?

2 8811

What is the difference between power cable and signal cable (only Observation Difference)?

1 2902

why 3phase is 440v but where as we get phase voltage 220v,we have to get 220*3=660v.can u pleas give in detailed

Avantha Group,

3 8056

374kvar capacitor bank connected across 600kw,6.6kv motor.what will happen if motor run at 50% , whether full kvar applied or half?

NTPC,

1 2904

why reactive power control is required

5 4701

In Slip ring Induction Motor we use Liquid Rotor Starter for Starter Every Time Liquid Filling we need add Soda Sodium Carbonate or only Distilled water is Enough.

2 6715

Our Slip Ring Induction Motor Frequently tripped By Earth Fault While Starting time and in Normal Operation Time also Kindly Let me Know the Reason. Application Ball Mill - Cement Mill

1 2036

What is the basic difference between AVR and stabilizer?

Gujarat Alkalies and Chemicals GACL,

2 6588

which capacity of RCCB used for five thousand watt electricity load?

979

Is it advantages of having star-delta vfd than normal star vfd , if yes why?

1347

what is the principle of operation of tungstun bulb ??

991

what is the principle of operation of CFL ??

IOCL,

1761

what is the principle of operation of tungstun bulb ??

IOCL,

2 3920

what is the principle of operation of domestic fan?? what is the role of capacitor in it??

5 4832

what is the principle of tubelight ??? what is the function of starter and choke ???

1 3545


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Un-Answered Questions { Electrical Engineering }

What is the real function of reverse power relay in generator panel while syncronising?

1182


Is there possible to Test Transformer for Overfluxing Capability. Or is there any firm who does Overfluxing Test on Transformer?

2112


Whar is the KvA rating of 33Kv substation & actual kv rating of power generaating station.

1487


What is the need of earthing transformer for delta side of a transformer. (Think of a line section between a star/delta transformer at a grid substation and delta/star transformer at a village. An earthing transformer is there at the delta side of the star/delta transformer at grid substation). As there are no ground reference there will not be fault current if a one phase is grounded. Further L-L phase will be sensed by the primary side of star/delta transformer as a L-G fault. So why an earthing transformer is required at delta side

575


Dear all: Recently we got a question about Interface between PMS and SAP-PM.once we got a update message from PMS.we should set the deletional flag for functional location in SAP system.Is there any FM or BAPI to use?There are only functional location create and change provided by SAP. Best regards!

1173






how we will deside the high voltage value

1072


2- What are the percentages between excitation currents in phase (R, S and T) in ∆ and Ỵ connections in excitation Current test in transformers?

1171


I want to replace the 3 KW DC motor with AC motor so what should be the rating of AC motor? Details Of DC motor to be changed with AC are - Kw - 3, Vf - 310, If - 0.15, Va - 400, Ia - 13, RPM - 2400

982


If Polarization index of motor 8.75 at 500volts of medium voltage 4.16 KV motor what this mean winding good or bad pl answer if any reffrence book give me the link

1349


Define phase lag and phase lead?

239


how to calculate transformer turn primary & secondary side 11kv to 420v

1314


Why efficiency in thermal power plant is low?

252


what is frequency response?

248


What products have you designed which have entered high volume production?

1086


why 15 kw motor winding resistance is low then 5 kw motor winding resistance?

1596