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BSNL Electrical Engineering Interview Questions
Questions Answers Views Company eMail

1.After synchronising the alternator to the grid,how we r delivering power to the grid?if the i/p increases does the speed hence frequency increases? 2.y the power factor is changing when exitation changes?what is the relation with p.f and flux?

4 7377

how the calculation is done if the DG set require for the -- -48 to -51v 4000 ah battery set .

1 2818

RESISTONS R1 AND R2 in parallel = Total R.? 1-R=R1+R2 2-R=1/R1 + 1/R2 3-1/R + R1+R2 R=R1R2/R1+R2 select one

2 2148

The coils having selfinductancs 10mh and15mh,effective inductance 40mh when connected in series aiding. what will be the equivalent inductance if we connect them in series opposing?

875

if main CT is of ratio 50/5, and meter CT is -/5 what will be overall multiplying factor of meter.PT is 11000/110 .

676

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