Why we use duplex coil and hook switch in telephone system?


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More Electrical Engineering Interview Questions

mostly the questions were from machines... d.c. machines, transformer, synchronous and induction all theory paper........ few from power system... but the level of paper was easy.....

0 Answers   IFFCO,


We've 2 diffrent DG's with same capacity (500 KVA). Can we sync them ?

1 Answers  


how we provide neutral earth on synchronising panel as per electrical standards?

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if the synchronizing b/w generator and busbar not complete and we close the out going circuit breaker of generator then what happen ?

4 Answers  


Whether cable is designed for different fault currents?

1 Answers   DAE,






Upto what extend the powerfactor of a supply system can be improved to be cost effective?

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difference between synchronous reluctance motor and switched reluctance motor

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what is meant by trivector meter?

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How we detect the leakage current of 11 KV H.T. motors and waht is the maximim limit?

3 Answers   Ambuja, Pristine,


What is derating?, Why it is necessary, it is same for all means for drives, motors,and cables.

1 Answers  


what is difference b/w squirrel cage rotor and wound rotor

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What are operating procudures & Safety precautions to be observed while operating OLTC in manual mode ?

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