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Electrical Engineering Interview Questions


Electrical Engineering Interview Questions

Questions: 80
Comments: 167
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 Electrical Engineering Interview Questions
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How does a AC drive work? Why does not AC motors blow up when testing dead short but it would if you put DC on it? 
View Question | Asked by : benkeny

Can differential protection operate while its only one side is energized or being energized (HT side in this case)? When trying to energize a 132/11KV t/f from HT side when its differential protection 
View Question | Asked by : speedtronic

Why CTs are connected in star on T/F delta connected winding side & in delta on T/F star connected winding side for T/F differential protection?  
Latest Answer: This is in order to compensate for phase shift due to Star/Delt or Delta/Star connections of primary and secondary windings. Becuase if the phase shift is not compensated, differential protection will operate. ...

View Question | Asked by : ranjith222


Why do we rate transformer in KVA not in KW? 
Latest Answer: since the losses in transformers are mostly due to copperlosses and corelosses  which in turn  depends on  current  and voltage ( ie.,  copper loses is nothing but i^2R losses depends on current and core losses v*i depends on ...

What do you mean power factor?What is the use of Power Factor? 
Latest Answer: Power factor is the ratio of Active ppwer to apparent power in sysytem,It is an index to see how much of the energy is actually being utilized to do useful work ...

Why do we use delta connected capacitor bank in a self excited induction generators and not star connected capacitor bank? 

What is the difference between a capacitor and a condensor? 
Latest Answer:   HAI                The work is same but the condensor is used in fans to have a leading factor capacitor are used in single phase motors etc ...

What do you mean by traction system, What type of traction system is used in electric train. 
Latest Answer: traction systemmeans the system which provide the means of transportationtraction may be of a.c or d.c motor employes a.c & d.c motor respectivly ...

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