Electrical Machines What are the starters used for starting of cage motors? Auto transformer starter. Star-delta starter. All of these. DOL starter. Auto transformer starter. Star-delta starter. All of these. DOL starter. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The rotor slots are slightly skewed in squirrel cage induction motor to decrease the amount of copper to be used. provide ease of fabrication. reduce the magnetic hum and locking tendency of rotor. increase the strength of rotor bars. decrease the amount of copper to be used. provide ease of fabrication. reduce the magnetic hum and locking tendency of rotor. increase the strength of rotor bars. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Unbalance 3 - Φ stator currents cause double frequency currents in the rotor. vibrations. heating of rotor. All of these double frequency currents in the rotor. vibrations. heating of rotor. All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following is/are the advantages of carbon brush over the copper brush? They are not hard as copper brush In case of any sparking they will be less damaged than copper brushes All of these They are self lubricating in nature They are not hard as copper brush In case of any sparking they will be less damaged than copper brushes All of these They are self lubricating in nature ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In induction motor when the length of the air gap is increased, the magnetizing current of the motor increases while the short circuit current __________________. increased. remains unchanged. kept constant to certain value. decreased. increased. remains unchanged. kept constant to certain value. decreased. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motors is/are widely used? squirrel cage induction motor either of these slip ring induction motor None of these squirrel cage induction motor either of these slip ring induction motor None of these ANSWER DOWNLOAD EXAMIANS APP
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