Synchronous Motors When load on an over-excited or under excited synchronous motor is increased, rate of change of its armature current as compared with that of power factor is less equal twice more less equal twice more ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor will always stop when Load in motor varies Supply voltage frequency changes Supply voltage fluctuates Excitation winding gets disconnected Load in motor varies Supply voltage frequency changes Supply voltage fluctuates Excitation winding gets disconnected ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The armature current of a synchronous motor will be minimum for ______ power factor. Unity 0.8 leading None of the listed here 0.8 lagging Unity 0.8 leading None of the listed here 0.8 lagging ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The duration of sudden short circuit test on synchronous motor is usually about None of the listed here One hour One second One minute None of the listed here One hour One second One minute ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The standard full-load power factor ratings for synchronous motors are unity or 0.8 lagging zero or 0.8 leading unity or 0.8 leading unity or zero unity or 0.8 lagging zero or 0.8 leading unity or 0.8 leading unity or zero ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors By which of the following methods the constant speed of a synchronous motor can be changed to new fixed value ? By changing the load By changing the supply frequency By interchanging any two phases By changing the applied voltage By changing the load By changing the supply frequency By interchanging any two phases By changing the applied voltage ANSWER DOWNLOAD EXAMIANS APP
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