Synchronous Motors A three phase synchronous motor will have Three slip rings No slip rings Two slip rings One slip rings Three slip rings No slip rings Two slip rings One slip rings ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The efficiency of a properly designed synchronous motor will usually fall in range 60 to 70% 75 to 80% 99 to 99.5% 85 to 95% 60 to 70% 75 to 80% 99 to 99.5% 85 to 95% 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 applied voltage By changing the supply frequency By interchanging any two phases By changing the load By changing the applied voltage By changing the supply frequency By interchanging any two phases By changing the load ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In a synchronous motor which loss varies with load ? Copper loss Windage loss Bearing friction loss Core loss Copper loss Windage loss Bearing friction loss Core loss ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors For power factor correction, synchronous motors operate at normal load with zero excitation no-load and greatly over-excited fields no-load and under-excited fields normal load with minimum excitation normal load with zero excitation no-load and greatly over-excited fields no-load and under-excited fields normal load with minimum excitation ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The speed of a synchronous motor can be changed by varying _______ Supply frequency Mechanical load None of the listed here Field excitation Supply frequency Mechanical load None of the listed here Field excitation ANSWER DOWNLOAD EXAMIANS APP
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