Synchronous Motors A synchronous machine with low value short circuit ratio has Good voltage regulation Lower stability limit Good speed regulation High stability limit Good voltage regulation Lower stability limit Good speed regulation High stability limit ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The induced e.m.f. in a synchronous motor working on leading power factor will be more than the supply voltage None of these less than the supply voltage equal to the supply voltage more than the supply voltage None of these less than the supply voltage equal to the supply voltage ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The efficiency of a properly designed synchronous motor will usually fall in range 85 to 95% 99 to 99.5% 60 to 70% 75 to 80% 85 to 95% 99 to 99.5% 60 to 70% 75 to 80% ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The standard full-load power factor ratings for synchronous motors are unity or 0.8 leading unity or 0.8 lagging unity or zero zero or 0.8 leading unity or 0.8 leading unity or 0.8 lagging unity or zero zero or 0.8 leading 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 minute One second None of the listed here One hour One minute One second 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 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 ANSWER DOWNLOAD EXAMIANS APP
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