Synchronous Motors A synchronous motor is a ______ motor. Variable speed None of the listed here Variable pf Singly fed Variable speed None of the listed here Variable pf Singly fed ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The speed of a synchronous motor can be changed by varying _______ Mechanical load Field excitation None of the listed here Supply frequency Mechanical load Field excitation None of the listed here Supply frequency ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The duration of sudden short circuit test on synchronous motor is usually about One minute None of the listed here One second One hour One minute None of the listed here One second One hour ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When load on a synchronous motor is increased, its armature current is increased provided, it is ______ Over-excited Normally excited All of these Under-excited Over-excited Normally excited All of these Under-excited ANSWER DOWNLOAD EXAMIANS APP
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 more equal less twice more equal less twice ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The armature current of a synchronous motor will be minimum for ______ power factor. 0.8 lagging 0.8 leading Unity None of the listed here 0.8 lagging 0.8 leading Unity None of the listed here ANSWER DOWNLOAD EXAMIANS APP
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