Synchronous Motors The duration of sudden short circuit test on synchronous motor is usually about One second One minute None of the listed here One hour One second One minute None of the listed here One hour ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The construction of a synchronous motor ressembles An induction motor A series motor An alternator A rotary converter An induction motor A series motor An alternator A rotary converter ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When a unity pf synchronous motor is operated at a leading pf, it results in _______ More than rated horseppwer output None of the listed here More than rated rotor current Less than rated horsepower output More than rated horseppwer output None of the listed here More than rated rotor current Less than rated horsepower output ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor connected to infinite bus-bars has at constant full load, 100% excitation and unity power factor. On changing the excitation only, the armature current will have leading power factor with under-excitation lagging power factor with over-excitation leading power factor with over-excitation no change of power factor leading power factor with under-excitation lagging power factor with over-excitation leading power factor with over-excitation no change of power factor ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The rotor of a synchronous motor is Nonsalient pole type Identical to that of a dc motor Salient pole type None of the listed here Nonsalient pole type Identical to that of a dc motor Salient pole type None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Dust and dirt accumulation on motor winding will result in Rise in winding temperature Eddy current flow Increased core losses Shorting of coils Rise in winding temperature Eddy current flow Increased core losses Shorting of coils ANSWER DOWNLOAD EXAMIANS APP
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