Synchronous Motors A synchronous motor runs at speed ranging from ______ 3600 to 6000 rpm 150 to 1800 rpm None of the listed here 1800 to 3600 rpm 3600 to 6000 rpm 150 to 1800 rpm None of the listed here 1800 to 3600 rpm ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Hunting in a synchronous motor can not be due to Windage friction Variable frequency Variable supply frequency Variable load Windage friction Variable frequency Variable supply frequency Variable load 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 less more equal twice less more equal twice ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Damper winding in a synchronous motor________ Increases hunting of the motor Improve pf of the motor Reduces windage losses Serves to start the motor Increases hunting of the motor Improve pf of the motor Reduces windage losses Serves to start the motor ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The ratio of starting torque to running torque in a synchronous motor is Zero Two One Infinity Zero Two One Infinity ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The angle between the rotor poles and stator poles, in a synchronous motor, is known as Power factor angle Angle of retardation Torque angle Synchronising angle Power factor angle Angle of retardation Torque angle Synchronising angle ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS