Synchronous Motors While running, a synchronous motor is compelled to run at synchronous speed because of _______ Damper winding in its pole faces Compulsion due to lenz's law Magnetic locking between stator and rotor poles Induced emf in rotor field winding by stator flux Damper winding in its pole faces Compulsion due to lenz's law Magnetic locking between stator and rotor poles Induced emf in rotor field winding by stator flux ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The pull out torque of a practical synchronous motor will occur when the torque angle is about _____ 0° 45° 75° 30° 0° 45° 75° 30° ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Which of the following motors is non self starting? Wound rotor induction motor Synchronous motor Squirrel cage induction motor Dc series motor Wound rotor induction motor Synchronous motor Squirrel cage induction motor Dc series motor ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors If one phase of a 3 phase synchronous motor is short circuited, motor Will fail to pull into step Will not come upto speed Will overheat in spots Will refused ro start Will fail to pull into step Will not come upto speed Will overheat in spots Will refused ro start ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Most of the synchronous motors are _______ power factor metors. 0.5 leading 0.8 leading 0.8 lagging Unity 0.5 leading 0.8 leading 0.8 lagging Unity 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 More than rated rotor current None of the listed here Less than rated horsepower output More than rated horseppwer output More than rated rotor current None of the listed here Less than rated horsepower output ANSWER DOWNLOAD EXAMIANS APP
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