DC Motors In the dc motor the iron losses occur in Armature Field Commutator Brushes Armature Field Commutator Brushes ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following losses are significantly reduced by laminating the core of a D.C. generator? Windage losses Eddy current losses Copper losses Hysteresis losses Windage losses Eddy current losses Copper losses Hysteresis losses ANSWER DOWNLOAD EXAMIANS APP
DC Motors Excessive sparking at brushes may be caused due to Dirt on the commutator Misaligment of machine Loose coupling Worn bearings Dirt on the commutator Misaligment of machine Loose coupling Worn bearings ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following motor has the poorest speed regulation? Differentially compound motor Shunt motor Cummulative compound motor Series motor Differentially compound motor Shunt motor Cummulative compound motor Series motor ANSWER DOWNLOAD EXAMIANS APP
DC Motors As there is no back e.m.f. at the instant of starting a D.C. motor, in order to prevent a heavy current from flowing though the armature circuit Armature is temporarily open circuited A resistance is connected in series with armature A resistance is connected parallel to the armature A high value resistor is connected across the field winding Armature is temporarily open circuited A resistance is connected in series with armature A resistance is connected parallel to the armature A high value resistor is connected across the field winding ANSWER DOWNLOAD EXAMIANS APP
DC Motors By putting controller resistance in series with the armature of a dc motor, we can obtain speeds Above the normal speed only Above as well as below the normal speed None of the listed here Below the normal speed only Above the normal speed only Above as well as below the normal speed None of the listed here Below the normal speed only ANSWER DOWNLOAD EXAMIANS APP
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