DC Generators The rapid wear of brushes takes place due to Rough commutator bars Excessive spring pressure Abrasion from dust All of these Rough commutator bars Excessive spring pressure Abrasion from dust All of these ANSWER DOWNLOAD EXAMIANS APP
DC Generators The effect of armature reaction is to Decrease the total flux None of the listed here Increase the total flux Make the air gap flux uniform Decrease the total flux None of the listed here Increase the total flux Make the air gap flux uniform ANSWER DOWNLOAD EXAMIANS APP
DC Generators Open circuited armature coil of a D.C. machine is Both of the listed here Indicated by a spark completely around the commutator None of these Identified by the scarring of the commutator segment to which open circuited coil is connected Both of the listed here Indicated by a spark completely around the commutator None of these Identified by the scarring of the commutator segment to which open circuited coil is connected ANSWER DOWNLOAD EXAMIANS APP
DC Generators The armature of dc generator is laminated to Provide the bulk Insulate the core Reduce eddy current loss Reduce the bulk Provide the bulk Insulate the core Reduce eddy current loss Reduce the bulk ANSWER DOWNLOAD EXAMIANS APP
DC Generators The coupling field between electrical and mechanical systems of a dc machine is ______ Magnetic field Both electrical and magnetic fields None of the listed here Electric field Magnetic field Both electrical and magnetic fields None of the listed here Electric field ANSWER DOWNLOAD EXAMIANS APP
DC Generators The field structure of a dc machine uses ______ None of the listed here Salient pole arrangements Both salient and non salient pole arrangements None salient pole arrangements None of the listed here Salient pole arrangements Both salient and non salient pole arrangements None salient pole arrangements ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS