DC Generators To avoid formation of grooves in the commutator of a D.C. machine Brush position has no effect on the commutator grooving All of these The brushes of opposite polarity should track each other The brushes of same polarity should track each other Brush position has no effect on the commutator grooving All of these The brushes of opposite polarity should track each other The brushes of same polarity should track each other ANSWER DOWNLOAD EXAMIANS APP
DC Generators The rapid wear of brushes takes place due to All of these Excessive spring pressure Abrasion from dust Rough commutator bars All of these Excessive spring pressure Abrasion from dust Rough commutator bars ANSWER DOWNLOAD EXAMIANS APP
DC Generators The field structure of a dc machine uses ______ Salient pole arrangements None of the listed here None salient pole arrangements Both salient and non salient pole arrangements Salient pole arrangements None of the listed here None salient pole arrangements Both salient and non salient pole arrangements ANSWER DOWNLOAD EXAMIANS APP
DC Generators In dc generator, the constant losses is equal to Mechanical losses None of the listed here Stray losses Stray losses plus shunt cu loss Mechanical losses None of the listed here Stray losses Stray losses plus shunt cu loss ANSWER DOWNLOAD EXAMIANS APP
DC Generators The main factor which leads to unstable parallel operation of flat and over compounded generators is unequal series field resistances unequal number of turns in their series field windings their rising voltage characteristics unequal speed regulation of their primemovers unequal series field resistances unequal number of turns in their series field windings their rising voltage characteristics unequal speed regulation of their primemovers ANSWER DOWNLOAD EXAMIANS APP
DC Generators The critical resistance of the D.C. generator is the resistance of Load Armature Field Brushes Load Armature Field Brushes ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS