DC Generators The rapid wear of brushes takes place due to Rough commutator bars Abrasion from dust All of these Excessive spring pressure Rough commutator bars Abrasion from dust All of these Excessive spring pressure ANSWER DOWNLOAD EXAMIANS APP
DC Generators A shunt generator gives its greatest voltage at Half full load None of the listed here Full load No load Half full load None of the listed here Full load No load ANSWER DOWNLOAD EXAMIANS APP
DC Generators If the flux per pole of dc generator is halved but its speed is doubled, its generated emf will Be halved Remain the same Be quadrupled Be doubled Be halved Remain the same Be quadrupled Be doubled ANSWER DOWNLOAD EXAMIANS APP
DC Generators The armature of dc machine is laminated in order to reduce Copper loss Eddy current loss Hysteresis loss Frictional loss Copper loss Eddy current loss Hysteresis loss Frictional loss ANSWER DOWNLOAD EXAMIANS APP
DC Generators The essential condition for parallel operation of two D.C. generators is that they have Same percentage regulation Same kW rating The same drooping voltage characteristics The same operation r.p.m. Same percentage regulation Same kW rating The same drooping voltage characteristics The same operation r.p.m. ANSWER DOWNLOAD EXAMIANS APP
DC Generators The armature of a dc machine having 10 poles is rotating at a speed of 10 revolution per second. The number of hysteresis loops formed per second is ______ 150 10 100 50 150 10 100 50 ANSWER DOWNLOAD EXAMIANS APP
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