DC Generators Brushes of D.C. machines are made of Carbon Soft copper All of above Hard copper Carbon Soft copper All of above Hard copper ANSWER DOWNLOAD EXAMIANS APP
DC Generators The greatest percentage of heat loss in a dc machine is due to ______ Hysteresis loss Frictional loss Copper loss Eddy current loss Hysteresis loss Frictional loss Copper loss Eddy current loss ANSWER DOWNLOAD EXAMIANS APP
DC Generators To avoid formation of grooves in the commutator of a D.C. machine All of these Brush position has no effect on the commutator grooving The brushes of opposite polarity should track each other The brushes of same polarity should track each other All of these Brush position has no effect on the commutator grooving 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 copper loss is constant for Both shunt and compound generator Shunt generator only None of the listed here Series generator only Both shunt and compound generator Shunt generator only None of the listed here Series generator only ANSWER DOWNLOAD EXAMIANS APP
DC Generators The no load voltage of a generator is 240 V and rated load voltage is 220 V. The voltage regulation of the generator is 9.1% 4.5% 2.8% 11.3% 9.1% 4.5% 2.8% 11.3% ANSWER DOWNLOAD EXAMIANS APP
DC Generators Open circuited armature coil of a D.C. machine is 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 Both of the listed here Indicated by a spark completely around the commutator None of these ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS