DC Generators The greatest percentage of heat loss in a dc machine is due to ______ Copper loss Hysteresis loss Frictional loss Eddy current loss Copper loss Hysteresis loss Frictional loss Eddy current loss ANSWER DOWNLOAD EXAMIANS APP
DC Generators When two D.C. generators are running in parallel an equalizer bar is used To reduce the combined effect of armature reaction of both the machines To increase the generated e.m.f. So that the two identical machines will pass approximately equal currents to the load To increase the series flux To reduce the combined effect of armature reaction of both the machines To increase the generated e.m.f. So that the two identical machines will pass approximately equal currents to the load To increase the series flux ANSWER DOWNLOAD EXAMIANS APP
DC Generators The dc generator that has poorest voltage is Series generator Over compounded generator Shunt generator Flat compounded generator Series generator Over compounded generator Shunt generator Flat compounded generator ANSWER DOWNLOAD EXAMIANS APP
DC Generators In a D.C. generator in order to reduce sparking at brushes, the self-induced e.m.f. in the coil is neutralized by all of the following except Dummy coils Interpoles Compensating winding Shifting of axis of brushes Dummy coils Interpoles Compensating winding Shifting of axis of brushes ANSWER DOWNLOAD EXAMIANS APP
DC Generators For the same rating, a dc machine has_______ an ac machines. The same weight as None of the listed here Less weight than More weight than The same weight as None of the listed here Less weight than More weight than ANSWER DOWNLOAD EXAMIANS APP
DC Generators Carbon brushes are used in a dc machine because _______ Carbon lubricates and polishes the commutator Contact resistance is decreased Carbon is cheap None of the listed here Carbon lubricates and polishes the commutator Contact resistance is decreased Carbon is cheap None of the listed here ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS