DC Generators Carbon brushes are used in a dc machine because _______ Carbon lubricates and polishes the commutator Contact resistance is decreased None of the listed here Carbon is cheap Carbon lubricates and polishes the commutator Contact resistance is decreased None of the listed here Carbon is cheap ANSWER DOWNLOAD EXAMIANS APP
DC Generators In a cummulative compounded generator the shunt and series fields ______ each other. None of the listed here Aid Sometime aid, sometime oppose Oppose None of the listed here Aid Sometime aid, sometime oppose Oppose ANSWER DOWNLOAD EXAMIANS APP
DC Generators In a practical dc generator, mechanical efficiency is Equal to electrical efficiency None of the listed here Less than electrical efficiency More than electrical efficiency Equal to electrical efficiency None of the listed here Less than electrical efficiency More than electrical efficiency ANSWER DOWNLOAD EXAMIANS APP
DC Generators The armature reaction in a dc generator can be increased by increasing the Data is insufficient Armature current Field current None of the listed here Data is insufficient Armature current Field current None of the listed here ANSWER DOWNLOAD EXAMIANS APP
DC Generators The armature winding of a dc machine is ______ winding. An open circuit A closed circuit None of the listed here Partly open circuit and partly closed circuit An open circuit A closed circuit None of the listed here Partly open circuit and partly closed circuit ANSWER DOWNLOAD EXAMIANS APP
DC Generators The copper loss is constant for Both shunt and compound generator Series generator only None of the listed here Shunt generator only Both shunt and compound generator Series generator only None of the listed here Shunt generator only ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS