DC Generators The armature winding of a dc machine is place on the rotor to ______ Reduce losses Reduce armature reaction Save iron Facilitate commutation Reduce losses Reduce armature reaction Save iron Facilitate commutation ANSWER DOWNLOAD EXAMIANS APP
DC Generators In a D.C. generator the ripples in the direct e.m.f. generated are reduced by Using equalizer rings Using carbon brushes of superior quality Using conductor of annealed copper Using commutator with large number of segments Using equalizer rings Using carbon brushes of superior quality Using conductor of annealed copper Using commutator with large number of segments ANSWER DOWNLOAD EXAMIANS APP
DC Generators Due to armature reaction, the main pole flux of a dc generator is Distorted only Weakend only Weakened as well as distorted None of the listed here Distorted only Weakend only Weakened as well as distorted None of the listed here ANSWER DOWNLOAD EXAMIANS APP
DC Generators In a practical dc generator, mechanical efficiency is Less than electrical efficiency Equal to electrical efficiency None of the listed here More than electrical efficiency Less than electrical efficiency Equal to electrical efficiency None of the listed here More than electrical efficiency ANSWER DOWNLOAD EXAMIANS APP
DC Generators The open circuit voltage of a compound generator is 250 V. At full load the terminal voltage None of these May be greater or less than 250 V Will always be 250 V Will be less than 250 V None of these May be greater or less than 250 V Will always be 250 V Will be less than 250 V ANSWER DOWNLOAD EXAMIANS APP
DC Generators If the value of shunt field resistance of a shunt generator is greater than the critical resistance, the generator will Excite to one half of full voltage None of the listed here Excite to full voltage Fail to excite Excite to one half of full voltage None of the listed here Excite to full voltage Fail to excite ANSWER DOWNLOAD EXAMIANS APP