DC Generators The essential condition for parallel operation of two D.C. generators is that they have The same drooping voltage characteristics Same kW rating Same percentage regulation The same operation r.p.m. The same drooping voltage characteristics Same kW rating Same percentage regulation The same operation r.p.m. ANSWER DOWNLOAD EXAMIANS APP
DC Generators The real working part of a dc machine is the ______ None of the listed here Field winding Armature winding Commutator None of the listed here Field winding Armature winding Commutator ANSWER DOWNLOAD EXAMIANS APP
DC Generators The field winding of a dc shunt machine usually caries _______ of the rated current of the machine. 2% to 5% Less than 0.5 % 15 to 25% More than 20% 2% to 5% Less than 0.5 % 15 to 25% More than 20% ANSWER DOWNLOAD EXAMIANS APP
DC Generators The purpose of providing dummy coils in a generator is To provide mechanical balance for the rotor To enhance flux density To reduce eddy current losses To amplify voltage To provide mechanical balance for the rotor To enhance flux density To reduce eddy current losses To amplify voltage ANSWER DOWNLOAD EXAMIANS APP
DC Generators As a result of armature reaction, the reduction in the total mutual air gap flux in a D.C. generator is approximately 10 percent 25 percent 5 percent 40 percent 10 percent 25 percent 5 percent 40 percent 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 full voltage None of the listed here Fail to excite Excite to one half of full voltage Excite to full voltage None of the listed here Fail to excite Excite to one half of full voltage ANSWER DOWNLOAD EXAMIANS APP
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