DC Generators The armature of dc machine is laminated in order to reduce Hysteresis loss Frictional loss Eddy current loss Copper loss Hysteresis loss Frictional loss Eddy current loss Copper loss ANSWER DOWNLOAD EXAMIANS APP
DC Generators To avoid formation of grooves in the commutator of a D.C. machine The brushes of same polarity should track each other The brushes of opposite polarity should track each other All of these Brush position has no effect on the commutator grooving The brushes of same polarity should track each other The brushes of opposite polarity should track each other All of these Brush position has no effect on the commutator grooving 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 Excite to one half of full voltage None of the listed here Fail to excite Excite to full voltage Excite to one half of full voltage None of the listed here Fail to excite 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 40 percent 25 percent 5 percent 10 percent 40 percent 25 percent 5 percent 10 percent ANSWER DOWNLOAD EXAMIANS APP
DC Generators The armature core of a D.C. generator is usually made of Cast-iron Copper Nonferrous material Silicon steel Cast-iron Copper Nonferrous material Silicon steel ANSWER DOWNLOAD EXAMIANS APP
DC Generators In D.C. generators, current to the external circuit from armature is given through None of above Solid connection Commutator Slip rings None of above Solid connection Commutator Slip rings ANSWER DOWNLOAD EXAMIANS APP
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