DC Generators To avoid formation of grooves in the commutator of a D.C. machine The brushes of opposite polarity should track each other All of these The brushes of same polarity should track each other Brush position has no effect on the commutator grooving The brushes of opposite polarity should track each other All of these The brushes of same polarity should track each other 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 Fail to excite None of the listed here Excite to full voltage Excite to one half of full voltage Fail to excite None of the listed here Excite to full voltage Excite to one half of full voltage ANSWER DOWNLOAD EXAMIANS APP
DC Generators Wave wound generators provide More current but less voltage Less current but more voltage More current and more voltage None of the listed here More current but less voltage Less current but more voltage More current and more voltage None of the listed here ANSWER DOWNLOAD EXAMIANS APP
DC Generators The greatest percentage of heat loss in a dc machine is due to ______ Eddy current loss Copper loss Hysteresis loss Frictional loss Eddy current loss Copper loss Hysteresis loss Frictional loss ANSWER DOWNLOAD EXAMIANS APP
DC Generators In a four-pole D.C. machine Two north poles follow two south poles All the four poles are south poles Alternate poles are north and south All the four poles are north poles Two north poles follow two south poles All the four poles are south poles Alternate poles are north and south All the four poles are north poles ANSWER DOWNLOAD EXAMIANS APP
DC Generators The brush voltage drop in dc machine is about _______ 0.1 V 2 V 10 V 20 V 0.1 V 2 V 10 V 20 V ANSWER DOWNLOAD EXAMIANS APP
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