DC Generators Which of the following will not prevent a self excited shunt generator from building upto its full voltage? No residual magnetism Speed too high Open field Wrong direction of rotation No residual magnetism Speed too high Open field Wrong direction of rotation ANSWER DOWNLOAD EXAMIANS APP
DC Generators When two D.C. series generators are running in parallel, an equalizer bar is used So that two similar machines will pass approximately equal currents to the load To reduce the combined effect of armature reaction of both machines To increase the series flux To increase the speed and hence generated e.m.f. So that two similar machines will pass approximately equal currents to the load To reduce the combined effect of armature reaction of both machines To increase the series flux To increase the speed and hence generated e.m.f. ANSWER DOWNLOAD EXAMIANS APP
DC Generators A 4-pole dc machine has _____ magnetic circuits. 2 8 6 4 2 8 6 4 ANSWER DOWNLOAD EXAMIANS APP
DC Generators In D.C. generators the polarity of the interpoles Is neutral as these poles do not play part in generating e.m.f. Is opposite to that of the main pole ahead Is the same as that of the immediately preceding pole Is the same as that of the main pole ahead Is neutral as these poles do not play part in generating e.m.f. Is opposite to that of the main pole ahead Is the same as that of the immediately preceding pole Is the same as that of the main pole ahead 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 The armature of dc generator is laminated to Reduce the bulk Reduce eddy current loss Provide the bulk Insulate the core Reduce the bulk Reduce eddy current loss Provide the bulk Insulate the core ANSWER DOWNLOAD EXAMIANS APP
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