DC Generators Brushes of D.C. machines are made of Hard copper Carbon Soft copper All of above Hard copper Carbon Soft copper All of above ANSWER DOWNLOAD EXAMIANS APP
DC Generators Wave wound generators provide More current and more voltage More current but less voltage Less current but more voltage None of the listed here More current and more voltage More current but less voltage Less current but more voltage None of the listed here ANSWER DOWNLOAD EXAMIANS APP
DC Generators The main factor which leads to unstable parallel operation of flat and over compounded generators is their rising voltage characteristics unequal number of turns in their series field windings unequal series field resistances unequal speed regulation of their primemovers their rising voltage characteristics unequal number of turns in their series field windings unequal series field resistances unequal speed regulation of their primemovers 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 The nature of armature winding of a dc machine is decided by Back pitch Front pitch Commutator pitch None of the listed here Back pitch Front pitch Commutator pitch None of the listed here ANSWER DOWNLOAD EXAMIANS APP
DC Generators If a self excited D.C. generator after being installed, fails to build up on its first trial run, the first thing to do is to check armature insulation resistance increase the speed of primemover increase the field resistance reverse the field connections check armature insulation resistance increase the speed of primemover increase the field resistance reverse the field connections ANSWER DOWNLOAD EXAMIANS APP
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