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 increase the field resistance increase the speed of primemover check armature insulation resistance reverse the field connections increase the field resistance increase the speed of primemover check armature insulation resistance reverse the field connections ANSWER DOWNLOAD EXAMIANS APP
DC Generators A separately excited generator as compared to a self-excited generator Has all above features Is more stable Has exciting current independent of load current Is amenable to better voltage control Has all above features Is more stable Has exciting current independent of load current Is amenable to better voltage control ANSWER DOWNLOAD EXAMIANS APP
DC Generators Brushes of D.C. machines are made of Hard copper All of above Soft copper Carbon Hard copper All of above Soft copper Carbon ANSWER DOWNLOAD EXAMIANS APP
DC Generators To avoid formation of grooves in the commutator of a D.C. machine 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 The brushes of same polarity should track each other The brushes of opposite polarity should track each other ANSWER DOWNLOAD EXAMIANS APP
DC Generators A 4-pole dc machine has _____ magnetic circuits. 8 6 2 4 8 6 2 4 ANSWER DOWNLOAD EXAMIANS APP
DC Generators Shunt generators are most suited for stable parallel operation because of their identical voltage characteristics linear voltage characteristics drooping voltage characteristics rising voltage characteristics identical voltage characteristics linear voltage characteristics drooping voltage characteristics rising voltage characteristics ANSWER DOWNLOAD EXAMIANS APP
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