Electrical Machines Satisfactory commutation of DC machine requires All of these smooth, concentric commutator properly undercut. brushes should smoothly run in the holders. brushes should be of proper grade and size. All of these smooth, concentric commutator properly undercut. brushes should smoothly run in the holders. brushes should be of proper grade and size. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To achieve spark less commutation brushes of DC generator are rocked ahead so as to bring them just behind the magnetic neutral axis. None of these in magnetic neutral axis. just ahead of magnetic neutral axis. just behind the magnetic neutral axis. None of these in magnetic neutral axis. just ahead of magnetic neutral axis. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Number of tappings for each equalizer ring is equal to number of poles. number of pole pairs. number of parallel paths. number of commutator segments. number of poles. number of pole pairs. number of parallel paths. number of commutator segments. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC generator sparking between brushes and commutator surface may be due to over commutation. any of the above. under commutation. too rapid reversal of current. over commutation. any of the above. under commutation. too rapid reversal of current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The change in speed of a DC generator due to increased load is corrected by increasing input power of the prime mover. increasing armature resistance. increasing terminal voltage. increasing armature cooling. increasing input power of the prime mover. increasing armature resistance. increasing terminal voltage. increasing armature cooling. ANSWER DOWNLOAD EXAMIANS APP
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