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