Electrical Machines If the air gap of IM is increased, ____________ will increase. air gap flux. magnetizing current. power factor. speed. air gap flux. magnetizing current. power factor. speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Magnetic field of a DC generator is produced by what? Permanent magnets. None of the options. Electromagnets. Both B and C. Permanent magnets. None of the options. Electromagnets. Both B and C. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To achieve spark less commutation brushes of DC generator are rocked ahead so as to bring them 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 in magnetic neutral axis. just behind the magnetic neutral axis. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If in a sub – station there is one 132 / 33 kV transformer whose secondary is connected with primary of one 33 / 11 kV transformer, the total transformation ratio of the sub – station will be, 7. 12. 4. 3. 7. 12. 4. 3. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of following winding is connected in series with armature winding of DC machine? Compensating winding. Commutating pole winding. Both Compensating and Commutating pole winding. Auxiliary winding. Compensating winding. Commutating pole winding. Both Compensating and Commutating pole winding. Auxiliary winding. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a synchronous motor, damper windings are provided on pole faces. stator frame. rotor shaft. None of these pole faces. stator frame. rotor shaft. None of these ANSWER DOWNLOAD EXAMIANS APP
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