DC Motors Excessive sparking at brushes may be caused due to Dirt on the commutator Misaligment of machine Loose coupling Worn bearings Dirt on the commutator Misaligment of machine Loose coupling Worn bearings ANSWER DOWNLOAD EXAMIANS APP
DC Motors The speed of a dc motor can be controlled by changing Armature circuit resistance Is flux All of the listed here Aplied voltage Armature circuit resistance Is flux All of the listed here Aplied voltage ANSWER DOWNLOAD EXAMIANS APP
DC Motors The dirction of rotation of a dc series motor can be changed by Interchanging field terminals Interchanging supply terminals Either of Interchanging field or Interchanging supply None of the listed here Interchanging field terminals Interchanging supply terminals Either of Interchanging field or Interchanging supply None of the listed here ANSWER DOWNLOAD EXAMIANS APP
DC Motors A compensating winding is an auxiliary winding embedded in slots in None of the listed here Partly in pole faces, partly in armature The armature The pole faces of main poles None of the listed here Partly in pole faces, partly in armature The armature The pole faces of main poles ANSWER DOWNLOAD EXAMIANS APP
DC Motors One D.C. motor drives another D.C. motor. The second D.C. motor when excited and driven Also runs as a motor comes to stop after sometime Does not run as a generator None of these Runs as a generator Also runs as a motor comes to stop after sometime Does not run as a generator None of these Runs as a generator ANSWER DOWNLOAD EXAMIANS APP
DC Motors By flux control method of speed control of a dc shunt motor, we can obtain speeds. Above as well as below the normal speed Below the normal speed only Above the normal speed only None of the listed here Above as well as below the normal speed Below the normal speed only Above the normal speed only None of the listed here ANSWER DOWNLOAD EXAMIANS APP
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