Satisfactory commutation of D.C. machines requires
A. Brushes should be of proper grade and size
B. Brushes should smoothly run in the holders
C. Smooth, concentric commutator properly undercut
D. All of the above
Answer: Option D
This Question Belongs to Electrical Engineering >> D.C. Generators
Related Questions on D.C. Generators
A cumulatively compounded long shunt generator when operating as a motor would be
A. Cumulatively compounded long shunt
B. Differentially compounded long shunt
C. Cumulatively compounded short shunt
D. Differentially compounded short shunt
A. Demagnetization only
B. Cross magnetization as well as magnetization
C. Cross-magnetization as well as demagnetizing
D. Cross magnetization only
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