Which of the following statements associated with the installation and preventive maintenance of dc machines is correct ?
A. The commutator should be regularly lubricated in order to reduce brush friction.
B. Accumulation of dust on the machine may cause electrical failure of the machine.
C. Periodic greasing increases the life of the bearings and also provides trouble free service.
D. None of the above.
Answer:C
Which of the following statements associated with the installation and preventive maintenance of dc machines is correct ?
A. The commutator should be regularly lubricated in order to reduce brush friction. B. Accumulation of dust on the machine may cause electrical failure of the machine. C. Periodic greasing increases the life of the bearings and also provides trouble free service. D. None of the above.