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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. [Wrong Answer] |
B. | Accumulation of dust on the machine may cause electrical failure of the machine. [Wrong Answer] |
C. | Perïodic greasing increases the life of the bearings and also provides trouble free service. [Correct Answer] |
D. | None of the above [Wrong Answer] |