As the brushes ride on the commutator of a DC generator, eventually mica ridges will form between the bars causing sparking and chipping of the brushes. When this happens the mica must be undercut. To what depth is the mica undercut?
A
The mica slots are undercut to a depth 1mm below the surface of the commutator bars.
B
The mica slots are undercut to a depth approximately twice the width of the slot.
C
The mica slots are undercut to a depth approximately equal to the width of the slot.
D
The mica slots are undercut. but the actual depth is unimportant.
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Question 1 / 205eccefa3bacbc34ba4d480a5
Question 1 of 205eccefa3bacbc34ba4d480a5
As the brushes ride on the commutator of a DC generator, eventually mica ridges will form between the bars causing sparking and chipping of the brushes. When this happens the mica must be undercut. To what depth is the mica undercut?
As the brushes ride on the commutator of a DC generator, eventually mica ridges will form between the bars causing sparking and chipping of the brushes. When this happens the mica must be undercut. To what depth is the mica undercut?