In D.C. machines the usual limit of slot pitch is________________?
Correct answer: D. between 25 to 35 mm
- A. between 5 to 10 mm
- B. between 10 to 15 mm
- C. between 15 to 20 mm
- D. between 25 to 35 mm
Explanation
The usual D.C. armature slot pitch is kept around 25 to 35 mm. A very small pitch makes slots and teeth difficult to construct, while an excessively large pitch worsens the distribution of conductors and commutation.
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