In a D.C. machine, the value of peripheral speed should not, normally, exceed___________?
Correct answer: C. 30 m/s
- A. 10 m/s
- B. 20 m/s
- C. 30 m/s
- D. 40 m/s
Explanation
The peripheral speed of a conventional DC machine is normally limited to about 30 m/s to control centrifugal stress, vibration, and mechanical losses. Higher speeds require special mechanical construction.
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