The critical speed of a trommel (N) is related to its dia D. as _____________________?
Correct answer: A. N ∝ 1/√D
- A. N ∝ 1/√D
- B. N ∝ √D
- C. N ∝ D
- D. N ∝ 1/D
Explanation
At critical speed, the balance between centrifugal and gravitational effects gives N proportional to the inverse square root of diameter. Hence a larger trommel must rotate more slowly to remain at its critical condition.
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