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chemical engineering mechanical operations
1. Actual operating speed of a ball mill may vary from 65 to 80% of the critical speed. Which of the following duties would require the ball mill to be operated at maximum percentage of critical speed ?
(A): Dry grinding of large particles (upto 1.25 cms).
(B): Dry grindng of large particles in un-baffed mills.
(C): Wet grinding in high viscous suspension.
(D): Wet grinding in low viscous suspension.
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