For efficient grinding, ball mills must be operated Options: A . &nbspAt a speed less than the critical speed B . &nbspAt a speed more than the critical speed C . &nbspAt a speed equal to the critical speed D . &nbspWith minimum possible small balls

For efficient grinding, ball mills must be operated

Question

For efficient grinding, ball mills must be operated

Options:

A . At a speed less than the critical speed

B . At a speed more than the critical speed

C . At a speed equal to the critical speed

D . With minimum possible small balls

Answer: Option A

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