Question

How much can be the working revolution per minute (RPM) of the ball mill

• A. 23-28 "D where D means the diameter of jar
• B. Two times more than the critical revolution per minute
• C. 42.3 "D (D=diameter of the jar)
• D. The average of critical RPM and the optional RPM

Answer 1

The Correct Option is A

The correct option is (A) : 23-28 "D where D means the diameter of jar