The operating speed of a ball mill should be ______________ the critical speed?
Correct answer: A. Less than
- A. Less than
- B. Much more than
- C. At least equal to
- D. Slightly more than
Explanation
A ball mill is operated below its critical speed so that the balls are lifted and then fall or cascade through the material. At the critical speed, centrifugal force holds the balls against the shell and grinding becomes ineffective.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
Practise Fluid Flow Operations
909 free Fluid Flow Operations MCQs from Chemical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemical Engineering questions like this
Chemical Engineering is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
More Fluid Flow Operations questions
Xanthates are used in the froth floatation process as a/an _______________________?
Filtration should be stopped in a filter press, if the_________________?
The reduction ratio for fine grinders is_____________?
Filtration rate does not depend upon the________________?
Shape factor for a cylinder whose length equals its diameter is_________________?
Which of the following is a batch sedimentation equipment ?