For efficient grinding, ball mills must be operated__________________?
Correct answer: A. At a speed less than the critical speed
- 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
Explanation
Above the critical speed, centrifugal force holds the balls against the mill wall and prevents effective impact and cascading. Efficient grinding therefore requires operation below the critical speed.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
Practise Chemical Process Principles
2,710 free Chemical Process Principles 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 Chemical Process Principles questions
_____________ is the most suitable for compounding rubber and plastic solids ?
During filtration operation, the filtrate encounters the resistance of the ___________________?
Rittinger number which designates the new surface produced per unit of mechanical energy absorbed by the material being crushed, depends on the ______________________?
Rittinger's number designates the new surface created per unit mechanical energy absorbed by the material being crushed. Larger value of Rittinger's number of a material indicates its________________?
Carbon black is pulverised in a_______________?
Which of the following is the most suitable filter for separation of abrasive solids suspended in a corrosive liquid ?