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 ?

Related Mcqs:

Which of the following is not used as filter aid ?

A. Asbestos B. Diatomaceous earth C. Purified wood cellulose D. Rice husk...

Which of the following size reduction equipments employs mainly attrition for ultrafine grinding ?

A. Jet mills B. Fluid energy mill C. Micronizer D. All A., B. and C....

As particle size is reduced__________________?

A. Screening becomes progressively more difficult B. Screening becomes progressively easier C. Capacity and effectiveness of the screen is increased D. None of these...

increasing the capacity of a screen _______________ the screen effectiveness?

A. Decreases B. Increases C. Does not effect D. None of these...

Vacuum filter is most suitable for the_______________?

A. Removal of fines from liquid B. Liquids having high vapour pressure C. Liquids of very high viscosity D. None of these...