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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?

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? Correct Answer Dry grindng of large particles in un-baffed mills

Related Questions

At an Electronic Data processing unit, five out of the eight program sets P,Q,R,S,T,U,V and W are to be operated daily. On any one day, except for the first day of a month, only three of the program sets must be the ones that were operated on the previous day. The program operating must also satisfy the following conditions: 1. If program P is to be operated on a day, V can’t be operated on that day. 2. If Q is to be operated on a day, T must be one of the programs to be operated after Q. 3. If R is to be operated on a day, V must be one of the programs to be operated after R. 4. The last program to be operated on any day must be either S or U. If the program sets R and W are to be operated on the first day, which of the following could be the other program on that day?
The diameter of a ball mill is 3 m and the diameter of the balls in the ball mill is 50 cm. What is the critical speed of the ball mill?
Which of the following statements regarding the fundamental Duties contained in the Constitution of India are correct? Fundamental duties can be enforced through writ jurisdiction. Fundamental duties have formed a part of the constitution since its adoption. Fundamental duties became a part of the Constitution in accordance with the recommendations of the Swaran Singh Committee. Fundamental duties are applicable only to the citizens of India. Select the correct option-
Which the following are true about the fundamental duties for Indian citizens?
1. They require us to safe guard public property
2. They require us to protect and improve the natural environment
3. They are contained in Article 51A of the Constitution of India
4. They are added by 42nd Amendment of the Constitution of India
5. They require us to develop the scientific temper and spirit of inquiry
6. There were originally 11 fundamental duties
7. They can be enforced through writs as well as promoted through constitutional methods.
Consider the following question and statements and decide which of the statements is sufficient to answer the question. There are seven balls of different size and colors: green yellow, blue, orange, red, pink and black. What is the order of the balls from largest to smallest? Statements: 1. The red ball is larger than the green ball. 2. The pink ball is the smallest. 3. The blue ball is the largest. 4. The green ball is larger than the yellow ball. 5. The yellow ball is larger than the orange and black balls.
Consider the following question and statements and decide which of the statements is sufficient to answer the question. There are seven balls of different size and colors: green, yellow, blue, orange, red, pink and black. What is the order of the balls from largest to smallest? Statements: 1. The red ball is larger than the green ball. 2. The pink ball is the smallest. 3. The blue ball is the largest. 4. The green ball is larger than the yellow ball. 5. The yellow ball is larger than the orange and black balls. 
Given below are two quantities named I and II. Based on the given information, you have to determine the relation between the two quantities. You should use the given data and your knowledge of Mathematics to choose among the possible answers. A man has two balls. The ratio of radius of first ball to that of the second ball is 7 : 3. Quantity I: If man cut the first ball from middle and difference between total surface area of part of first ball and total surface area of second ball is 1538.46cm2, then find the radius of smaller ball. Quantity II: If the sum of radius of two balls is 30, then what is the radius of first ball?
Match List - I with List - II : List - I List - II A. Stamp duties and duties on medical I. Duties levied by the Union Government but collected and appropriated by the State B. Duties on succession to property other than agricultural land II. Taxes levied and collected by the Union but assigned to the States C. Taxes on income other than corporation tax and taxes on agricultural income III. Taxes levied and collected by the Union and distributed between the Union and the States D. Excise duty on items other than medical and toilet preparation IV. Taxes levied and collected by the Union but which may be distributed between the Union and the States Choose the correct answer from the options given below :
Which of the following statement/s about Fundamental Duties is/are not correct? (i) The Fundamental Duties are incorporated in Article 51A (Part IVA) of Constitution. (ii) The Fundamental Duties were inserted in the Constitution by the 42nd Constitution Amendment Act, 1976. (iii) The Fundamental Duties have to be fulfilled by every person living in India. (iv) The eleventh Fundamental Duty was added by the 86th Constitution Amendment Act, 2006. Choose the correct answer from the code given below :
Which of the following statement/s about Fundamental Duties is/are not correct?
1. The Fundamental Duties are incorporated in Article 51A (part IVA) of Consitution.
2. The Fundamental Duties are inserted in the Constitution by the 42nd Constitution Amendment Act, 1976.
3. The Fundamental Duties have to be fulfilled by every person living in India.
4. The eleventh Fundamental Duty was added by the 86th Constitution Amendment Act, 2006.
Choose the correct answer: