Discussion
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- Question
__________ mills fall in the category of tumbling mills,
Options- A. Ball and pebble
- B. Rod and tube
- C. Compartment
- D. all (a), (b) & (c)
- Correct Answer
- all (a), (b) & (c)
- 1. Separation of materials into products based on the difference of their sizes is called
Options- A. sizing
- B. sorting
- C. classification
- D. flocculation Discuss
- 2. Mass flow of granular solid (M) through a circular opening of dia, D follows
Options- A. M ? D
- B. M ? D2
- C. M ? D3
- D. M ? D Discuss
- 3. To get ultrafine particles, the equipment used is a
Options- A. ball mill
- B. rod mill
- C. hammer crusher
- D. fluid energy mill Discuss
- 4. In a mixer, the quantity, (v. L/D) is termed as __________ number(where, v = longitudinal velocity of material, L = length of the mixer, D = diffusivity in axial mixing).
Options- A. Weber
- B. Peclet
- C. Brinkman
- D. Schmidt Discuss
- 5. Cumulative analysis for determining surface is more precise than differential analysis, because of the
Options- A. assumption that all particles in a single fraction are equal in size.
- B. fact that screening is more effective.
- C. assumption that all particles in a single fraction are equal in size, is not needed.
- D. none of these. Discuss
- 6. The maximum slope of a belt conveyor can be
Options- A. 15°
- B. 30°
- C. 45°
- D. 60° Discuss
- 7. To remove very small amount of tiny solid impurities from liquid, we use a
Options- A. pressure filter
- B. vacuum filter
- C. centrifugal filter
- D. coagulant Discuss
- 8. Energy requirement (per unit mass of material crushed/ground) is highest for
Options- A. jaw crusher
- B. rod mill
- C. ball mill
- D. fluid energy mill Discuss
- 9. Colloidal mills are used for __________ grinding.
Options- A. coarse
- B. intermediate
- C. fine
- D. ultrafine Discuss
- 10. Screw conveyors are
Options- A. run at very high rpm.
- B. suitable for sticky materials.
- C. suitable for highly abrasive materials.
- D. all (a), (b) and (c) Discuss
Mechanical Operations problems
Search Results
Correct Answer: sizing
Correct Answer: M ? D3
Correct Answer: fluid energy mill
Correct Answer: Peclet
Correct Answer: assumption that all particles in a single fraction are equal in size, is not needed.
Correct Answer: 30°
Correct Answer: coagulant
Correct Answer: fluid energy mill
Correct Answer: ultrafine
Correct Answer: suitable for sticky materials.
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