Discussion
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- Question
Colloidal mills are used for __________ grinding.
Options- A. coarse
- B. intermediate
- C. fine
- D. ultrafine
- Correct Answer
- ultrafine
- 1. 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
- 2. 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
- 3. The maximum slope of a belt conveyor can be
Options- A. 15°
- B. 30°
- C. 45°
- D. 60° Discuss
- 4. __________ mills fall in the category of tumbling mills,
Options- A. Ball and pebble
- B. Rod and tube
- C. Compartment
- D. all (a), (b) & (c) Discuss
- 5. Separation of materials into products based on the difference of their sizes is called
Options- A. sizing
- B. sorting
- C. classification
- D. flocculation Discuss
- 6. 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
- 7. In case of grinding in a ball mill
Options- A. wet grinding achieves a finer product size than dry grinding.
- B. its capacity decreases with increasing fineness of the products.
- C. grinding cost and power requirement increases with increasing fineness of the products.
- D. all (a), (b) and (c). Discuss
- 8. Hot, lumpy & abrasive materials are best transported by using a/an __________ conveyor.
Options- A. apron
- B. belt
- C. screw
- D. flight Discuss
- 9. Cartridge filters are termed as 'edge' filters, because of the fact that the
Options- A. disks have very sharp edge.
- B. solids are not deposited at the edge of the disk.
- C. bulk of the solids are removed at the periphery of the disks.
- D. none of these. Discuss
- 10. Fick's law relates to
Options- A. energy consumption
- B. final particle size
- C. feed size
- D. none of these Discuss
Mechanical Operations problems
Search Results
Correct Answer: fluid energy mill
Correct Answer: coagulant
Correct Answer: 30°
Correct Answer: all (a), (b) & (c)
Correct Answer: sizing
Correct Answer: suitable for sticky materials.
Correct Answer: all (a), (b) and (c).
Correct Answer: apron
Correct Answer: bulk of the solids are removed at the periphery of the disks.
Correct Answer: energy consumption
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