Discussion
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- Question
Mesh indicates the number of holes per
Options- A. square inch
- B. linear inch
- C. square foot
- D. linear foot
- Correct Answer
- linear inch
- 1. For removal of very small amounts of precipitate from large volume of water, the most suitable filter is the __________ filter.
Options- A. plate & frame
- B. shell & leaf
- C. sand
- D. rotary vacuum Discuss
- 2. Which of the following represents the plot of filtrate volume versus time for constant pressure filtration?
Options- A. Parabola
- B. Straight line
- C. Hyperbola
- D. Exponential curve Discuss
- 3. Which of the following gives the work required for size reduction of coal to -200 mesh in a ball mill most accurately?
Options- A. Rittinger's law
- B. Kick's law
- C. Bond's law
- D. none of these Discuss
- 4. Electrical energy consumed by a jaw crusher is not a function of the
Options- A. average feed size
- B. average product size
- C. machine capacity
- D. none of these Discuss
- 5. Sphericity is the ratio of the surface area of a spherical particle having the same volume as the particle to the surface area of the particle. Which of the following has the maximum value of sphericity?
Options- A. Sphere
- B. Cube
- C. Cylinder (L/D = 1)
- D. Raschig rings Discuss
- 6. Colloid mills achieve size reduction mainly by
Options- A. impact
- B. attrition
- C. cutting
- D. compression Discuss
- 7. A pebble mill
Options- A. is a ball mill.
- B. employs flints or ceramic pebbles as the grinding medium.
- C. is a tube mill lined with ceramic or other non-metallic liner.
- D. both (b) and (c). Discuss
- 8. Moisture can be removed from lubricating oil using
Options- A. tubular centrifuge
- B. clarifier
- C. sparkler filter
- D. vacuum leaf filter Discuss
- 9. The most common filter aid is
Options- A. diatomaceous earth
- B. calcium silicate
- C. sodium carbonate
- D. silica gel Discuss
- 10. Size reduction of asbestos and mica is done by
Options- A. hammer mills
- B. rod mills
- C. gyratory crushers
- D. crushing rolls Discuss
Mechanical Operations problems
Search Results
Correct Answer: sand
Correct Answer: Parabola
Correct Answer: Rittinger's law
Correct Answer: none of these
Correct Answer: Sphere
Correct Answer: attrition
Correct Answer: both (b) and (c).
Correct Answer: tubular centrifuge
Correct Answer: diatomaceous earth
Correct Answer: hammer mills
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