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  • Question

  • __________ are used for the separation of coarse particles from a slurry of fine particles.


  • Options
  • A. Thickeners
  • B. Classifiers
  • C. Hydrocyclones
  • D. Decanters

  • Correct Answer
  • Classifiers 

    • Mechanical Operations problems

    Search Results

    • 1. Laminar flow region is said to exist during agitation of a liquid in an agitator, when the value of Reynolds number is

    • Options
    • A. >10
    • B. <10
    • C. >100
    • D. <100
      • Discuss
    • 2. Which of the follwoing mechanical conveyors does not come under the division 'scrapers'?

    • Options
    • A. Ribbon conveyor
    • B. Flight conveyor
    • C. Bucket elevators
    • D. Drag conveyor.
      • Discuss
    • 3. For transporting pasty material, one will use a/an

    • Options
    • A. apron conveyor
    • B. belt conveyor
    • C. screw colaveyor
    • D. bucket elevator
      • Discuss
    • 4. Feed size of ? 25 cms can be accepted by

    • Options
    • A. ball mill
    • B. rod mill
    • C. fluid energy mill
    • D. jaw crusher
      • Discuss
    • 5. Capacity (in tons/hr) of jaw/gyratory crusher is equal to (where, L = length of the receiving opening, cm S = greater width of the discharge opening, cm)

    • Options
    • A. 0.01 L.S
    • B. 0.087 L.S
    • C. L.S
    • D. L.S/0.087
      • Discuss
    • 6. Bond crushing law

    • Options
    • A. calls for relatively less energy for the smaller product particles, than does the Rittinger law.
    • B. is less realistic in estimating the power requirements of commercial crushers.
    • C. states that the work required to form particle of any size from very large feed is proportional to the square root of the volume to surface ratio of the product.
    • D. states that the work required for the crushing is proportional to the new surface created.
      • Discuss
    • 7. General crushing equation is given by . Bond's crushing law isobtained by solving this equation for n = __________ and feed of infinite size.

    • Options
    • A. 1
    • B. 1.5
    • C. 2
    • D. 2.5
      • Discuss
    • 8. Which of the following is a vacuum filter?

    • Options
    • A. Filter press
    • B. Rotary disc filter
    • C. Batch basket centrifuge
    • D. Tank filter (Nutsch filter)
      • Discuss
    • 9. Moore filter is a __________ filter.

    • Options
    • A. leaf
    • B. press
    • C. rotary
    • D. sand
      • Discuss
    • 10. Shape factor for a cylinder whose length equals its diameter is

    • Options
    • A. 1.5
    • B. 0.5
    • C. 1.0
    • D. 2.0
      • Discuss

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