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  • Question

  • 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)

  • Correct Answer
  • Rotary disc filter 

    • Mechanical Operations problems

    Search Results

    • 1. 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
    • 2. 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
    • 3. __________ are used for the separation of coarse particles from a slurry of fine particles.

    • Options
    • A. Thickeners
    • B. Classifiers
    • C. Hydrocyclones
    • D. Decanters
      • Discuss
    • 4. 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
    • 5. 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
    • 6. Moore filter is a __________ filter.

    • Options
    • A. leaf
    • B. press
    • C. rotary
    • D. sand
      • Discuss
    • 7. 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
    • 8. The operating speed of a ball mill should be __________ the critical speed.

    • Options
    • A. less than
    • B. much more than
    • C. at least equal to
    • D. slightly more than
      • Discuss
    • 9. Vacuum is applied in __________ zone, in case of a general type continuous rotary drum vacuum filter.

    • Options
    • A. filtering
    • B. washing
    • C. drying
    • D. all (a), (b) & (c)
      • Discuss
    • 10. The resistance offered by the filter used in a bag filter is proportional to (where, c = dust concentration, and s = particle size )

    • Options
    • A. c/s
    • B. s/c
    • C. s . c
    • D. 1/s . c
      • Discuss

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