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  • Question

  • Pine oil and cresylic acid are used as __________ in the froth floatation process.


  • Options
  • A. frother
  • B. collector
  • C. depressor
  • D. conditioner

  • Correct Answer
  • frother 

    • Mechanical Operations problems

    Search Results

    • 1. Which of the following is not an industrial screening equipment?

    • Options
    • A. Sharpies centrifuge
    • B. Vibrating screen
    • C. Grizzly
    • D. Trommel
      • Discuss
    • 2. Sedimentation on commercial scale occurs in

    • Options
    • A. classifiers
    • B. thickeners
    • C. rotary drum filters
    • D. cyclones
      • Discuss
    • 3. Supporting legs of a plate and frame filter is normally made of

    • Options
    • A. stainless steel
    • B. cast iron
    • C. high speed steel
    • D. wooden plank
      • Discuss
    • 4. Screen efficiency is

    • Options
    • A. recovery/rejection
    • B. recovery
    • C. rejection
    • D. none of these
      • Discuss
    • 5. For grinding of cereals, grains, spices, pigments, saw dust, cork etc., the most extensively used size reduction equipment is a

    • Options
    • A. Buhrstone mill
    • B. ball mill
    • C. crushing rolls
    • D. hammer mill
      • Discuss
    • 6. Which of the following is not used as a filter medium in case of corrosive liquids?

    • Options
    • A. Nylon
    • B. Glass cloth
    • C. Metal cloth of monel or stainless steel
    • D. Cotton fabric
      • Discuss
    • 7. Apron conveyors are used for

    • Options
    • A. heavy loads & short runs.
    • B. small loads & long runs.
    • C. heavy loads & long runs.
    • D. none of these.
      • Discuss
    • 8. The specific surface of spherical particles is given by (where D and ? are diameter and density of particle).

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 9. Pick out the correct statement.

    • Options
    • A. Plastic chips are called non-cohesive solids.
    • B. Kick's crushing law is, P/m = K . ln
    • C. Communition is a generic term for size enlargement operation.
    • D. Energy required in kwh per ton of product, such that 80% of it passes through a 200 mesh screen, is called 'Work index'.
      • Discuss
    • 10. With increase in drum speed, in a rotary drum filter, the filtration rate

    • Options
    • A. increases
    • B. increases linearly
    • C. decreases
    • D. is not affected
      • Discuss

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