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  • Question

  • For benefication of iron ore, the most commonly used method is


  • Options
  • A. flocculation.
  • B. froth floatation.
  • C. jigging & tabling.
  • D. none of these.

  • Correct Answer
  • jigging & tabling. 

    • Mechanical Operations problems

    Search Results

    • 1. The most suitable equipment for the transportation of 200 mesh size particles is a

    • Options
    • A. bucket elevator
    • B. pneumatic conveyor
    • C. screw conveyor
    • D. belt conveyor
      • Discuss
    • 2. For the transportation of ultrafine particles, the equipment used is a........conveyor.

    • Options
    • A. belt
    • B. pneumatic
    • C. screw
    • D. none of these
      • Discuss
    • 3. Screen capacity is proportional to (where, S = screen aperture)

    • Options
    • A. S
    • B. 1/S
    • C. S2
    • D. S
      • Discuss
    • 4. __________ is a cohesive solid.

    • Options
    • A. Wheat
    • B. Sand
    • C. Wet clay
    • D. none of these
      • Discuss
    • 5. Dispersion of a gas through liquid is done by using a

    • Options
    • A. sparger
    • B. kneader
    • C. masticator
    • D. none of these
      • Discuss
    • 6. In a grinding operation, the limiting particle size is the size of the __________ particle in the sample.

    • Options
    • A. smallest
    • B. largest
    • C. either (a) or (b)
    • D. neither (a) nor (b)
      • Discuss
    • 7. Chance process is used for the

    • Options
    • A. cleaning of coal.
    • B. concentration of iron ore.
    • C. concentration of pyrites.
    • D. water treatment
      • Discuss
    • 8. Sphericity for a non-spherical particle is given by (where, V and S are volume and surface area respectively of one particle. and, D = equivalent diameter of particle).

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 9. Size reduction of ice and gypsum can be accomplished suitably by a __________ crusher.

    • Options
    • A. Blake jaw
    • B. toothed roll
    • C. gyratory
    • D. none of these.
      • Discuss
    • 10. Reciprocal of sphericity is termed as the

    • Options
    • A. specific surface ratio
    • B. shape factor
    • C. sauter diameter
    • D. surface area per unit mass
      • Discuss

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