Ore concentration by jigging is based on the difference in the ______________ of the particles?

Related Mcqs:

1. Jigging is a technique by which different particles can be____________________?

   A. Separated by particle size
   B. Separated by particle density
   C. Separated by particle shape
   D. Mixed

2. Number of particles in a crushed solid sample is given by (where, m = mass of particles in a sample, Vp = volume of one particle, ρ= density of particles) ?

   A. m/ρ . Vp
   B. m . ρ/Vp
   C. m . Vp/ρ
   D. Vp/m . ρ

3. ______________ are used for the separation of coarse particles from a slurry of fine particles?

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

4. Solid particles separation based on the difference in their flow velocities through fluids is termed as the__________________?

   A. Clarification
   B. Classification
   C. Elutriation
   D. Sedimentation

5. Gold ore concentration is mostly done using___________________?

   A. Jigging
   B. Tabling
   C. Froth floatation
   D. Elutriation

6. The energy required per unit mass to grind limestone particles of very large size to 100 μm is 12.7 kWh/ton. An estimate (using Bond’s law) of the energy to grind the particles from a very large size to 50 μm is________________?

   A. 6.35 kWh/ton
   B. 9.0 kWh/ton
   C. 18 kWh/ton
   D. 25.4 kWh/ton

7. Separation of a suspension or slurry into a supernatant clear liquid (free from particles) and a thick sludge containing a high concentration of solid is called__________________?

   A. Classification
   B. Sedimentation
   C. Clarification
   D. Decantation

8. Separation of solid particles based on their densities is called_________________?

   A. Sizing
   B. Sorting
   C. Clarification
   D. Dispersion

9. Work index is the gross energy (kWh/tonne of feed) necessary to reduce a very large feed to such a size that 80% of product particles will pass through a 0.1 mm screen. The value of work index determined for wet grinding should be multiplied with ______________ to get the same for dry grinding?

   A. 1.0
   B. 0.5
   C. 1.34
   D. 4.34

10. Crushing of mineral particles is accomplished in a ‘cage mill’, when one or more alloy steel bars are revolved in opposite directions. It is a type of ______________ mill?

    A. Impact
    B. Roll
    C. Vibratory
    D. None of these