Jigging is a technique by which different particles can be____________________?

Related Mcqs:

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

   A. Specific gravities
   B. Wettability
   C. Shape
   D. None of these

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. 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

5. Agglomeration of individual particles into clusters (flocs) is called flocculation. To prevent flocculation, the most commonly used dispersing agents are________________?

   A. Carbonates
   B. Sulphates
   C. Silicates & phosphates
   D. Bi-carbonates

6. Separation of particles of various sizes, shapes and densities by allowing them to settle in a fluid is called__________________?

   A. Classification
   B. Froth floatation
   C. Thickening
   D. Clarification

7. Solid particles of different densities are separated by _____________________?

   A. Filters
   B. Thickness
   C. Cyclones
   D. Sorting classifier

8. Two particles are called to be equal settling, if they are having the same ?

   A. Size
   B. Specific gravity
   C. Terminal velocities in the same fluid & in the same field of force
   D. None of these

9. A 30% (by volume) suspension of spherical sand particles in a viscous oil has a hindered settling velocity of 4.44 μm/s. If the Richardson Zaki hindered settling index is 4.5, then the terminal velocity of a sand grain is_________________?

   A. 0.90 μm/s
   B. 1 μm/s
   C. 22.1 μm/s
   D. 0.02 μm/s

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

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