Solid particles of different densities are separated by _____________________?

Related Mcqs:

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

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

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. 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

4. If a force greater than that of gravity is used to separate solids & fluids of different densities, the process is termed as the __________________?

   A. Sedimentation
   B. Flocculation
   C. Dispersion
   D. Centrifugation

5. Tabling process used for separating two materials of different densities by passing the dilute pulp over a table/deck, which is inclined from the horizontal surface at an angle of about________________?

   A. 1 to 2°
   B. 2 to 5°
   C. 5 to 10°
   D. 10 to 15°

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

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

7. 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

8. 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

9. Ultra centrifuges are used for the separation of _____________ solid particles?

   A. Coarse
   B. Fine
   C. Colloidal
   D. Dissolved

10. 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