Fluid medium used in the classification technique of mineral beneficiation is_________________?

Related Mcqs:

1. There is practically no alternative/competitor to _________________ in the beneficiation treatment of sulphide ores?

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

2. Activators are those chemicals which help buoying up one mineral in preference to the other in the froth floatation process. Which of the following is an activator ?

   A. Cresylic acid
   B. Copper sulphate
   C. Calcium carbonate
   D. Sodium carbonate

3. In coal washeries, three products namely the valuable product (i.e. clean/washed coal), discarded product (i.e. mineral matter) and an additional concentrated product called _____________ is produced?

   A. Concentrate
   B. Tailing
   C. Middling
   D. None of these

4. Which of the following mineral dressing operations is termed as ‘comminution’?

   A. Panning
   B. Spiralling
   C. Tabling
   D. None of these

5. 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

6. Which of the following is not a non-metalliferous mineral ?

   A. Calcite
   B. Fluorspar
   C. Quartz
   D. Cassiterite

7. Filtrate flow rate in case of a rotary drum vacuum filter (in which Rm < < Rc) is proportional to ____________ and the cycle time (where, μ = filtrate viscosity Rm = filter medium resistance Rc = cake resistance)?

   A. √μ
   B. 1/√μ
   C. 1/μ
   D. 1/μ2

8. The unit of filter medium resistance is________________?

   A. cm-1
   B. gm/cm-1
   C. cm/gm-1
   D. gm-1

9. Filter medium resistance is that offered by the__________________?

   A. Filter cloth
   B. Embedded particles in the septum
   C. Filter cloth and the embedded particle collectively
   D. None of these

10. The basic filtration equation is given as dt/dV = (μ/A ΔP). [(α .CV/A) + Rm], where, V is volume of the filtrate; A is the filtration area, a is specific cake resistance, μ is viscosity of the filtrate, and C is the concentration of the solids in the feed slurry. In a 20 minutes constant rate filtration, 5 m3 of filtrate was obtained. If this is followed by a constant pressure filtration, how much more time in minutes, it will take for another 5 m3 of filtrate to be produced? Neglect filter medium resistance, Rm; assume incompressible cake ?

    A. 10
    B. 20
    C. 25
    D. 30