Filter medium resistance is that offered by the__________________?

Related Mcqs:

1. 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

2. Filter aids like asbestos, kieselguhr, diatomaceous earth etc. are used to increase the porosity of the final filter cake & reducing the cake resistance during filtration. Filter aid is_______________?

   A. Added to the feed slurry
   B. Pre-coated on the filter medium prior to filtration
   C. Separated from the cake by dissolving solids or by burning it off
   D. All A, B. & C.

3. The resistance offered by the filter used in a bag filter is proportional to (where, c = dust concentration, and s = particle size)?

   A. c/s
   B. s/c
   C. s . c
   D. 1/s . c

4. 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

5. The unit of filter medium resistance is________________?

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

6. Filter medium resistance is important during the ______________ of filtration?

   A. Early stages
   B. Final stages
   C. Entire process
   D. None of these

7. The controlling resistance in a rotary drum vacuum filter is the ________________ resistance?

   A. Piping
   B. Cake
   C. Filter medium
   D. None of these

8. Which of the following is not used as a filter medium in case of corrosive liquids?

   A. Nylon
   B. Glass cloth
   C. Metal cloth of monel or stainless steel
   D. Cotton fabric

9. Introduction of slurry in a plate and frame filter press is done through a plate in each frame. The plate of this filter has a _______________ surface?

   A. Plane
   B. Curved
   C. Ribbed
   D. Either A. or B.

10. Tank filter (e.g., Nutsche filter) is___________________?

    A. A high pressure filter
    B. A continuous filter
    C. Used for small scale filtration work
    D. A leaf filter