Flow of filtrate through the cake in a plate and frame filter press is best described by the ______________ equation?

Related Mcqs:

1. 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

2. 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.

3. In case of a plate and frame filter press, filtrate flow through the cake follows _______________ flow?

   A. Plug
   B. Turbulent
   C. Laminar
   D. None of these

4. 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

5. 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.

6. In washing type plate and frame filter press, the ratio of washing rate to the final filtrate rate is__________________?

   A. 4
   B. 1/4
   C. 1
   D. 1/2

7. Filtration rate through a filter cake is proportional to (where, S = filtering surface R = specific cake resistance μ = viscosity of the filtrate) ?

   A. S
   B. 1/R
   C. 1/μ
   D. All A., B. & C.

8. The cake resistance increases steadily with the time of filtration in a plate and frame filter employing constant ______________ filtration?

   A. Rate
   B. Pressure
   C. Both A. & B.
   D. Neither A. nor B.

9. Shell and leaf filter as compared to plate and frame filter _____________________?

   A. Entails less labor cost
   B. Facilitates filtration under higher pressure
   C. Provides more effective washing
   D. All A., B. & C.

10. A straight line is obtained on plotting reciprocal of filtration rate vs. the volume of filtrate for _______________ flow of filtrate?

    A. Compressible cakes and laminar
    B. Incompressible cake and laminar
    C. Compressible cake and turbulent
    D. Incompressible cake and turbulent