Filtration rate does not depend upon the________________?

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. Filtration operation carried out by continuous increase of the inlet pressure of slurry, is called the _____________ filtration?

   A. Constant rate
   B. Varying pressure
   C. Varying rate
   D. Constant pressure

3. A centrifugal filtration unit operating at a rotational speed of w has inner surface of the liquid (density ρL) located at a radial distance R from the axis of rotation. The thickness of the liquid film is δ and no cake is formed. The initial pressure drop during filtration is ___________________?

   A. ½w2 . R2 . ρL
   B. ½w2 . δ2 . ρL
   C. ½w2 . δρL (2R + δ)
   D. ½w2 . R . ρL(R + 2δ)

4. 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.

5. Angle of nip of the crushing rolls does not depend upon the_______________?

   A. Diameter of the rolls
   B. Speed of the rolls
   C. Product size
   D. Feed size

6. Grindability of a material does not depend upon its_____________________?

   A. Elasticity
   B. Hardness
   C. Toughness
   D. Size

7. During washing of filter at the end of constant pressure filtration, the rate of washing equals the rate of filtration___________________?

   A. At time zero
   B. At the end of filtration
   C. When half the filtrate has been obtained
   D. At the end of filtration, but decreases with time subsequently

8. Filtration capacity of a rotary drum vacuum filter depends upon the_______________?

   A. Cake thickness
   B. Characteristics of the feed slurry
   C. Both A. & B.
   D. Neither A. nor B.

9. The constants (Kb, Kr and Kk) used in the laws of crushing (i.e., Bond’s law, Rittinger’s law and Kick’s law) depend upon the_________________?

   A. Feed material
   B. Type of crushing machine
   C. Both A. & B.
   D. Neither A. nor B.

10. 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.