A. Plug
B. Turbulent
C. Laminar
D. None of these
Related Mcqs:
- 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 - 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. - 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 - Flow of filtrate through the cake in a plate and frame filter press is best described by the ______________ equation?
A. Kozeny-Carman
B. Hagen-Poiseuille’s
C. Fanning’s
D. Kremser - 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. - 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 - 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. - 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. - 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 - 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.
