A. Continuously increases
B. Continuously decreases
C. Remain constant throughout
D. May increase or decrease; depends on the pressure
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 - 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 - 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 - 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 - In continuous filtration (at a constant pressure drop), filtrate flow rate varies inversely as the__________________?
A. Square root of the velocity
B. Square of the viscosity
C. Filtration time only
D. Washing time only - Which of the following represents the plot of filtrate volume versus time for constant pressure filtration ?
A. Parabola
B. Straight line
C. Hyperbola
D. Exponential curve - 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 - 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 - 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 - For laminar flow of filtrate through the cake deposited on septum, which of the following will be valid ?
A. Kozeny-Carman equation
B. Leva’s equation
C. Blake-Plummer equation
D. None of these
