Related Questions

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
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
During filtration operation, the filtrate encounters the resistance of the
A filter medium
B cake
C channel carrying the slurry to then upstream side of the cake and filtrate away from the filter medium
D all A, B and C
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
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
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
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 $$\frac{1}{2}$$w2.R2.ρL
B $$\frac{1}{2}$$w2.δ2.ρL
C $$\frac{1}{2}$$w2.δ.ρL(2R + δ)
D $$\frac{1}{2}$$w2.R.ρL(R + 2δ)
Applying a pressure drop across a capillary results in a volumetric flow rate 'Q' under laminar flow conditions. The flow rate for the same pressure drop, in a capillary of the same length but half the radius is
A $$\frac{{\text{Q}}}{2}$$
B $$\frac{{\text{Q}}}{4}$$
C $$\frac{{\text{Q}}}{8}$$
D $$\frac{{\text{Q}}}{{16}}$$

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