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
The filtrate flow rate in constant pressure filtration
A Continuously increases
B Continuously decreases
C Remains constant throughout
D May increase or decrease ; depends on the pressure
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 $$\frac{{\text{Q}}}{{16}}$$
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
Rate of filtrate delivery is inversely proportional to the
A Filtering area & the pressure difference driving force
B Viscosity of filtrate
C Cake & filter medium resistance
D Both A & B
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)
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
The fluid velocity varies as the square of the cylindrical pipe diameter, in case of steady state laminar flow at constant pressure drop, for __________ fluid.
A Newtonion
B Dilatant
C Pseudo-plastic
D Non-Newtonion
The fluid velocity varies as the square root of the cylindrical pipe diameter in case of steady state laminar flow at constant pressure drop fo __________ fluid.
A Dilatant
B Pseudo-plastic
C Bingham plastic
D Newtonion

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