Related Questions

Addition of filter aid to the slurry before filtration is done to ...... of the cake.
A Increase the porosity
B Increase the compressibility co-efficient
C Decrease the porosity
D Decrease the compressibility co-efficient
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
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
Toggle Filter আইকনটি-i. Remove filter হিসেবে কাজ করেii. Undo filter হিসেবে কাজ করে iii. Apply filter হিসেবে কাজ করেনিচের কোনটি সঠিক?
A i ও ii
B i ও iii
C ii ও iii
D i, ii ও iii
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)
Filter aid is used to
A Increase the rate of filtration
B Decrease the pressure drop
C Increase the porosity of the cake
D Act as a support base for the septum
Which of the following is not used as filter aid?
A Asbestos
B Diatomaceous earth
C Purified wood cellulose
D Rice husk
__________ is the most commonly used 'filter aid'.
A Diatomaceous earth
B Fuller's earth
C Vermiculite
D Semi-plastic clay
The most common filter aid is
A Diatomaceous earth
B Calcium silicate
C Sodium carbonate
D Silica gel

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