The porosity of a compressible cake is(A) Minimum at the filter medium(B) Minimum at the upstream face(C) Maximum at the filter medium(D) Same throughout the thickness of cake

The porosity of a compressible cake is
(A) Minimum at the filter medium
(B) Minimum at the upstream face
(C) Maximum at the filter medium
(D) Same throughout the thickness of cake
by

1 Answer

Answer :

(A) Minimum at the filter medium
by

Related questions

A compressible cake has the (A) Maximum porosity at the upstream side (B) Maximum porosity at the filter medium (C) Same porosity throughout the cake thickness (D) None of these

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Last Answer : (A) Maximum porosity at the upstream side

During filtration operation, the filtrate encounters the resistance of the (A) Filter medium (B) Cake (C) Channel carrying the slurry to the upstream side of the cake and filtrate away from the filter medium (D) All (A), (B) and (C)

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Last Answer : (D) All (A), (B) and (C)

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'

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Last Answer : (D) All 'a', 'b' & 'c'

. In filtration, the use of 'filter aid' helps in (A) Reducing the filtration pressure (B) Accelerating the rate of filtration (C) Deplugging the filter medium (D) Enhancing the cake porosity in case of a dense impermeable cake

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The specific cake resistance for compressible sludges is a function of the pressure drop (A) Over cake (B) Over medium (C) Overall (D) None of these

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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

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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

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A filter press is (A) A batch filter (B) Not suitable, if the liquid is the main product (C) Having prohibitively high maintenance cost (D) Not suitable for wide range of materials under varying operating conditions of cake thickness and pressure

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Compressibility co-efficient for an absolutely compressible cake is (A) 0 (B) 1 (C) 0 to 1 (D) ∞

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With increase in the pressure drop across the cake, the specific cake resistance for the compressible sludge (A) Increases (B) Decreases (C) Remains constant (D) Increases linearly

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