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

Mechanical Operations
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

½w² . δρL (2R + δ)

½w² . R . ρL(R + 2δ)

½w² . δ² . ρL

½w² . R² . ρL

½w² . δρL (2R + δ)

½w² . R . ρL(R + 2δ)

½w² . δ² . ρL

½w² . R² . ρL

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Mechanical Operations
Paddle agitator

Is suitable for mixing low viscosity liquids

Produces axial flow

None of these

Moves at very high speed

Is suitable for mixing low viscosity liquids

Produces axial flow

None of these

Moves at very high speed

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Mechanical Operations
A. __________ mill is a revolving mill divided into two or more sections by perforated partitions in which preliminary grinding takes place at one end and the finishing grinding at the discharge end.

Compartment

Pebble

Tube

Rod

Compartment

Pebble

Tube

Rod

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Mechanical Operations
The most common filter aid is

Silica gel

Sodium carbonate

Diatomaceous earth

Calcium silicate

Silica gel

Sodium carbonate

Diatomaceous earth

Calcium silicate

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Mechanical Operations
Mass flow of granular solid (M) through a circular opening of dia, D follows

M ∝ D²

M ∝ D

M ∝ D³

M ∝ √D

M ∝ D²

M ∝ D

M ∝ D³

M ∝ √D

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Mechanical Operations
Equivalent diameter of a particle is the diameter of the sphere having the same

Ratio of surface to volume as the actual volume

Volume as the particle

None of these

Ratio of volume to surface as the particle

Ratio of surface to volume as the actual volume

Volume as the particle

None of these

Ratio of volume to surface as the particle

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Mechanical Operations

Mechanical Operations Paddle agitator

Mechanical Operations A. __________ mill is a revolving mill divided into two or more sections by perforated partitions in which preliminary grinding takes place at one end and the finishing grinding at the discharge end.

Mechanical Operations The most common filter aid is

Mechanical Operations Mass flow of granular solid (M) through a circular opening of dia, D follows

Mechanical Operations Equivalent diameter of a particle is the diameter of the sphere having the same

Mechanical Operations
Paddle agitator

Mechanical Operations
A. __________ mill is a revolving mill divided into two or more sections by perforated partitions in which preliminary grinding takes place at one end and the finishing grinding at the discharge end.

Mechanical Operations
The most common filter aid is

Mechanical Operations
Mass flow of granular solid (M) through a circular opening of dia, D follows

Mechanical Operations
Equivalent diameter of a particle is the diameter of the sphere having the same