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 . δ² . ρL

½w² . δρL (2R + δ)

½w² . R . ρL(R + 2δ)

½w² . R² . ρL

½w² . δ² . ρL

½w² . δρL (2R + δ)

½w² . R . ρL(R + 2δ)

½w² . R² . ρL

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Mechanical Operations
Sphericity of a cubical particle, when its equivalent diameter is taken as the height of the cube, is

√3

0.5

1

√2

√3

0.5

1

√2

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Mechanical Operations
Ore concentration by jigging is based on the difference in the __________ of the particles.

Shape

None of these

Specific gravities

Wettability

Shape

None of these

Specific gravities

Wettability

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Mechanical Operations
Shell and leaf filter as compared to plate and frame filter

All of these

Facilitates filtration under higher pressure

Provides more effective washing

Entails less labor cost

All of these

Facilitates filtration under higher pressure

Provides more effective washing

Entails less labor cost

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Mechanical Operations
The capacity of a gyratory crusher is __________ that of a jaw crusher with the same gape, handling the same feed & for the same product size range.

5 times

10 times

2.5 times

Same as

5 times

10 times

2.5 times

Same as

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Mechanical Operations
Crushing efficiency is the ratio of the

Energy absorbed by the solid to the surface energy created by crushing

Energy absorbed by the solid to that fed to the machine

Energy fed to the machine to the surface energy created by crushing

Surface energy created by crushing to the energy absorbed by the solid

Energy absorbed by the solid to the surface energy created by crushing

Energy absorbed by the solid to that fed to the machine

Energy fed to the machine to the surface energy created by crushing

Surface energy created by crushing to the energy absorbed by the solid

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Mechanical Operations

Mechanical Operations Sphericity of a cubical particle, when its equivalent diameter is taken as the height of the cube, is

Mechanical Operations Ore concentration by jigging is based on the difference in the __________ of the particles.

Mechanical Operations Shell and leaf filter as compared to plate and frame filter

Mechanical Operations The capacity of a gyratory crusher is __________ that of a jaw crusher with the same gape, handling the same feed & for the same product size range.

Mechanical Operations Crushing efficiency is the ratio of the

Mechanical Operations
Sphericity of a cubical particle, when its equivalent diameter is taken as the height of the cube, is

Mechanical Operations
Ore concentration by jigging is based on the difference in the __________ of the particles.

Mechanical Operations
Shell and leaf filter as compared to plate and frame filter

Mechanical Operations
The capacity of a gyratory crusher is __________ that of a jaw crusher with the same gape, handling the same feed & for the same product size range.

Mechanical Operations
Crushing efficiency is the ratio of the