A sand mixture was screened through a standard 10-mesh screen. The mass fraction of the oversize material in feed, overflow and underflow were found to be 0.38, 0.79 and 0.22 respectively. The screen effectiveness based on the oversize is

Mechanical Operations
A sand mixture was screened through a standard 10-mesh screen. The mass fraction of the oversize material in feed, overflow and underflow were found to be 0.38, 0.79 and 0.22 respectively. The screen effectiveness based on the oversize is

0.62

0.68

0.58

0.5

0.62

0.68

0.58

0.5

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Mechanical Operations
Ultra centrifuges are used for the separation of __________ solid particles.

Dissolved

Coarse

Colloidal

Fine

Dissolved

Coarse

Colloidal

Fine

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Mechanical Operations
The energy required per unit mass to grind limestone particles of very large size to 100 μm is 12.7 kWh/ton. An estimate (using Bond's law) of the energy to grind the particles from a very large size to 50 μrn is

25.4 kWh/ton

18 kWh/ton

9.0 kWh/ton

6.35 kWh/ton

25.4 kWh/ton

18 kWh/ton

9.0 kWh/ton

6.35 kWh/ton

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Mechanical Operations
During agitation of liquids, the

All of these

Power number becomes independent of impellers Reynolds number at high Reynolds number, but is dependent on the geometry of the impeller

Froude number is independent for the curves between power number and Reynolds number in baffled system

Froude number is used to account for the effect of surface (e.g., the centre vortex) on the power number

All of these

Power number becomes independent of impellers Reynolds number at high Reynolds number, but is dependent on the geometry of the impeller

Froude number is independent for the curves between power number and Reynolds number in baffled system

Froude number is used to account for the effect of surface (e.g., the centre vortex) on the power number

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Mechanical Operations
Which of the following comes in the category of primary crusher for hard and tough stone?

Jaw crusher

Cone crusher

None of these

Gyratory crusher

Jaw crusher

Cone crusher

None of these

Gyratory crusher

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Mechanical Operations
In case of a revolving mill, wet grinding compared to dry grinding

Complicates handling & classification of the product

Requires more energy

Has less capacity

None of these

Complicates handling & classification of the product

Requires more energy

Has less capacity

None of these

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Mechanical Operations

Mechanical Operations A sand mixture was screened through a standard 10-mesh screen. The mass fraction of the oversize material in feed, overflow and underflow were found to be 0.38, 0.79 and 0.22 respectively. The screen effectiveness based on the oversize is

Mechanical Operations Ultra centrifuges are used for the separation of __________ solid particles.

Mechanical Operations The energy required per unit mass to grind limestone particles of very large size to 100 μm is 12.7 kWh/ton. An estimate (using Bond's law) of the energy to grind the particles from a very large size to 50 μrn is

Mechanical Operations During agitation of liquids, the

Mechanical Operations Which of the following comes in the category of primary crusher for hard and tough stone?

Mechanical Operations In case of a revolving mill, wet grinding compared to dry grinding

Mechanical Operations
A sand mixture was screened through a standard 10-mesh screen. The mass fraction of the oversize material in feed, overflow and underflow were found to be 0.38, 0.79 and 0.22 respectively. The screen effectiveness based on the oversize is

Mechanical Operations
Ultra centrifuges are used for the separation of __________ solid particles.

Mechanical Operations
The energy required per unit mass to grind limestone particles of very large size to 100 μm is 12.7 kWh/ton. An estimate (using Bond's law) of the energy to grind the particles from a very large size to 50 μrn is

Mechanical Operations
During agitation of liquids, the

Mechanical Operations
Which of the following comes in the category of primary crusher for hard and tough stone?

Mechanical Operations
In case of a revolving mill, wet grinding compared to dry grinding