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Mechanical Operations

Mechanical Operations
__________ are used for the separation of coarse particles from a slurry of fine particles.

Decanters
Thickeners
Hydrocyclones
Classifiers

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Mechanical Operations
For crushing of solids, the Rittinger's law states that the work required for crushing is proportional to

The new surface created
The size reduction ratio
The change in volume due to crushing
None of these

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Mechanical Operations
Additives used for promoting the floccula-tion of particles is a/an

Both A & B
Electrolyte
Surface active agent
Neither A nor B

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Mechanical Operations
Two particles are called to be equal settling, if they are having the same.

Terminal velocities in the same fluid & in the same field of force
Specific gravity
Size
None of these

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Mechanical Operations
In a size reduction crushing operation, the feed size is 10 to 50 mm, while the product size is 2 to 10 mm. This is a case of __________ crushing.

Fine
Primary
Ultrafine
Secondary

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Mechanical Operations
The capacity of a pneumatic conveying system depends upon the

Bulk density of materials
All of these
Pressure of the conveying air
Diameter of the conveying line

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