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Mechanical Operations

Mechanical Operations
The main size reduction operation in ultrafine grinders is

Cutting
Compression
Attrition
Impact

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Mechanical Operations
Ultracentrifuges running at speeds upto 100000 rpm is normally used for the

Dewaxing of lubricating oil
Separation of cream from milk
Separation of isotopes based on their density or molecular weights difference
Concentration of rubber latex

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Mechanical Operations
Diatomaceous earth is a/an

Filter aid
Catalyst
Explosive
Filter medium

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Mechanical Operations
Laminar flow region is said to exist during agitation of a liquid in an agitator, when the value of Reynolds number is

>100
>10

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

Ratio of volume to surface as the particle
None of these
Ratio of surface to volume as the actual volume
Volume as the particle

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Mechanical Operations
In case of a hammer crusher, the final product size depends on the

Rotor speed
Feed rate
Clearance between hammer & grinding plates
All of these

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