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Mechanical Operations

Mechanical Operations
Which one is a filter aid?

None of these
Convas fabric
Diatomaceous earth
Calcined lime

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Mechanical Operations
Ball mill is used for

Coarse grinding
Attrition
Fine grinding
Crushing

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Mechanical Operations
Which of the following clay mixing devices is vacuum operated for deairation of clay?

None of these
Banbery mixer
Pug mill
Muller-mixer

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Mechanical Operations
Trommels employ __________ for screening of materials.

Punched plate
Woven wire screen
Fibrous cloth
None of these

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Mechanical Operations
For a turbine agitated and baffled tank, operating at low Reynold's number (based on impeller diameter), the power number (Np) varies with NRe as

Np → constant
Np ∝ NRe
Np ∝ 1/NRe
Np ∝ √NRe

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Mechanical Operations
In paint industries, blending of light paste is done by using a

Masticator
Kneader
Charge can mixer
None of these

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