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MECHANICAL OPERATIONS

Mechanical Operations
Size measurement of ultrafine particles can be best expressed in terms of

Centimetre
Micron
Screen size
Surface area per unit mass

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Mechanical Operations
Rittinger number which designates the new surface prduced per unit of mechanical energy absorbed by the material being crushed, depends on the

Elastic constant of the material
State or manner of application of the crushing force
All of these
Ultimate strength of the material

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Mechanical Operations
In case of a plate and frame filter press, filtrate flow through the cake follows __________ flow.

Laminar
None of these
Turbulent
Plug

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Mechanical Operations
Screen capacity is not a function of

Its openings size
Screening mechanism
Atmospheric humidity
Screening surface

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Mechanical Operations
In case of a hammer crusher, the

Minimum product size is 3 mm
Rotor shaft carrying hammers can be vertical or horizontal
Maximum feed size may be 50 mm
Feed may be highly abrasive (Moh's scale >5)

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