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Mechanical Operations

Mechanical Operations
Reciprocal of sphericity is termed as the

Surface area per unit mass
Shape factor
Specific surface ratio
Sauter diameter

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Mechanical Operations
The most suitable filter for the removal of very small amount of precipitate from very large volumes of water is the __________ filter.

Rotary
Plate & frame
Sand
Vacuum

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Mechanical Operations
To get ultrafine particles, the equipment used is a

Fluid energy mill
Hammer crusher
Ball mill
Rod mill

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Mechanical Operations
Size reduction of fibrous materials like wood, asbestos, mica etc. is done by a disintegrator exemplified by the

Cage mill
Bradford's breaker
Blake jaw crusher
Stamp mill

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Mechanical Operations
Percentage of drum submerged in the slurry in case of rotary drum filter is

30
85
25
3

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Mechanical Operations
In continuous filtration (at a constant pressure drop), filtrate flow rate varies inversely as the

Square root of the velocity
Washing time only
Square of the viscosity
Filtration time only

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