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Mechanical Operations

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

Decanters
Classifiers
Thickeners
Hydrocyclones

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Mechanical Operations
If radius of a batch basket centrifuge is halved & the r.p.m. is doubled, then the

Capacity of centrifuge is increased
Linear speed of the basket is halved
Linear speed of the basket is doubled
Centrifugal force is doubled

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Mechanical Operations
__________ mills are termed as impactors.

Cage
Hammer
None of these
Rolling-compression

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Mechanical Operations
The main size reduction operation in ultrafine grinders is

Impact
Compression
Attrition
Cutting

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Mechanical Operations
For the transportation of ultrafine particles, the equipment used is a........conveyor.

Screw
None of these
Pneumatic
Belt

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Mechanical Operations
Pebble mills are tumbling mills widely used for grinding in the manufacture of paints & pigments and cosmetic industries, where iron contamination in the product is highly objectionable. Pebbles used in pebble mill are made of

Concrete
Stainless steel
Flint or porcelain
Bronze

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