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Mechanical Operations

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

Hydrocyclones
Thickeners
Decanters
Classifiers

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Mechanical Operations
Gizzlies are used for separating __________ solids.

Coarse
None of these
Any size
Fine

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Mechanical Operations
The porosity of a compressible cake is

Same throughout the thickness of cake
Minimum at the upstream face
Minimum at the filter medium
Maximum at the filter medium

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Mechanical Operations
Fibrous material is broken by a

Ball mill
Squirrel-cage disintegrator
Rollcrusher
Tube mill

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Mechanical Operations
Two particles are called to be equal settling, if they are having the same.

None of these
Terminal velocities in the same fluid & in the same field of force
Specific gravity
Size

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Mechanical Operations
According to Bond crushing law, the work required to form particle of size 'D' from very large feed is (where (S/V)p and (S/V)f are surface to volume ratio of the product and feed respectively).

(S/V)²p
(S/V)f
(S/V)p
√(S/V)p

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