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Mechanical Operations

Mechanical Operations
The distribution given by microscopic analysis of powder is

Volume
Length
Number
Area

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Mechanical Operations
The mechanism of size reduction by a hammer mill is by impact and attrition between the

Grinding element & the housing
Both A & B
Feed particles
Neither A nor B

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Mechanical Operations
Cake resistance is

None of these
Independent of pressure drop
Important in the beginning of filtration
Decreased with the time of filtration

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Mechanical Operations
The filtrate flow rate in constant pressure filtration

Continuously decreases
Continuously increases
May increase or decrease ; depends on the pressure
Remains constant throughout

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Mechanical Operations
Sizing of very fine particles of the order of 5 to 10 microns is done by elutriation, which is a __________ operation.

Flocculation
Clarification
Classification
Sedimentation

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Mechanical Operations
__________ mill is not a revolving mill.

Compartment
Pebble
Tube
Cage

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