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Mechanical Operations

Mechanical Operations
Which of the following is not used as filter aid?

Diatomaceous earth
Purified wood cellulose
Asbestos
Rice husk

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

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

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Mechanical Operations
Mixing of plastic solids is generally facilitated by

None of these
Mastication
Kneading
Dispersion

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Mechanical Operations
Handling of ashes and similar materials can be done best by a __________ conveyor.

Flight
Belt
Drag or slat
Ribbon

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Mechanical Operations
Washability curve based on float and sink test enables an assessment to be made of the possibility of cleaning a coal fraction based on the

Volatile matter content
Size
Density separation
Differential wettability

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Mechanical Operations
The most common filter aid is

Silica gel
Diatomaceous earth
Sodium carbonate
Calcium silicate

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