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Mechanical Operations

Mechanical Operations
Which of the following may prove unsuitable for filtering volatile liquids?

Pressure filter
Centrifugal filter
Vacuum filter
Gravity filter

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Mechanical Operations
Filter aid is used to

Increase the porosity of the cake
Decrease the pressure drop
Act as a support base for the septum
Increase the rate of filtration

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Mechanical Operations
Screen capacity is not a function of

Its openings size
Screening mechanism
Screening surface
Atmospheric humidity

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Mechanical Operations
Which of the following size reduction equipments employs mainly attrition for ultrafine grinding?

Micronizer
Fluid energy mill
Jet mills
All of these

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Mechanical Operations
Ball mills and tube mills with flint or porcelain balls are used for size reduction of

Rubber
Asbestos
Non-metallic ores
Limestone

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Mechanical Operations
Bucket elevators are not suitable for the vertical lifting of __________ materials.

Sticky (e.g. clay paste)
Free flowing
Fine (e.g. - 200 mesh size coal)
Small lumpy (e.g. grains and sand)

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