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Mechanical Operations

Mechanical Operations
Filtration rate through a filter cake is proportional to (where, S = filtering surface R = specific cake resistance μ = viscosity of the filtrate)

1/μ
All of these
S
1/R

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Mechanical Operations
Wet grinding in a revolving mill __________ as compared to dry grinding.

Complicates handling of the product
Gives less wear on chamber walls
Increases capacity
Requires more energy

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Mechanical Operations
In a roll crusher, the specific power consumption and the production rate is affected by the

Both A & B
Neither A nor B
Differential roll speed
Reduction ratio

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Mechanical Operations
In a roll crusher, both the rolls

Have the same diameter
Are rotated towards each other
All of these
Run either at the same or different speeds

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Mechanical Operations
Ball mill is used for

Fine grinding
Coarse grinding
Crushing
Attrition

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Mechanical Operations
With increase in drum speed, in a rotary drum filter, the filtration rate

Decreases
Is not affected
Increases linearly
Increases

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