Mechanical Operations
Cake resistance is

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

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Mechanical Operations
Pick out the wrong statement pertaining to the roll crushers.

For hard material's crushing, the reduction ratio should not exceed 4
Maximum feed size determines the required roll diameter
Reduction ratio and differential roll speed affect production rate & energy consumed per unit of surface produced
Both the rolls run necessarily at the same speed

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