Mechanical Operations
In constant pressure filtration,

Rate of filtration is constant
Rate of filtration increases with time
Rate of filtration decreases with time
Resistance decreases with time

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

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

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