Mechanical Operations
Paddle agitator

Moves at very high speed
None of these
Is suitable for mixing low viscosity liquids
Produces axial flow

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

Maximum feed size determines the required roll diameter
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

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