Mechanical Operations
The most suitable equipment used to devulcanise rubber scrap and to make water dispersion & rubber solution is a

None of these
Boundary mixer
Sharpies centrifuge
Propeller agitator

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Mechanical Operations
Rod mills employed for grinding

Is useful for handling sticky materials
All of these
Employ steel rods of 2-12 cms diameter extending over full length of the mill
Employ a steel shell having L/D ratio of 1.5 to 3.0

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