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Mechanical Operations

Mechanical Operations
Xanthates are used in the froth floatation process as a/an

Conditioner
Activator
Collector
Frother

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Mechanical Operations
__________ mill is not a revolving mill.

Cage
Compartment
Tube
Pebble

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Mechanical Operations
Size reduction of __________ is accomplished in steam heated rollers and roll crushers.

Gums
Waxes
Hard rubber
Resins

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Mechanical Operations
__________ balls capable of grinding the feed in a ball mill gives the maximum efficiency.

Cast iron
Maximum size
Minimum size
Elliptical

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Mechanical Operations
Rittinger's number designates the new surface created per unit mechanical energy absorbed by the material being crushed. Larger value of Rittinger's number of a material indicates its

None of these
Easier grindability
Poor grindability
High power consumption in grinding

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Mechanical Operations
If radius of a batch basket centrifuge is halved & the r.p.m. is doubled, then the

Linear speed of the basket is doubled
Centrifugal force is doubled
Linear speed of the basket is halved
Capacity of centrifuge is increased

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