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MECHANICAL OPERATIONS

Mechanical Operations
Percentage of drum submerged in the slurry in case of rotary drum filter is

25
3
30
85

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Mechanical Operations
In froth floatation, chemical agent added to cause air adherence is called

Modifier
Activator
Collector
Frother

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Mechanical Operations
In constant pressure filtration,

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

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Mechanical Operations
Size reduction of the __________ can be suitably done by ball mills, crushing rolls and rod mills.

Basic slags
Asbestos & mica
Metalliferrous ores
Non-metallic ores

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Mechanical Operations
In a mixer, the quantity, (v. L/D) is termed as __________ number(where, v = longitudinal velocity of material, L = length of the mixer, D = diffusivity in axial mixing).

Peclet
Brinkman
Weber
Schmidt

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