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Mechanical Operations

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

Frother
Collector
Activator
Modifier

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Mechanical Operations
__________ baffles are provided in ball mills.

Horizontal
None of these
No
Only two

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Mechanical Operations
The work index in Bond's law for crushing of solids has the following dimensions

KW/ton
KWh.m1/2/ton
KWh/ton
No units (dimensionless)

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Mechanical Operations
Sphericity of pulverised coal is

∞
>1
1

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Mechanical Operations
Ultracentrifuges running at speeds upto 100000 rpm is normally used for the

Separation of cream from milk
Separation of isotopes based on their density or molecular weights difference
Dewaxing of lubricating oil
Concentration of rubber latex

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Mechanical Operations
The controlling resistance in a rotary drum vacuum filter is the __________ resistance.

Filter medium
Cake
Piping
None of these

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