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Mechanical Operations

Mechanical Operations
__________ mills are termed as impactors.

None of these
Cage
Hammer
Rolling-compression

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Mechanical Operations
Pine oil and cresylic acid are used as __________ in the froth floatation process.

Collector
Frother
Conditioner
Depressor

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Mechanical Operations
The porosity of a compressible cake is

Minimum at the filter medium
Maximum at the filter medium
Same throughout the thickness of cake
Minimum at the upstream face

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Mechanical Operations
Basic slag is not ground in

Compartment mills
Jaw crushers
Tube mills
Ball mills

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Mechanical Operations
For Indian standard (IS) screens, the mesh number is equal to its aperture size expressed to the nearest deca-micron (0.01 mm). Aperture width of IS screen of mesh number 50 will be approximately __________ microns.

5000
500
5
50

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Mechanical Operations
Which of the following is not used as a surface active agent in a flocculation operation?

Alumina
Lime
Quartz
Sodium silicate

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