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Mechanical Operations

Mechanical Operations
Stamp mills are generally used for crushing

Diamond
Gold ores
Talc
Iron ores

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Mechanical Operations
Froth floatation is the most suitable for treating

Sulphide ores
None of these
Iron ores
Quartzite

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Mechanical Operations
The reduction ratio for grinders is defined as(where, Df and Dp are average diameters of feed and product respectively).

None of these
Df/Dp
Dp/Df
Df - Dp

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Mechanical Operations
increasing the capacity of a screen __________ the screen effectiveness.

Decreases
Does not effect
Increases
None of these

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Mechanical Operations
Washability curve based on float and sink test enables an assessment to be made of the possibility of cleaning a coal fraction based on the

Volatile matter content
Density separation
Differential wettability
Size

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Mechanical Operations
With increase in drum speed, in a rotary drum filter, the filtration rate

Is not affected
Decreases
Increases
Increases linearly

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