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Mechanical Operations

Mechanical Operations
For benefication of iron ore, the most commonly used method is

Flocculation
Jigging & tabling
None of these
Froth floatation

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Mechanical Operations
Basic slag is not ground in

Compartment mills
Ball mills
Jaw crushers
Tube mills

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

None of these
Increases
Does not effect
Decreases

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Mechanical Operations
Temperature of the product during ultrafine grinding

Increases
Decreases
Remains constant
May increase or decrease ; depends on the material being ground

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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).

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

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

Gums
Hard rubber
Waxes
Resins

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