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Mechanical Operations

Mechanical Operations
__________ mills fall in the category of tumbling mills,

All of these
Rod and tube
Ball and pebble
Compartment

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Mechanical Operations
For coarse reduction of hard solids, use

Impact
Compression
Attrition
Cutting

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Mechanical Operations
Size reduction mechanism used in Jaw crushers is

Impact
Cutting
Attrition
Compression

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Mechanical Operations
Trommels are revolving screens which normally operate in the range of __________ rpm.

43832
15 - 20
60 - 75
40 - 50

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Mechanical Operations
What is the selectivity index, if the grade of tailings & concentrate is the same?

1
∞
0.5

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Mechanical Operations
Helical screw agitator is used for

None of these
Blending immiscible liquids
Mixing liquids at very high temperature (> 250 °C)
Mixing highly viscous pastes

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