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Mechanical Operations

Mechanical Operations
__________ baffles are provided in ball mills.

None of these
Horizontal
No
Only two

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Mechanical Operations
Choke crushing (in case of a Jaw crusher) compared to free crushing

Consumes less power
Consumes more power
Results in increased capacity
Both A and C

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Mechanical Operations
Temperature of the product during ultrafine grinding

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

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

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

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Mechanical Operations
For the preliminary breaking of hard rock, we use a

Tube mill
Ball mill
Squirrel-cage disintegrator
Gyratory crusher

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Mechanical Operations
Run of mine (ROM) coal is crushed by a __________ for use in domestic ovens.

Jaw crusher
Hammer crusher
Ball mill
Tube mill

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