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Mechanical Operations

Mechanical Operations
The specific surface of spherical particles is given by (where D and ρ are diameter and density of particle).

12/D.p
4/D.p
6/D.p
2/D.p

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Mechanical Operations
Wheat is ground into flour in a

Impact mill
Roller crusher
Hammer crusher
Fluid energy mill

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

Jaw crusher
Ball mill
Tube mill
Hammer crusher

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Mechanical Operations
Ball mills and tube mills with flint or porcelain balls are used for size reduction of

Non-metallic ores
Rubber
Asbestos
Limestone

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Mechanical Operations
__________ is a cohesive solid.

None of these
Wet clay
Sand
Wheat

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Mechanical Operations
Crushing of mineral particles is accomplished in a 'cage mill', when one or more alloy steel bars are revolved in opposite directions. It is a type of __________ mill.

Roll
Impact
None of these
Vibratory

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