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Mechanical Operations

Mechanical Operations
200 mesh screen means 200 openings per

Inch²
Cm²
Cm
Inch

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Mechanical Operations
The optimum moisture content in solids to be crushed/ground ranges from __________ percent.

15 to 20
10 to 15
3 to 4
8 to 10

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Mechanical Operations
Weber number is significant and is concerned with the

Liquid-liquid mixing
Suspension of solid in liquid
Solid-liquid mixing
Dispersion of liquid in liquid

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

∞
0.5
1

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Mechanical Operations
The opening of a 200 mesh screen (Taylor series) is

0.0047 cm
0.0074 cm
0.0074 mm
74 mili-microns

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Mechanical Operations
Wheat is ground into flour in a

Fluid energy mill
Roller crusher
Hammer crusher
Impact mill

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