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Mechanical Operations

Mechanical Operations
For spheres, the surface shape factor is given by (where, A = area, V = volume, and D = diameter)

None of these
AD/V
π(=A/D²)
π/6(=V/D³)

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Mechanical Operations
There is practically no alternative/competitor to __________ in the beneficiation treatment of sulphide ores.

Classification
Froth floatation
Tabling
Jigging

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

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

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Mechanical Operations
As particle size is reduced

Screening becomes progressively easier
None of these
Capacity and effectiveness of the screen is increased
Screening becomes progressively more difficult

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

Froth floatation
None of these
Jigging & tabling
Flocculation

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Mechanical Operations
The sphericity of a solid particle of cubical shape is

π
π/3
(π/6)1/2
(π/6)1/3

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