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Mechanical Operations

Mechanical Operations
Ore concentration by jigging is based on the difference in the __________ of the particles.

Shape
Wettability
None of these
Specific gravities

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Mechanical Operations
The value of work index does not change materially from one equipment to another. If the value of work index determined for close circuit grinding is Wi, then the same for open circuit grinding will be

Wi
0.5 Wi
3.34 Wi
1.34 Wi

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Mechanical Operations
__________ mills are termed as impactors.

None of these
Hammer
Cage
Rolling-compression

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Mechanical Operations
Shape factor for a cylinder whose length equals its diameter is

1.0
0.5
1.5
2.0

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Mechanical Operations
Which is a secondary crusher for a hard & tough stone?

Toothed roll crusher
Jaw crusher
Impact crusher
Cone crusher

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Mechanical Operations
The filtrate flow rate in constant pressure filtration

Continuously decreases
May increase or decrease ; depends on the pressure
Continuously increases
Remains constant throughout

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