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Mechanical Operations

Mechanical Operations
In froth floatation, chemical agent added to cause air adherence is called

Collector
Frother
Modifier
Activator

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Mechanical Operations
Which of the following is used for primary crushing of very hard lumpy materials?

Toothed roll crusher
Tube mill
Ball mill
Gyratory crusher

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Mechanical Operations
The capacity of a gyratory crusher is __________ that of a jaw crusher with the same gape, handling the same feed & for the same product size range.

10 times
2.5 times
5 times
Same as

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Mechanical Operations
__________ is the most commonly used 'filter aid'.

Vermiculite
Semi-plastic clay
Fuller's earth
Diatomaceous earth

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Mechanical Operations
The unit of filter medium resistance is

Cm⁻¹
Cm/gm⁻¹
Gm/cm⁻¹
Gm⁻¹

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Mechanical Operations
Rittinger number which designates the new surface prduced per unit of mechanical energy absorbed by the material being crushed, depends on the

Elastic constant of the material
Ultimate strength of the material
All of these
State or manner of application of the crushing force

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