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Mechanical Operations

Mechanical Operations
Size reduction of ice and gypsum can be accomplished suitably by a __________ crusher.

Blake jaw
Gyratory
Toothed roll
None of these

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Mechanical Operations
In closed circuit grinding as compared to open circuit grinding, the

Production rate at a given limiting size is lower
Specific surface of product is more
Operation is economical
Product has lesser size uniformity

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Mechanical Operations
Maximum size reduction in a fluid energy mill is achieved by

Impact
Interparticle attrition
Compression
Cutting

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Mechanical Operations
Froth floatation is the most suitable for treating

Iron ores
None of these
Quartzite
Sulphide ores

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Mechanical Operations
The term 'angle of nip' is concerned with the operation of the __________ crushers.

Gyratory
Roll
None of these
Jaw

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Mechanical Operations
Pine oil and cresylic acid are used as __________ in the froth floatation process.

Frother
Collector
Conditioner
Depressor

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