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Mechanical Operations

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

Frother
Activator
Collector
Modifier

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Mechanical Operations
Size reduction of __________ is accomplished in steam heated rollers and roll crushers.

Hard rubber
Gums
Resins
Waxes

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Mechanical Operations
Jigging is a technique by which different particles can be

Mixed
Separated by particle density
Separated by particle size
Separated by particle shape

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Mechanical Operations
The filtrate flow rate in constant pressure filtration

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

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Mechanical Operations
__________ conveyor is the most suitable for long distance transportation of cold, non-abrasive granular/irregular shape/fine materials.

Bucket
Apron
Screw
Belt

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Mechanical Operations
Activators are those chemicals which help buoying up one mineral in preference to the other in the froth floatation process. Which of the following is an activator?

Calcium carbonate
Copper sulphate
Sodium carbonate
Cresylic acid

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