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Mechanical Operations

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

Flocculation
None of these
Froth floatation
Jigging & tabling

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Mechanical Operations
Length/diameter ratio of a ball mill is

< 1
> 1
1.5
1

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Mechanical Operations
Size reduction of the __________ can be suitably done by ball mills, crushing rolls and rod mills.

Asbestos & mica
Non-metallic ores
Basic slags
Metalliferrous ores

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Mechanical Operations
In coal washeries, three products namely the valuable product (i.e. clean/washed coal), discarded product (i.e. mineral matter) and an additional concentrated product called __________ is produced.

Middling
Concentrate
Tailing
None of these

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Mechanical Operations
Highly viscous liquids & pastes are agitated by

Multiple blade paddles
None of these
Propellers
Turbine agitators

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Mechanical Operations
Choke crushing (in case of a Jaw crusher) compared to free crushing

Consumes more power
Results in increased capacity
Both A and C
Consumes less power

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