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Mechanical Operations

Mechanical Operations
Stamp mills are generally used for crushing

Diamond
Gold ores
Iron ores
Talc

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Mechanical Operations
__________ mill is not used for grinding wheat into flour and for milling of cereals & other vegetable products.

Buhrstone
Pebble
Roller
Attrition

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Mechanical Operations
Horsepower required for a roll crusher is directly proportional to its

Neither A nor B
Reduction ratio
Both A & B
Capacity

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Mechanical Operations
Which of the following crushers can be considered as a combination of a jaw crusher and a roller crusher?

Rod mill
Fluid energy mill
Ball mill
Gyratory crusher

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Mechanical Operations
The specific cake resistance for incompressible sludges is (where ΔP = pressure drop over cake)

∝ ΔP
∝ √ΔP
∝ 1/ ΔP
Independent of ΔP

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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.

Tailing
Concentrate
None of these
Middling

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