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Mechanical Operations

Mechanical Operations
Ore concentration by jigging is based on the difference in the __________ of the particles.

Specific gravities
None of these
Wettability
Shape

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Mechanical Operations
To remove dirt from the flowing fluid, we use a

Gravity settler
Clarifier
Strains
Coagulant

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Mechanical Operations
A gravity decanter is meant for the separation of two __________ density.

Immiscible liquids of different
Immiscible liquids of same
Miscible liquids of same
Miscible liquids of different

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Mechanical Operations
__________ is a cohesive solid.

None of these
Wheat
Wet clay
Sand

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Mechanical Operations
If dp is the equivalent diameter of a non-spherical particle, Vp its volume and sp its surface area, then its sphericity is Φs is defined by

Φs = 6 dp Sp/Vp
Φs = 6 Vp/dp sp
Φs = Vp/dp sp
Φs = dp Sp/Vp

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Mechanical Operations
General mechanism of size reduction in intermediate and fine grinder is by

Impact and attrition
Compression and tearing
Compression
Cutting action

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