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Mechanical Operations

Mechanical Operations
__________ baffles are provided in ball mills.

Only two
No
Horizontal
None of these

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Mechanical Operations
For a sphere falling in the constant drag co-efficient regime, its terminal velocity depends on its diameter (d) as

√d
1/d
D²
D

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Mechanical Operations
Gold ore concentration is mostly done using

Elutriation
Jigging
Froth floatation
Tabling

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Mechanical Operations
Sauter mean diameter is the same as the __________ mean diameter.

Volume-surface
Geometric
Mass
Arithmetic

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Mechanical Operations
The process opposite to 'dispersion' is termed as the

Filtration
Flocculation
Sedimentation
None of these

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Mechanical Operations
During size reduction by a jaw crusher, the energy consumed decreases with the

Decreasing machine capacity
Increasing size of feed at constant reduction ratio
Decreasing size of product at constant size of feed
None of these

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