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Mechanical Operations

Mechanical Operations
Dry powdery solid materials are transported by a __________ conveyor.

Bucket
None of these
Screw
Belt

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Mechanical Operations
Use of grinding aids results in the

Neither A nor B
Finer products
Both A & B
Enhanced production rate

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Mechanical Operations
Separation of solid particles based on their densities is called

Dispersion
Clarification
Sizing
Sorting

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Mechanical Operations
Pick out the material having minimum Rittinger's number.

Quartz
Calcite
Galena
Pyrite

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Mechanical Operations
In a size reduction crushing operation, feed size is 100 to 300 mm. while the product size is 10 to 50 mm. This is a case of the __________ crushing.

Secondary
Primary
Fine
Ultrafine

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Mechanical Operations
What is the critical rotation speed in revolutions per second, for a ball mill of 1.2 m diameter charged with 70 mm dia balls?

2.76
0.5
0.66
1

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