Mechanical Operations
Which of the following grinding mills has the horizontally arranged rods as the grinding elements thereby delivering more uniform granular products with minimum fines?

Compartment mill
Tube mill
Rod mill
Pebble mill

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Mechanical Operations
Bond crushing law

Is less realistic in estimating the power requirements of commercial crushers
Calls for relatively less energy for the smaller product particles, than does the Rittinger law
States that the work required for the crushing is proportional to the new surface created
States that the work required to form particle of any size from very large feed is proportional to the square root of the volume to surface ratio of the product

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Mechanical Operations
Cumulative analysis for determining surface is more precise than differential analysis, because of the

Assumption that all particles in a single fraction are equal in size
None of these
Fact that screening is more effective
Assumption that all particles in a single fraction are equal in size, is not needed

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