Mechanical Operations
Bucket elevators are not suitable for the vertical lifting of __________ materials.

Sticky (e.g. clay paste)
Fine (e.g. - 200 mesh size coal)
Free flowing
Small lumpy (e.g. grains and sand)

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Mechanical Operations
Arrange the following size reduction equipment in the decreasing order of the average particle size produced by each of them.

Ball mill, Jaw crusher, Fluid energy mill
Fluid energy mill, Ball mill, Jaw crusher
Jaw crusher, Ball mill, Fluid energy mill
Fluid energy mill, Jaw crusher, Ball mill

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