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

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

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Mechanical Operations
In case of a hammer crusher,

Crushing takes place by impact breaking
Maximum acceptable feed size is 30 cms
All of these
Reduction ratio can be varied by adjusting the distance from cage to hammers

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