Mechanical Operations
In case of a hammer crusher,

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

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

None of these
Assumption that all particles in a single fraction are equal in size
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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