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

ANSWER DOWNLOAD EXAMIANS APP

Mechanical Operations
In case of a hammer crusher,

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

ANSWER DOWNLOAD EXAMIANS APP