Subtopic: Mechanics and energy requirement in size reduction of agriculture produce
Question Statement:
Crushing efficiency of any grinder rarely exceeds
Options:
(A) 1%
(B) 5%
(C) 10%
(D) 20%
Official Answer Key:
B
Step-by-Step Solution & Explanation
Standard fact from size-reduction theory (Rittinger's-law efficiency arguments): most of the input energy in crushing/grinding is dissipated as heat, elastic deformation and friction; the fraction that actually creates new surface (crushing efficiency) is very small, conventionally cited as rarely exceeding 5%.
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