Question Bank • QB_APE_EXP_035 MCQ • 1 Mark

Section 6: Agricultural Process Engineering

Size Reduction and Material Handling

Subtopic: Mechanics and energy requirement in size reduction of agriculture produce

Question Statement:

Which of the three classical comminution energy hypotheses (Rittinger, Kick, Bond) is most suitable and accurate for coarse crushing operations?

Options:

  • (A) Kick's law
  • (B) Rittinger's law
  • (C) Bond's law
  • (D) Stokes' law

Answer Key:

A

Step-by-Step Solution & Explanation

General applicability of comminution laws: • Kick's law applies best to coarse crushing (feed
gt; 50\text{ mm}$) where energy is consumed in internal elastic strain. • Bond's law applies best to intermediate grinding ($50\text{ mm}$ down to $0.05\text{ mm}$). • Rittinger's law applies best to fine and ultrafine grinding (
lt; 0.05\text{ mm}$) where new surface energy dominates.
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