Question Bank • QB_APE_EXP_033 MCQ • 1 Mark

Section 6: Agricultural Process Engineering

Size Reduction and Material Handling

Subtopic: Centrifugal separation of solids, liquids and gases

Question Statement:

In a cyclone dust separator, the cut size ($d_{pc}$ or $d_{50}$) is defined as the particle diameter for which the collection efficiency is:

Options:

  • (A) $50\%$
  • (B) $100\%$
  • (C) $90\%$
  • (D) $10\%$

Answer Key:

A

Step-by-Step Solution & Explanation

The cut diameter ($d_{50}$) of a cyclone or centrifugal separator is standardly defined as the aerodynamic particle size collected with exactly $50\%$ fractional efficiency (particles larger than $d_{50}$ are collected with
gt;50\%$ efficiency).
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