Allied & ICAR Exam Bank • ALLIED_0982 MCQ • 1 Mark

Section 7: Dairy and Food Engineering

Dairy Processing Equipment

Subtopic: Evaporators and Drying Equipment

Question Statement:

In spray dryer powder collection, the cut size diameter ($d_{pc}$) of a cyclone separator represents:

Options:

  • (A) The particle size that is collected with exactly $50\%$ collection efficiency
  • (B) The largest particle in the feed
  • (C) The smallest atom
  • (D) The cyclone barrel diameter

Answer Key:

A

Step-by-Step Solution & Explanation

Lapple defined cut diameter $d_{pc}$ as the aerodynamic particle diameter that has a $50\%$ probability of being separated into the hopper versus escaping in the exhaust air stream.
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