GATE AG 2020 • Q23 MCQ • 1 Mark

Section 6: Agricultural Process Engineering

Evaporation and Drying

Subtopic: Concentration and drying of liquid foods – evaporators, tray, drum and spray dryers

Question Statement:

Both particle formation and drying processes are carried out by:

Options:

  • (A) Flash dryer
  • (B) Fluidized bed dryer
  • (C) Pneumatic conveyor dryer
  • (D) Spray dryer

Official Answer Key:

D

Step-by-Step Solution & Explanation

In spray drying, a liquid feed is atomized into fine droplets which simultaneously form discrete particles and dry rapidly in a hot-air chamber, uniquely combining particle formation with drying in a single step.

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