Allied & ICAR Exam Bank • ALLIED_0611 MCQ • 1 Mark

Section 6: Agricultural Process Engineering

Psychrometry and Grain Drying

Subtopic: Psychrometry and Grain Drying

Question Statement:

Hysteresis in moisture sorption isotherms of agricultural grains refers to the phenomenon where:

Options:

  • (A) Equilibrium moisture content during desorption is higher than during adsorption at the same relative humidity and temperature
  • (B) Adsorption moisture is higher than desorption
  • (C) Moisture content is independent of relative humidity
  • (D) Isotherm is completely linear

Answer Key:

A

Step-by-Step Solution & Explanation

Due to ink-bottle capillary condensation and pore collapse during drying, desorption EMC is consistently higher than adsorption EMC at identical RH.
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