Question Bank • QB_SUB_APE_0003 MSQ • 2 Marks

Section 6: Agricultural Process Engineering

Evaporation and Drying

Subtopic: Drying and milling of cereals, pulses and oilseeds

Question Statement:

During thin-layer convective drying of grains in the falling-rate drying period:

Options:

  • (A) Drying rate is controlled by internal moisture diffusion to the grain surface
  • (B) The surface of the grain is no longer covered with a continuous film of free water
  • (C) Grain temperature gradually rises toward the drying air temperature
  • (D) Drying rate remains strictly constant over time

Answer Key:

A, B, C

Step-by-Step Solution & Explanation

Falling-rate drying is diffusion-controlled; surface film dries out, drying rate continuously declines, and grain approaches air temperature.
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