Allied & ICAR Exam Bank • ALLIED_1294 MCQ • 1 Mark

Section 6: Agricultural Process Engineering

Grain Storage Structures and Silos

Subtopic: Grain Aeration

Question Statement:

The primary operational purpose of low-volume aeration fans (0.05 to 0.1 m$^3$/(min$\cdot$tonne)) installed in grain storage silos is to:

Options:

  • (A) Prevent moisture migration and eliminate hot spots by equalizing grain temperature across the bulk mass
  • (B) Dry wet grain rapidly from 24% to 12% moisture
  • (C) Fluidize the grain mass for emptying
  • (D) Crush insect eggs mechanically

Answer Key:

A

Step-by-Step Solution & Explanation

Thermal gradients between silo walls and core set up internal convective air loops that carry moisture to the cold top layer; low-rate aeration equalizes temperatures to prevent condensation capping.
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