Allied & ICAR Exam Bank • ALLIED_1277 MCQ • 1 Mark

Section 6: Agricultural Process Engineering

Mechanical Separation and Cleaning

Subtopic: Specific Gravity Separator

Question Statement:

A specific gravity separator (gravity table) separates seeds of identical physical size and shape by exploiting differences in their:

Options:

  • (A) Apparent bulk density / specific gravity, through an upward air cushion over an inclined reciprocating eccentric deck
  • (B) Length using indented indentations
  • (C) Ferromagnetic susceptibility
  • (D) Color using optical photodiodes

Answer Key:

A

Step-by-Step Solution & Explanation

Air fluidization stratifies seeds vertically by density (heavy seeds contact deck cloth; light seeds float), while deck oscillations propel dense seeds uphill and light chaff floats downhill.
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