Subtopic: Sources of power on the farm – human, animal, mechanical, electrical, wind, solar and biomass
Question Statement:
Match the hulling mechanism in Column 1 with the corresponding machine in Column 2:
| Column 1 | Column 2 |
|---|---|
| P) Shear and compression | 1) Blade type emery scourer |
| Q) Friction and abrasion | 2) Horizontal Gota machine |
| R) Shear, compression and friction | 3) Rubber roll dehusker |
| S) Impact, abrasion and friction | 4) Under runner disc sheller |
Options:
(A) P-3, Q-2, R-4, S-1
(B) P-3, Q-1, R-2, S-4
(C) P-3, Q-1, R-4, S-2
(D) P-4, Q-3, R-1, S-2
Official Answer Key:
C
Step-by-Step Solution & Explanation
By standard grain-processing machinery classification: Rubber roll dehusker works by shear and compression between two counter-rotating rubber rolls (P-3); the blade-type emery scourer removes bran by friction and abrasion (Q-1); the under-runner disc sheller combines shear, compression and friction between the runner disc and casing (R-4); and the horizontal Gota machine (a centrifugal-type sheller) works by impact, abrasion and friction (S-2). This matches option (C).
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