Discussion
Match each machine in List I with what it removes in List II.
List I
A. Destoner
B. Magnetic separator
C. Scalping screen
D. Cyclone
List II
1. Ferrous tramp metal
2. Stones and dense foreign matter
3. Dust and chaff from the air stream
4. Oversize trash from the grain stream
Select the correct match.
Answer: C
Correct answer: A-2, B-1, C-4, D-3
Four machines removing four different things. A destoner takes out stones and other dense foreign matter. A magnet takes out ferrous tramp metal, which would otherwise damage rolls or start a spark. A scalping screen removes oversize trash from the grain stream. And a cyclone recovers dust and chaff from the aspiration air rather than from the grain.
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