Discussion
Three of the following act on the grain stream. Which acts on the air stream?
Cyclone
Destoner
Indented cylinder
Scalping screen
Answer: D
Correct answer: Cyclone
A cyclone handles the air leaving the aspiration system, spinning it so that the entrained dust and chaff are thrown to the wall and drop out while the cleaned air passes on to the fan. The other three all act on the grain itself - removing stones, sorting on length, or scalping off oversize trash.
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