Discussion
Match each component in List I with its function in List II.
List I
A. Cylinder and concave
B. Straw walkers
C. Cleaning shoe
D. Grain auger
List II
1. Shaking grain out of the straw mat
2. Detaching grain from the head
3. Conveying clean grain to the tank
4. Separating grain from chaff with sieves and air
Select the correct match.
Answer: B
Correct answer: A-2, B-1, C-4, D-3
Each component is matched to its function. The cylinder and concave (A) detach grain from the head (2). The straw walkers (B) shake grain out of the straw mat (1).
The cleaning shoe (C) separates grain from chaff with sieves and air (4), and the grain auger (D) conveys the clean grain to the tank (3). The sequence is a progression through ever cleaner mixtures - whole crop, then straw and grain, then grain and chaff, then grain alone.
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