Discussion
The first and coarsest screen in a cleaner, which removes oversize trash, is the _____ screen.
Answer: D
Correct answer: scalping
Scalping is the first and coarsest stage, removing straw, string, stems and other oversize trash before anything finer is attempted. It comes first for a practical reason: that material would blind the finer decks downstream, so removing it protects everything that follows and is why the order of a cleaning line is not arbitrary.
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