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Capacity of an air screen cleaner depends on which of the following parameters?
(A) . Grain bed depth
(B) . Size of screen surface
(C) . Feeding mechanism
(D) . Percentage opening area of screen
Choose the correct answer from the options given below:
EXPLANATION
Grain Cleaning & Separation Operations
- Factors Governing Air-Screen Grain Cleaner Capacity:
- An air-screen grain cleaner separates impurities based on aerodynamic drag (aspirator air duct) and particle dimensions (screens):
- Grain bed depth: Governs screen stratification and air passage.
- Size of screen surface: Width and length define total active screening area ($m^2$).
- Feeding mechanism: Ensures uniform, non-pulsing curtain flow across the full screen width.
- Percentage opening area of screen: Dictates open perforation fraction through which clean grain passes.
- Conclusion: Capacity depends on (A), (B), (C) and (D) (Option 3).
Correct option: (3) (A), (B), (C) and (D).
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