Q70: Capacity of an air screen cleaner depends on which of... - Thermochemical Conversion Technology - Renewable Energy Engineering- ICAR JRF/SRF 2024 | Agrigyan

• 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).