Question:
The ability of a screen in separating the feed into over flow and under flow according to its size is called as ----------.
The ability of a screen in separating the feed into over flow and under flow according to its size is called as ----------.
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Screen effectiveness depends on factors like moisture content, feed rate, and the vibration frequency of the screening deck.
Updated On: Jul 10, 2026
- Overall effectiveness
- Cleanliness
- Cleaning efficiency
- Screen effectiveness
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
Screening is a mechanical separation process that groups particles by size.
The feed is separated into an overflow fraction (oversize particles retained on the screen) and an underflow fraction (undersize particles passing through the screen openings).
Step 2: Detailed Explanation:
1. The performance of an industrial screen is measured by its Screen Effectiveness (sometimes called screen efficiency).
2. It is defined as the ratio of the mass of undersize material that passes through the screen to the mass of undersize material in the feed, multiplied by the ratio of oversize material retained on the screen to the oversize material in the feed.
3. This calculation evaluates how cleanly the screen separates the feed into distinct size fractions.
Step 3: Final Answer:
The ability of a screen to separate material by size into overflow and underflow is called Screen effectiveness.
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