Question: From a crushed quartz sample, the fraction less than 5 m m must be removed by screening. The feed sample contains 3 0 % of

From a crushed quartz sample, the fraction less than 5mm must be removed by screening. The feed sample contains 30% of minus 5mm material. After screening, the oversize fraction contained 85% of plus 5mm size while the undersize fraction contained 12% of plus 5mm. Determine the efficiency of the screen.
 From a crushed quartz sample, the fraction less than 5mm must

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