A 500 kg thresher feed has grain:straw ratio 3:2. Blown-grain loss is 0.05%, separation loss 0.5%, cleaning efficiency 99.1%, and threshing efficiency 100%. Find grain recovered at the main outlet in kg (two decimals).
The feed contains 500×3/5=300 kg grain. Subtract the two grain-loss fractions: recovered grain=300[1−(0.05+0.5)/100]=298.35 kg. Cleaning efficiency describes the purity of the collected output, not another fraction of grain lost, so it is not multiplied into grain recovery.
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